TOLLY GROUP WHITE PAPER. January A white paper commissioned by Hewlett-Packard Co. Document # The Tolly Group T H E

Size: px
Start display at page:

Download "TOLLY GROUP WHITE PAPER. January 2004. A white paper commissioned by Hewlett-Packard Co. Document #204114. 2004 The Tolly Group T H E"

Transcription

1 GROUP The authoritative, unbiased source for IT certification, research and testing WHITE PAPER January 2004 A white paper commissioned by Hewlett-Packard Co. Document # "Dispelling VoIP Myths" with HP ProCurve Networking Head-to-Head Testing of 3Com, Cisco and Mitel VoIP Solutions Shows HP ProCurve Switching Infrastructure is a Viable Alternative to a Homogenous Vendor Approach 2004 The Tolly Group

2 Statement of Licensing Info and Acceptable Usage Entire contents 2004 The Tolly Group, Inc. All rights reserved. For additional information on acceptable usage of this document (Tolly Group Document # ) contact The Tolly Group at (561) or via at Reproduction of this publication in any form without prior written permission is forbidden. The information contained herein is believed to be accurate and reliable. The Tolly Group shall have no liability for errors, omissions or inadequacies in the information contained herein or for interpretations thereof. All excerpts from this report must be approved by The Tolly Group in advance of publication or use in any public materials. Tolly Group Services With more than 15 years experience validating leading-edge Information Technology products and services; The Tolly Group has built a global reputation for producing accurate and unbiased evaluations and analysis. We employ time-proven test methodologies and fair testing principles to benchmark products and services with the highest degree of accuracy. Launched in 2003, The Tolly Group's "Tolly Verified" service provides in-depth, vendor-neutral certification of an array of features, functions and performance characteristics in technology disciplines as diverse as WLAN Switching and Anti-spam. See our "Tolly Verified" Home Page. Our "Up-to-Spec" service provides the custom testing complement to the "standard", granular tests offered in "Tolly Verified". See our "Up-to-Spec" Home Page. Plus, unlike narrowly focused testing labs, The Tolly Group combines its vast technology knowledge with focused marketing services to help clients better position product benchmarks for maximum exposure. This document was authored by: Kevin Tolly, President/CEO The Tolly Group Charles Bruno, Executive Editor The Tolly Group

3 Table of Contents 1 Executive Summary 1 Meeting the Challenge 3 Dispelling VoIP Myths 4 AVVID transport: HP and Cisco head-to-head comparison 6 AVVID over Cisco 6 AVVID over Catalyst: PSQM results 7 AVVID over Catalyst: PESQ results 7 AVVID over Catalyst: Latency results 7 AVVID over ProCurve 7 AVVID over ProCurve: PSQM results 8 AVVID over ProCurve: PESQ results 8 AVVID over ProCurve: Latency results 9 NBX over 3Com 9 NBX VoIP over 3Com: PSQM results 9 NBX VoIP over 3Com: PESQ results 10 NBX VoIP over 3Com: Latency results 10 NBX VoIP over ProCurve: PSQM results 10 NBX VoIP over ProCurve: PESQ results 11 NBX VoIP over ProCurve: Latency results 11 ProCurve as a Viable VoIP Transport 12 ProCurve 2650-PWR scenario 12 PSQM results 12 PESQ results 13 ProCurve 2650-PWR latency results 13 ProCurve 4104 scenario 13 PSQM results 14 PESQ results 14 ProCurve 4104 latency results 14 ProCurve 5304 scenario

4 14 PSQM results 15 PESQ results 15 ProCurve 5304 latency results 15 Call-Quality Analysis List of Figures Figure 1. Call quality test bed diagram Figure 2. AVVID over Catalyst PSQM scores Figure 3. AVVID over Catalyst PESQ scores Figure 4. AVVID over ProCurve PSQM scores Figure 5. AVVID over ProCurve PESQ scores Figure 6. 3Com NBX-100 PSQM scores Figure 7. 3Com NBX-100 PESQ scores Figure 8. 3Com NBX-100 PSQM scores over HP ProCurve network Figure 9. 3Com NBX-100 PESQ scores over HP ProCurve network Figure 10. HP ProCurve Switch 2650-PWR PSQM scores Figure 11. HP ProCurve Switch 2650-PWR PESQ scores Figure 12. HP ProCurve Switch 4104gl PSQM scores Figure 13. HP ProCurve Switch 4104gl PESQ scores Figure 14. HP ProCurve Switch 5304xl PSQM scores Figure 15. HP ProCurve Switch 5304xl PESQ scores

5 Executive Summary Extensive call-quality tests conducted independently by The Tolly Group in September 2003 show that Hewlett-Packard Co.'s ProCurve enterprise LAN switching infrastructure is a fertile network transport for voice over IP (VoIP) traffic generated by a diverse set of IP PBX products from multiple vendors. HP products gracefully supports call-quality levels on par with, or better than, those provided by a pure Cisco Catalyst network or a pure 3Com Corp. switch fabric when transporting VoIP alongside data traffic. Tests results offer conclusive evidence that Cisco AVVID traffic transported over an HP ProCurve switching infrastructure achieves virtually the same toll quality as AVVID traffic that rides over a Cisco Catalyst network. What's more, HP ProCurve supports VoIP traffic generated by other third-party solutions, such as IP PBXes from Mitel Corp. Hands-on testing shows that these devices can deliver VoIP calls that are either on par with, or better than, the call quality delivered by Cisco's AVVID either in a pure Catalyst environment, or over an HP ProCurve switched network. This demonstrates that users should investigate the full extent of the VoIP options available that provide the best price/performance and flexibility to meet user requirements. Meeting the Challenge Never before have enterprise local area networks been so complex. Enterprise LANs have evolved far beyond the pipeline to ferry and conduct file transfers for integrated workgroups of users. Today, enterprise LANs have evolved into complex networks that handle traditional data types alongside voice and video. Enterprise LANs now serve company employees, suppliers and customers forcing network architects to deal with a range of issues such as network flexibility, security, reliability, reduced complexity all while offering a competitive return on investment. The net result is an underlying network infrastructure that delivers varying levels of access and service, depending upon user type and application. These network infrastructures must embrace services that address strategic corporate needs for security, mobility and convergence that make the network flexible enough to support existing services while also accommodating innovations that are absorbed into the network. 1

6 In today's business climate, enterprise LANs must adapt, quickly, to support business requirements and to extend business services and access to resources worldwide, or to local business partners. HP Adaptive EDGE Architecture focuses on: Traffic monitoring VLAN integration Implementation of standard traffic routing Extensive traffic prioritization/ QoS In essence, enterprise LANs are being transformed into public-like networks that provide flexible access to corporate resources on an anytime, anywhere basis provided authenticated users are permitted to access the services and resources they desire. While there are many ways to deliver such a network infrastructure, HP has built an architecture that pushes intelligence to the edge of the network where network administrators provide centralized control over network services. In older enterprise networks, decision-making was highly centralized to parcel out network access, oversee traffic prioritization, direct traffic flows and groom bandwidth. However, as new applications emerge, it is vital that decision-making gets pushed out to the edge of the network the junction where users connect to address resource requirements where they are needed most. Depending upon user privileges, network devices at the edge of the enterprise can unlock or lock entry points to various network resources, making the network edge the gateway to the enterprise resources. The HP Adaptive EDGE Architecture TM embraces that type of distributed edge services concept. In a nutshell, the Adaptive EDGE Architecture focuses on: Traffic monitoring to control bandwidth optimization throughout the network Integration of industry-standard VLAN and other security capabilities to establish access management controls at edge devices Implementation of standard traffic routing and Layer 2 mesh capabilities to provide path failover and multi-path load balancing to improve "always-on" reliability Extensive traffic prioritization to provide traffic-type coexistence and Quality of Service (QoS) functions to support current and future voice, video and content delivery applications. It is this very control to the edge philosophy that makes HP ProCurve Networking well suited to support VoIP. VoIP applications utilize Layer 2/3/4 traffic prioritization to ensure voice packets receive the bandwidth they need and packets are not discarded, and that latency is minimized from network edge to network edge. Moreover, HP's extensive support for standards ensures that the ProCurve infrastructure is open and interoperable with major IP telephony gear, so that VoIP traffic created on any third-party VoIP gateway will be transported over the HP ProCurve switching infrastructure. 2

7 (For a more detailed understanding, check out the HP ProCurve Networking Adaptive EDGE Architecture TM white paper at: Recent testing conducted by The Tolly Group, investigates the voice quality delivered by HP as it carries a variety of VoIP traffic created by different brand VoIP solutions. One of the urban myths circulating in the IT community is that VoIP traffic generated by a specific brand of IP PBX must run over that same vendor's switching infrastructure to maintain acceptable toll quality to end users. VoIP traffic, however, is founded upon the bedrock of IP, which means that whatever IP-based switching infrastructure is employed, VoIP traffic should flow across any IP switching network equally well. The purpose of the testing effort was not to prove necessarily that one LAN switching infrastructure platform or voice solution was better than the other. Rather testing was designed to demonstrate that HP ProCurve provides an acceptable switching infrastructure, regardless of the voice solution vendor. Specifically, The Tolly Group set out to prove the HP ProCurve switching infrastructure is a fertile switching environment for the transport of VoIP traffic created by virtually any brand of VoIP IP PBX. Moreover, tests sought to prove that HP ProCurve can deliver sufficient voice quality on par or better than VoIP running across switching infrastructures from Cisco Systems and 3Com Corp. Dispelling VoIP Myths When it comes to the uncharted waters of Voice over IP (VoIP), fear, uncertainty and doubt play a central role at many organizations embarking upon a VoIP infrastructure deployment. Given the strategic importance of converged networks, few organizations want to take the VoIP plunge without assurance that the underlying switching infrastructure can deliver effective voice call quality. Unfortunately, verbal assurances sometimes sound credible, but when put to the test, can be debunked as simple myths. To hear channel partners of market-leading switch maker Cisco Systems tell the story, VoIP is complex, it requires heavy doses of Quality of Service (QoS) and voice traffic supporting Cisco's AVVID (Architecture for Voice, Video and Integrated Data) must run over a homogenous Cisco switching infrastructure to deliver the levels of call quality required for enterpriseclass service. In fact, Cisco fosters the perception that AVVID traffic will not run well over anything but a Cisco switching network to attain business-class call quality. Consider this typical position statement from the Cisco white paper "Cisco AVVID Network Infrastructure Overview:" 3

8 "Cisco AVVID Network Infrastructure provides the technological foundation for Cisco AVVID. It is analogous to a foundation of poured concrete and steel-reinforcement over which an industrial-strength structure stands. Without this foundation, there is no unifying system tying the applications together " Tolly Group engineers measured the call quality of AVVID traffic running over an HP ProCurve network by using the ITU P.861 PSQM and ITU P.862 PESQ metrics. Talk like that is enough to strike fear into users who already have significant investments in Cisco hardware/software for enterprise LANs, and likely will convince them not to explore lower cost alternatives, or solutions that promise to provide greater functionality and flexibility than the Cisco Catalyst switching infrastructure delivers. Talk alone, however, is cheap. What users need is good, solid testing-based research that gives them the type of empirical data required to understand the true facts about VoIP and IP switching. Recent testing conducted by The Tolly Group, compares the voice quality delivered by a Cisco LAN switching infrastructure versus Hewlett-Packard Co.'s ProCurve enterprise LAN switching fabric, providing strong evidence that there is more myth than fact to Cisco's AVVID claims. The Tolly Group also tested the VoIP call quality of a pure 3Com Corp. switched network as it supported VoIP traffic generated by a 3Com NBX-100 IP PBX. (HP commissioned The Tolly Group to compare the voice quality offered by several VoIP gateway offerings that generate real-time voice traffic traveling over a ProCurve switching infrastructure. The Tolly Group compared the toll quality supported by ProCurve to the toll quality of Cisco AVVID traffic running over a pure Cisco Catalyst network and the 3Com NBX -generated VoIP running over a pure 3Com switched network.) AVVID transport: HP and Cisco head-to-head comparison Does Cisco's Catalyst, alone, provide the right transport underpinnings to guarantee high toll quality for voice traffic supporting Cisco's AVVID blueprint? Or can HP's ProCurve switching line provide a transport for Cisco AVVID and other VoIP solutions by delivering call quality either on par or better than a Cisco switching infrastructure? That's precisely what The Tolly Group set out to determine in its head-to-head tests. Tolly Group engineers measured call quality of the AVVID traffic on both switching infrastructures by using two ITU standard metrics to paint an accurate picture the ITU P.861 Perceptual Speech Quality Measurement (PSQM) and the ITU P.862 Perceptual Evaluation of Speech Quality (PESQ). PESQ is actually a replacement to the p.861 standard, but so much of existing marketing materials out there have PSQM that The Tolly Group used both to assist readers with an apples-to-apples comparison. 4

9 VoIP calls earning a PSQM score of less than 1.29 qualify as 'toll quality.' PSQM represents an attempt to create an automated means for assessing objectively the quality of speech flowing across a telephony network. It measures the distortion of a speech signal taking into account the human perception and processing of speech. PSQM scores can range from 0 to 6.5, where the lower the number the better the score. A toll-quality call is usually considered anything less than a 1.29 with a business audio quality score falling in the range of By contrast, PESQ is an enhanced perceptual quality measurement for voice quality in telecommunications. PESQ was specifically developed to be applicable to end-to-end voice quality testing under real network conditions. With PESQ scores ranging from 1 to 4.5, with the high range representing a perfect score; a score of 3.8 or higher represents toll quality, with business audio quality falling in the range of VoIP calls earning a PESQ score of 3.8 or higher qualify as 'toll quality.' Tolly Group engineers also measured the one-way delay (latency) associated with a voice call. To add another wrinkle to the reported results, The Tolly Group measured call quality across a network of three different ProCurve access switches: an HP ProCurve 2650-PWR-PWR (Power over Ethernet), ProCurve 4104 and ProCurve End users have different needs and requirements on the edge of their networks. Engineers tested these three different ProCurve access switches to demonstrate that HP can serve a variety of unique access point requirements and still deliver excellent toll quality. Each of those devices fed traffic upstream to a ProCurve 5308 aggregation switch, which in turn passed it to a ProCurve 9308 core switch and on to the IP phone to the core device. (See Figure 1.) An Agilent Voice Quality Tester (VQT) was used to measure call quality. Figure 1. Call quality test bed diagram 5

10 Conversely, for the AVVID over Cisco infrastructure tests, a Cisco Catalyst 3500 was used as the access switch, a Catalyst 4506 fit in as the aggregation switch and a Catalyst 6509 represented the core switch in a comparable test bed scenario. Engineers recorded call quality scores for a baseline scenario in which engineers established a 64-Kbps voice call using the G.711 voice encoder which is the equivalent to a standard dial-up phone call placed across the PSTN. (G.711 voice encoders create the equivalent of an uncompressed 64 Kbps voice call.) Measurements were taken across the network with no other traffic except for the AVVID traffic flowing between the origination and destination phones. VoIP calls originated from an IP phone connected to the access switch and terminated at an IP phone connected to the core switch. Following the baseline, engineers introduced congestion onto the network and then measured call quality again, with QoS activated. The goal was to determine what effect QoS would have on providing a level of call quality consistency with the baseline scores. In the congestion scenario, engineers connected ports from an Ixia 1600T traffic generator to both the access switch and the aggregation switch and fully subscribed the pipe. Thus, when engineers placed the single G.711 VoIP call on a fully utilized network, it created a condition of oversubscription on the network and QoS facilities kicked in to effectively prioritize the latency-sensitive voice traffic. Figure 2. AVVID over Catalyst PSQM scores Perceptual Speech Quality Measurement (PSQM) Measurement Single G.711 Call Across a Cisco Catalyst Infrastructure (lower scores are better) In every scenario, across both the PSQM and PESQ tests, the ProCurve switching infrastructure carried AVVID traffic with call quality that either was on par or better than provided by the Cisco Catalyst network. AVVID over Cisco PSQM Score The market perception is that in order to achieve satisfactory call quality with Cisco's AVVID, the solution has to run over a Cisco Catalyst switching infrastructure. So, that's where The Tolly Group began its testing, as well, to establish a performance baseline for comparison of VoIP traffic generated by AVVID and non-avvid devices as it flows over the HP ProCurve switch infrastructure Cisco AVVID VoIP Solution Utilized Baseline Congestion with QoS AVVID over Catalyst: PSQM results First, we measured the voice quality of a single G.711 voice call traversing the Cisco switching infrastructure. Testing conducted on AVVID 6

11 traffic traversing a Catalyst switching infrastructure yielded a baseline PSQM score of 0.99 well within the 1.29 ceiling for tollquality voice. (See Figure 2.) Next, we established a single G.711 call over the network in the presence of congestion with QoS active. Here, the Catalyst Figure 3. AVVID over Catalyst PESQ scores infrastructure achieved a PSQM score of 1.0 this is virtually identical to the baseline result. Perceptual Evaluation of Speech Quality (PESQ) Measurement Single G.711 Call Across a Cisco Catalyst Infrastructure PESQ Score (higher scores are better) 4.23 Cisco AVVID 4.35 VoIP Solution Utilized Baseline Congestion with QoS AVVID over Catalyst: PESQ results Here, the Cisco AVVID traffic posted a baseline performance of 4.23 using PESQ and 4.35 when subjected to a congestion scenario with QoS active. These scores are well within toll quality and represent near-perfect audio. (See Figure 3.) AVVID over Catalyst: Latency results In the baseline tests, the AVVID traffic, traveling over the Catalyst infrastructure offered an average one-way delay of 70 milliseconds for the baseline test and 74.4 ms. for the congestion test. These delay results are consistent with low latency normally associated with real-time voice traffic. AVVID over ProCurve Next, we set out to evaluate how Cisco AVVID traffic performs when it is transported over a non-catalyst IP network. The Tolly Group tested this scenario by injecting Cisco AVVID voice traffic across an underlying HP ProCurve infrastructure. Engineers measure call quality of the AVVID traffic for a single G.711 voice call as it traversed a ProCurve network with an access switch, mid-level aggregation switch and core switching element. For the purposes of testing, engineers established call quality measurements with three different ProCurve access switches (ProCurve 2650-PWR, ProCurve 4104 and ProCurve 5304) since each address different user needs. AVVID over ProCurve: PSQM results Cisco's AVVID voice traffic running over the ProCurve switching infrastructure yielded an average PSQM score of 1.01 in baseline testing well within the parameters of meeting toll-quality audio. Interestingly, the 1.01 PSQM score was consistent across the three access switches tested and it compares almost identically to the 0.99 that AVVID traffic scored when traversing the Catalyst network. Next, engineers passed AVVID traffic over the network during a 7

12 Figure 4. AVVID over ProCurve PSQM scores Perceptual Speech Quality Measurement (PSQM) Measurement Single AVVID G.711 Call Across an HP ProCurve Infrastructure (lower scores are better) period of peak bandwidth congestion and QoS active. The PSQM quality when the AVVID traffic passed over a ProCurve 2650-PWR switch was 1.01, versus 1.0 when it traveled across the ProCurve 4104 and ProCurve 5304 devices. Incidentally, these scores were virtually identical in call quality to measurements taken when AVVID traffic was running over the Catalyst infrastructure. PSQM Score HP ProCurve 5304xl Baseline HP ProCurve 2650-PWR Switch Utilized Congestion with QoS HP ProCurve 4104gl AVVID over ProCurve: PESQ results In PESQ tests, AVVID voice traffic running over the ProCurve switching infrastructure yielded an average PESQ score of 4.28 when running across the ProCurve 2650-PWR in PESQ, a score of 3.8 or higher represents toll quality. Testing conducted on AVVID voice traffic transported across a pure Cisco switching fabric yielded baseline PESQ score of 4.23 slightly below the baseline delivered by the AVVID/ProCurve scenario. (See Figure 5.) Figure 5. AVVID over ProCurve PESQ scores PESQ Score Perceptual Evaluation of Speech Quality (PESQ) Measurement Single AVVID G.711 Call Across an HP ProCurve Infrastructure (higher scores are better) HP ProCurve 5304xl Baseline HP ProCurve 2650-PWR Switch Utilized Congestion w ith QoS HP ProCurve 4104gl In the congestion with QoS tests, the ProCurve switching network supporting AVVID traffic yielded a high PESQ score of 4.29 on the ProCurve That compares to a PESQ score of 4.35 for AVVID running across a Catalyst infrastructure. While the pure Cisco scenario delivers a slightly better score, the audio difference would be indiscernible to the human ear both scenarios would deliver toll quality. The PESQ tests confirm what The Tolly Group uncovered in the PSQM tests HP's ProCurve switching infrastructure delivers consistently high toll-quality for AVVID voice calls placed over the network and the toll quality offered by ProCurve is on par, or sometimes better, than what is delivered in the Catalyst network. AVVID over ProCurve: Latency results When ProCurve was paired with the Cisco Catalyst/AVVID solution, an average one-way delay of 75.6 ms was recorded regardless of infrastructure configuration. When QoS was enabled, one-way delay was recorded as 8

13 average of 72.1 ms across the different ProCurve access switches tested. Again, with the ProCurve switching fabric handling Cisco AVVID traffic, the one-way delays were consistent across the infrastructure offerings with the delay typical in the Cisco switching infrastructure. NBX over 3Com 3Com is a well-recognized brand in the VoIP market so The Tolly Group sought to establish voice call quality measurements of VoIP traffic generated by a 3Com NBX-100 IP PBX as it traverses a pure 3Com network. Figure 6. 3Com NBX-100 PSQM scores Perceptual Speech Quality Measurement (PSQM) Single G.711 Call Across a 3Com Switching Infrastructure (lower scores are better) PSQM score Com NBX-100 VoIP system utilized Baseline Congestion with QoS Engineers measured call quality of the NBX VoIP traffic for a single G.711 voice call as it traversed a 3Com network with a 3Com Switch 4400 access switch, a 3Com Switch 4950 mid-level aggregation switch and 3Com Switch 7700 core switching element. NBX VoIP over 3Com: PSQM results First, we measured the voice quality of a single G.711 voice call traversing the 3Com switching infrastructure. Testing conducted on NBXgenerated VoIP traffic traversing a 3Com switching infrastructure yielded a baseline PSQM score of 0.97 well within the 1.29 ceiling for toll-quality voice. (See Figure 6.) Next, we established a single G.711 call over the network in the presence of congestion with QoS active. Here, the 3Com infrastructure achieved a PSQM score of 0.99 this is virtually identical to the baseline result. NBX VoIP over 3Com: PESQ results In PESQ tests, NBX-generated VoIP traffic running over the 3Com switching infrastructure yielded an average PESQ score of 2.16 when running across the 3Com infrastructure in PESQ, a score of 3.8 or higher represents toll quality. (See Figure 7.) In the congestion with QoS tests, the 3Com switching network supporting VoIP traffic yielded a PESQ score of 2.15 well below acceptable toll quality levels for PESQ. These tests show that using PESQ, which factors in significantly more network factors than does PSQM, toll quality of VoIP traffic running over the pure 3Com infrastructure lags that of other devices tested. 9

14 Figure 7. 3Com NBX-100 PESQ scores Perceptual Evaluation of Speech Quality (PESQ) Single G.711 Call Across a 3Com Switching Infrastructure (higher scores are better) NBX VoIP over 3Com: Latency results Latency introduced by the 3Com switching fabric was low at 69 milliseconds, which was on par with latency for other test scenarios NBX VoIP over ProCurve: PSQM results PESQ score Com NBX-100 VoIP system utilized Baseline Congestion with QoS Tolly Group engineers also measured the call quality of VoIP traffic generated by an NBX- 100 as it traversed the HP ProCurve network. NBX-100 traffic running over the ProCurve switching infrastructure yielded an average PSQM score of 1.03 in baseline testing well within the parameters of meeting toll-quality audio. (See Figure 8.) Interestingly, the PSQM score was fairly consistent across the three ProCurve access switches tested (1.01 to 1.05) and it compares almost identically to the 0.99 that VoIP traffic scored when traversing the 3Com network. Figure 8. 3Com NBX-100 PSQM scores over HP ProCurve network Perceptual Speech Quality Measurement (PSQM) Measurement for Hewlett Packard Infrastructure with 5304 Access Switch Single G.711 Call (lower scores are better) PSQM Score HP ProCurve 5304xl HP 2650-PWR HP ProCurve 4104gl Access Switch Utilized Baseline Congestion with QoS Next, engineers passed NBX-generated VoIP traffic over the network during a period of peak bandwidth congestion and QoS active. The PSQM quality when the NBX traffic passed over a ProCurve 2650-PWR switch was 1.02, versus 1.01 when it traveled across the ProCurve 4104 and 1.02 when it ran across the ProCurve 5304 devices. Incidentally, these scores compare virtually identical to measurements taken when NBX traffic was running over the pure 3Com switching infrastructure (0.99). NBX VoIP over ProCurve: PESQ results In PESQ tests, NBX-generated VoIP traffic running over the ProCurve switching infrastructure yielded an average PESQ score of 2.36 when running across the ProCurve 2650-PWR in PESQ, a score of 3.8 or higher represents toll quality. However, this PESQ score is actually better when NBX traffic runs over HP ProCurve than when it runs over a pure 3Com switching fabric. 10

15 Figure 9. 3Com NBX-100 PESQ scores over HP ProCurve network Perceptual Evaluation of Speech Quality (PESQ) Measurement for Hewlett Packard Infrastructure with 5304 Access Switch Single G.711 Call (higher scores are better) PESQ Score In the congestion with QoS tests, the ProCurve switching network supporting NBX-generated VoIP traffic yielded a high PESQ score of 2.39 on the ProCurve 2650-PWR. (See Figure 9.)That compares to a PESQ score of 2.15 for VoIP running across a pure 3Com infrastructure. Thus, testing shows that the HP ProCurve switching infrastructure delivers slightly better toll quality than attained in the pure 3Com switching network though both scores still lag acceptable toll quality levels. NBX VoIP over ProCurve: Latency results 0.00 HP ProCurve 5304xl HP 2650-PWR HP ProCurve 4104gl Access Switch Utilized Baseline Congestion with QoS Latency introduced by the 3Com switching fabric ranged from 79 to 83 ms., which represents very low latency and is comparable to the latency observed in the pure 3Com switching scenario. ProCurve as a Viable VoIP Transport Tests discussed in earlier sections demonstrate how VoIP traffic generated by Cisco AVVID and 3Com NBX-100 solutions provide toll-quality VoIP regardless if the data runs over a pure Cisco network, a 3Com switching infrastructure or across an HP ProCurve switching fabric. Many users, today, adopt best-of-breed solution strategies, where they mix and match components from several manufacturers that represent the best performers in their class. HP has partnered with Mitel Corp. long considered one of the premiere VoIP IP PBX makers to integrate the Mitel Corp Integrated Communications Platform (ICP), an IP PBX designed for VoIP applications that HP also markets, into an HP ProCurve infrastructure. This chapter explores the performance of that hybrid solution and compares its performance to the 3Com and Cisco call quality results previously discussed. In each case, all VoIP gateway solutions were tested in an apples-to-apples scenario as either NBX-100-generated or AVVID-generated VoIP traffic traversed the HP ProCurve switching fabric. Engineers established a single G.711 VoIP call from the switch to any of three ProCurve access switches, which then passed the call into the 11

16 ProCurve network to an aggregation switch and on to a core switch where the call was terminated. Figure 10. HP ProCurve Switch 2650-PWR PSQM scores The objective of this chapter is to demonstrate conclusively that the HP ProCurve switching fabric is a hospitable host for VoIP traffic, regardless of the brand of VoIP gateway used. The ensuing sections report on the call quality of the Mitel, 3Com NBX-100 and Cisco AVVID VoIP traffic as it passes over the ProCurve infrastructure. Also, each section is based upon one of three HP ProCurve access switches employed; HP elected to test the variety of access switch choices to demonstrate the breadth of its offerings that appeal to diverse user requirements. ProCurve 2650-PWR scenario PSQM results Perceptual Speech Quality Measurement (PSQM) Measurement Single G.711 Call Across an HP Infrastructure with a ProCurve 2650-PWR (lower scores are better) Engineers tested VoIP traffic traversing a ProCurve infrastructure in which a G.711 call originated from a phone attached to a Mitel 3300-ICP. Baseline tests revealed that the Mitel 3300-ICP voice solution combined with the ProCurve switched network delivered a PSQM score of 0.56, which equates to excellent toll quality, significantly surpassing the call quality offered by the AVVID over Cisco Catalyst infrastructure scenario. PSQM Score Tolly Group engineers also measured the call quality of a single G.711 voice call that emanated from a 3Com NBX-100 and traveled across the ProCurve switching infrastructure. Even the NBX-100's PSQM score of 1.05 was competitive in toll quality with the call quality of AVVID traffic running over the Catalyst network (1.01). (See Figure 10.) Mitel 3300-ICP Cisco AVVID 3Com NBX-100 VoIP Solution Utilized Baseline Congestion with QoS PESQ results In the congestion with QoS scenario, again the Mitel 3300-ICP delivered superior call quality to the Cisco AVVID solutions with a PSQM score of Again, the 3Com NBX-100 achieved a PSQM score of 1.02, which is on par with the PSQM delivered by the Cisco AVVID solution. In PESQ tests, the Mitel 3300-ICP passed VoIP traffic across a ProCurve 2650-PWR to yield a PESQ score of 4.26, which is on par with the AVVID/ProCurve scenario. (See Figure 11.) Such scores reflect the fact that HP's ProCurve delivers consistent, high-quality 12

17 Figure 11. HP ProCurve Switch 2650-PWR PESQ scores Perceptual Evaluation of Speech Quality (PESQ) Measurement Single G.711 Call Across an HP Infrastructure with a ProCurve 2650-PWR (higher scores are better) voice traffic, regardless if it is handling VoIP traffic generated by AVVID-based or Mitel 3300-ICP-based systems. Even in the congestion with QoS tests, the Mitel 3300 ICP delivered PESQ scores that were consistent with the Cisco solution traveling over the ProCurve network and even on par with the pure Cisco configuration. ProCurve 2650-PWR latency results PESQ Score Mitel 3300-ICP Cisco AVVID 3Com NBX-100 The single G.711 voice call traveling over the ProCurve 2650-PWR switch resulted in latency ranging from 79 ms. for the NBX-100 to 80.4 ms. for the Mitel 3300-ICP both of which are on par with latency offered by the Cisco solutions. ProCurve 4104 scenario VoIP Solution Utilized Baseline Congestion w ith QoS PSQM results Figure 12. HP ProCurve Switch 4104gl PSQM scores Perceptual Speech Quality Measurement (PSQM) Measurement Single G.711 Call Across an HP Infrastructure with a ProCurve 4104gl (lower scores are better) Engineers tested VoIP traffic traversing a ProCurve 4104 infrastructure utilizing a Mitel 3300-ICP. Baseline tests revealed that the Mitel 3300-ICP voice solution combined with the ProCurve switched network delivered a PSQM score of 0.56, the same excellent toll quality attained across the ProCurve 2650-PWR. This toll quality compares to the 0.99 score of the Cisco AVVID traffic running over a Cisco Catalyst network and underscores the fact that the HP ProCurve network is a fertile infrastructure for the transport of real-time, latency-sensitive VoIP traffic. PSQM Score Mitel 3300-ICP Cisco AVVID 3Com NBX-100 VoIP Solution Utilized Baseline Congestion with QoS Tolly Group engineers also measured the call quality of a single G.711 voice call that emanated from a 3Com NBX-100 and traveled across the ProCurve switching infrastructure. The NBX-100's PSQM score of 1.02 was competitive in toll quality with the 1.01 call quality score of AVVID traffic running over the ProCurve network. (See Figure 12.) In the congestion with QoS scenario, again the Mitel 3300-ICP delivered superior call quality to the Cisco AVVID solutions with a PSQM score of Again, the 3Com NBX-100 achieved a 2004 The Tolly Group 13 January 2004

18 Figure 13. HP ProCurve Switch 4104gl PESQ scores PESQ Score Perceptual Evaluation of Speech Quality (PESQ) Measurement Single G.711 Call Across an HP Infrastructure with a ProCurve 4104gl (higher scores are better) Mitel 3300-ICP Cisco AVVID 3Com NBX-100 VoIP Solution Utilized Baseline Congestion with QoS Figure 14. HP ProCurve Switch 5304xl PSQM scores PSQM Score Perceptual Speech Quality Measurement (PSQM) Measurement Single G.711 Call Across an HP Infrastructure with a ProCurve 5304xl (lower scores are better) Mitel 3300-ICP Cisco AVVID 3Com NBX-100 VoIP Solution Utilized Baseline Congestion with QoS PSQM score of 1.01, which is on par with the PSQM delivered by the Cisco AVVID solution. PESQ results Engineers tested the PESQ score of a single voice call originating from a phone attached to a ProCurve 4104 switch, passing across the ProCurve network to a core switch where it was terminated. Here, again, the Mitel 3300-ICP delivered excellent toll quality with a PESQ score of 4.29 in baseline tests, on par with the 4.28 for the AVVID traffic running across the HP infrastructure. In the congestion with QoS tests, the scenario was the same with the Mitel 3300-ICP scoring 4.26 PESQ and the Cisco AVVID solution achieving a (See Figure 13.) ProCurve 4104 latency results The single G.711 voice call traveling over the ProCurve 4104 switch resulted in latency ranging from a low of 59 ms. for the Mitel ICP to 83 ms. for the NBX-100. In the congestion scenario with QoS, the latency on the Mitel perked up to 83 ms. All the latency results were well within line of acceptable real-time VoIP latency. ProCurve 5304 scenario PSQM results The Mitel 3300-ICP made it a perfect trio of PSQM results by posting a baseline score of 0.55 in the ProCurve 5304 test meaning in each of the three ProCurve access switch scenarios, the Mitel 3300-ICP delivered PSQM call quality of 0.56 or better versus 0.99 for the pure Cisco scenario. While both the Mitel and Cisco PSQM results indicate excellent toll quality, it is important to note that the Mitel solution beats the Cisco alternative time after time in both call quality and latency performance. With the ProCurve 5304 used as an access switch, the NBX-100 achieved a PSQM score 14

19 of 1.01 for the baseline test, well on par with the Cisco AVVID over ProCurve results. (See Figure 14.) For the congestion with QoS tests, again the Mitel 3300-ICP lead all devices with a PSQM of 0.62, versus 1.02 for the NBX-100 and 1.00 for the Cisco solution. Figure 15. HP ProCurve Switch 5304xl PESQ scores PESQ results PESQ Score Perceptual Evaluation of Speech Quality (PESQ) Measurement Single G.711 Call Across an HP Infrastructure with a ProCurve 5304xl (higher scores are better) In PESQ tests, the Mitel 3300-ICP distanced itself from other devices tested by posting a PESQ score of 4.27 versus 4.03 for the Cisco and 2.31 for the NBX-100 when tested with the ProCurve 5304 as the access switch. (See Figure 15.) When the test was conducted with congestion and active QoS, the Mitel 3330-ICP earned a score of 4.26, versus 4.0 for the Cisco and 2.33 for the NBX-100. ProCurve 5304 latency results Mitel 3300-ICP Cisco AVVID VoIP Solution Utilized 3Com NBX-100 The single G.711 voice call traveling over the ProCurve 5304 switch resulted in latency ranging from a low of 67 ms. for the Mitel 3300-ICP and the Cisco AVVID solutions to 79 ms. for the NBX-100 in the baseline test. In the Baseline Congestion with QoS congestion scenario with QoS, the latency on the Mitel 3300 was 65 ms. And the NBX-100 rose to 81.5 ms. All the latency results were well within line of acceptable real-time VoIP latency. Call-Quality Analysis Tests provide ample evidence that no matter what VoIP gateway generates voice traffic, HP 's ProCurve switching infrastructure can transport it at call quality levels that are either on par with, or better than, those supported by a pure Cisco or pure 3Com switching network. Tests results show that AVVID VoIP traffic runs just as well across an HP ProCurve enterprise LAN switching infrastructure as it does across a homogenous Cisco switch fabric. These results discount any contention that a homogenous Cisco LAN switching platform is required to obtain consistently high call quality with AVVID. Moreover, tests demonstrate that both the HP ProCurve and the Cisco Catalyst switches administer QoS effectively, and that Cisco does not wield any advantage from a QoS perspective vis a vis VoIP. Call quality, 15

20 in fact, remained constant for both the ProCurve and Cisco Catalyst switching infrastructures when QoS was active, as compared to baseline call quality scores. HP's ProCurve switch fabric, for instance, delivered a slightly higher call quality for baseline tests when compared to the Cisco infrastructure. And while Cisco held a slight edge in call quality in the congestion scenario, the difference would be largely imperceptible to the human ear since both the Cisco and the ProCurve switch fabrics delivered excellent toll quality. Another variable to consider is the impact that delay has on call quality. The ProCurve switching/voip solutions tested demonstrate that HP can deliver one-way delay on par or better than Cisco. Moreover, even in heavily loaded oversubscription scenarios with QoS active, delay does not fluctuate wildly, but actually decreases in two of the three switching/ VoIP solution sets, while Cisco's delay increased slightly by about 6% from the baseline to the congestion tests. This shows that HP's ProCurve line and its QoS facilities can effectively manage voice traffic over congested links without permitting delay to impact the quality of voice calls. In fact, the Mitel 3300-ICP results demonstrate that HP ProCurve can support a level of call quality that even exceeds that offered by Cisco AVVID on a pure Catalyst infrastructure. Users would be wise to contemplate ProCurve and any of its third-party VoIP gateways as viable alternatives to a pure Cisco VoIP play. Also, such results demonstrate the implementation of QoS is not a Herculean effort, but rather one of several steps organizations must implement to guarantee voice traffic receives the preferential treatment it deserves. In fact, QoS goes hand in hand with careful bandwidth planning in the deployment of VoIP services. QoS alone cannot guarantee effective treatment of VoIP traffic. Users need to measure the bandwidth requirements for the network and apportion adequate reserves of bandwidth to handle surges in traffic. This becomes the bandwidth foundation of the converged network infrastructure. QoS comes into play as an insurance policy in the event that bandwidth reserves become depleted due to oversubscription of links. Of course, that means that switch pricing comes into play as a gating factor in terms of how much bandwidth users can afford to deploy. With HP, the aggressive price/performance of its ProCurve switches enables users to implement plentiful amounts of bandwidth at significant savings or lower than a Cisco switch fabric. (See The Tolly Group/HP white paper, "Gaining an Intelligent Edge for VoIP with HP.") To download the complete document from the Web, go to: 16

21 Cisco, on the other hand, demands a premium for its switching products meaning that users may not be able to afford to deploy the same breadth of switches, and ultimately bandwidth, that ProCurve users can. From that perspective, it's no surprise that Cisco would promote a QoScentric view of VoIP management. HP's approach, however, is more balanced. It stresses judicious bandwidth planning, with reserve capacities figured in, and high-quality QoS as an insurance policy that kicks in when bandwidth becomes saturated. No matter what your needs, large or small, everyone wants to get the most for their money. Many users have been programmed to believe that buying from a single source has advantages, but many times it comes at a very high price. Best-of-breed mentality is the way to go to help ensure that you get not just what you want, but what you need. Every company's needs are slightly different, and by selecting the switching and VoIP infrastructure individually based on verifiable performance, features and price will help prevent you from being 'married' to a vendor that might be great at some things and marginal at others. The goal is to work with a vendor that delivers to you what is needed at a cost that you and your company can afford. ### 17

22 Information technology is an area of rapid growth and constant change. The Tolly Group conducts engineering-caliber testing in an effort to provide the internetworking industry with valuable information on current products and technology. While great care is taken to assure utmost accuracy, mistakes can occur. In no event shall The Tolly Group be liable for damages of any kind including direct, indirect, special, incidental, and consequential damages which may result from the use of information contained in this document. All trademarks are the property of their respective owners. T H E GROUP The Tolly Group, Inc FAU Blvd. Suite 100 Boca Raton, FL Phone: Fax: The Tolly Group 18 January 2004

Quality of Service Testing in the VoIP Environment

Quality of Service Testing in the VoIP Environment Whitepaper Quality of Service Testing in the VoIP Environment Carrying voice traffic over the Internet rather than the traditional public telephone network has revolutionized communications. Initially,

More information

convergence: preparing the enterprise network

convergence: preparing the enterprise network hp procurve networking business january 2003 convergence: preparing the enterprise network business white paper protecting investments with the hp procurve adaptive EDGE architecture table of contents

More information

Perform: Monitor to Assure a Great User Experience

Perform: Monitor to Assure a Great User Experience Whitepaper Perform: Monitor to Assure a Great User Experience Introduction IP-based network infrastructures provide many benefits. They open the door to creating a Unified Communications (UC) environment

More information

Introduction... 2 Figure 1. Enterprise Packet Voice Market...2

Introduction... 2 Figure 1. Enterprise Packet Voice Market...2 HP ProCurve Networking Business IP Telephony Solution White Paper Introduction... 2 Figure 1. Enterprise Packet Voice Market...2 Why IP telephony?... 3 Figure 2. Challenges of IP Telephony Deployments...

More information

Requirements of Voice in an IP Internetwork

Requirements of Voice in an IP Internetwork Requirements of Voice in an IP Internetwork Real-Time Voice in a Best-Effort IP Internetwork This topic lists problems associated with implementation of real-time voice traffic in a best-effort IP internetwork.

More information

network infrastructure: getting started with VoIP

network infrastructure: getting started with VoIP hp procurve networking business may 2003 network infrastructure: getting started with VoIP technical brief table of contents introduction 2 network optimization for VoIP 2 bandwidth provisioning 3 end-to-end

More information

ProCurve and Wired and Wireless Voice-over-IP Applications

ProCurve and Wired and Wireless Voice-over-IP Applications ProCurve and Wired and Wireless Voice-over-IP Applications Andy Rawll Global Product Manager Avaya HP ProCurve & Avaya IP Telephony Appliances 2 Overview Benefits to Business of ProCurve for VoIP Applications!

More information

Is Your Network Ready for VoIP? > White Paper

Is Your Network Ready for VoIP? > White Paper > White Paper Tough Questions, Honest Answers For many years, voice over IP (VoIP) has held the promise of enabling the next generation of voice communications within the enterprise. Unfortunately, its

More information

VoIP / SIP Planning and Disclosure

VoIP / SIP Planning and Disclosure VoIP / SIP Planning and Disclosure Voice over internet protocol (VoIP) and session initiation protocol (SIP) technologies are the telecommunication industry s leading commodity due to its cost savings

More information

12 Quality of Service (QoS)

12 Quality of Service (QoS) Burapha University ก Department of Computer Science 12 Quality of Service (QoS) Quality of Service Best Effort, Integrated Service, Differentiated Service Factors that affect the QoS Ver. 0.1 :, prajaks@buu.ac.th

More information

SIP Trunking Guide: Get More For Your Money 07/17/2014 WHITE PAPER

SIP Trunking Guide: Get More For Your Money 07/17/2014 WHITE PAPER SIP Trunking Guide: Get More For Your Money 07/17/2014 WHITE PAPER Overview SIP trunking is the most affordable and flexible way to connect an IP PBX to the Public Switched Telephone Network (PSTN). SIP

More information

Agilent Technologies Performing Pre-VoIP Network Assessments. Application Note 1402

Agilent Technologies Performing Pre-VoIP Network Assessments. Application Note 1402 Agilent Technologies Performing Pre-VoIP Network Assessments Application Note 1402 Issues with VoIP Network Performance Voice is more than just an IP network application. It is a fundamental business and

More information

Allstream Converged IP Telephony

Allstream Converged IP Telephony Allstream Converged IP Telephony SIP Trunking Solution An Allstream White Paper 1 Table of contents Introduction 1 Traditional trunking: a quick overview 1 SIP trunking: a quick overview 1 Why SIP trunking?

More information

Clearing the Way for VoIP

Clearing the Way for VoIP Gen2 Ventures White Paper Clearing the Way for VoIP An Alternative to Expensive WAN Upgrades Executive Overview Enterprises have traditionally maintained separate networks for their voice and data traffic.

More information

T H E TOLLY. No. 202151 October 2002. NetVanta 3200 Access Router versus Cisco Systems, Inc. 1720/1751V Competitive Performance Evaluation

T H E TOLLY. No. 202151 October 2002. NetVanta 3200 Access Router versus Cisco Systems, Inc. 1720/1751V Competitive Performance Evaluation No. 202151 October 2002 NetVanta 3200 Access Router versus Systems, Inc. Competitive Performance Evaluation Premise: Customers who deploy branch office routers have come to expect line rate throughput

More information

Toll-bypass Long Distance Calling... 1. What Is VOIP?... 2. Immediate Cost Savings... 3. Applications... 3. Business Quality Voice...

Toll-bypass Long Distance Calling... 1. What Is VOIP?... 2. Immediate Cost Savings... 3. Applications... 3. Business Quality Voice... telephony internet access remote access modems Content Toll-bypass Long Distance Calling... 1 What Is VOIP?... 2 That Was Then... This is Now... Immediate Cost Savings... 3 Applications... 3 Office-to-office

More information

Combining Voice over IP with Policy-Based Quality of Service

Combining Voice over IP with Policy-Based Quality of Service TechBrief Extreme Networks Introduction Combining Voice over IP with Policy-Based Quality of Service Businesses have traditionally maintained separate voice and data networks. A key reason for this is

More information

ProCurve Networking by HP. More from your network

ProCurve Networking by HP. More from your network ProCurve Networking by HP More from your network More from your network more value, more security, more open, more intelligent, more support, more reliable, and more experience ProCurve Networking helps

More information

1. Public Switched Telephone Networks vs. Internet Protocol Networks

1. Public Switched Telephone Networks vs. Internet Protocol Networks Internet Protocol (IP)/Intelligent Network (IN) Integration Tutorial Definition Internet telephony switches enable voice calls between the public switched telephone network (PSTN) and Internet protocol

More information

Voice over IP is Transforming Business Communications

Voice over IP is Transforming Business Communications White Paper Voice over IP is Transforming Business Communications Voice over IP (VoIP) is changing the world of telecommunications. It entails the transmission of voice calls over data networks that support

More information

Voice over IP Networks: Ensuring quality through proactive link management

Voice over IP Networks: Ensuring quality through proactive link management White Paper Voice over IP Networks: Ensuring quality through proactive link management Build Smarter Networks Table of Contents 1. Executive summary... 3 2. Overview of the problem... 3 3. Connectivity

More information

VoIP Conformance Labs

VoIP Conformance Labs VoIP acceptance, VoIP connectivity, VoIP conformance, VoIP Approval, SIP acceptance, SIP connectivity, SIP conformance, SIP Approval, IMS acceptance, IMS connectivity, IMS conformance, IMS Approval, VoIP

More information

SalesLogix 6.1. Best Software. VoIP OVERVIEW. Summary Report. 1 Info~Tech Vendor Evaluations VoIP

SalesLogix 6.1. Best Software. VoIP OVERVIEW. Summary Report. 1 Info~Tech Vendor Evaluations VoIP VoIP Summary Report OVERVIEW Voice over IP technology (VoIP) is hot. Info-Tech Research Group s 2005 IT Priorities report indicates that 23% of mid-sized enterprises have already invested in VoIP. Traditional

More information

Global Headquarters: 5 Speen Street Framingham, MA 01701 USA P.508.872.8200 F.508.935.4015 www.idc.com

Global Headquarters: 5 Speen Street Framingham, MA 01701 USA P.508.872.8200 F.508.935.4015 www.idc.com WHITE PAPER Converged Business Networks: Simplifying Network Complexity Sponsored by: Level 3 Melanie Posey November 2010 Global Headquarters: 5 Speen Street Framingham, MA 01701 USA P.508.872.8200 F.508.935.4015

More information

Achieving High Quality Voiceover-IP Across WANs With Talari Networks APN Technology

Achieving High Quality Voiceover-IP Across WANs With Talari Networks APN Technology Achieving High Quality Voiceover-IP Across WANs With Talari Networks APN Technology A Talari Networks Application Note 2012 Talari Networks / www.talari.com Enterprise-class Voice-over-IP Challenges In

More information

VoIP Solutions Guide Everything You Need to Know

VoIP Solutions Guide Everything You Need to Know VoIP Solutions Guide Everything You Need to Know Simplify, Save, Scale VoIP: The Next Generation Phone Service Ready to Adopt VoIP? 10 Things You Need to Know 1. What are my phone system options? Simplify,

More information

Network Connection Considerations for Microsoft Response Point 1.0 Service Pack 2

Network Connection Considerations for Microsoft Response Point 1.0 Service Pack 2 Network Connection Considerations for Microsoft Response Point 1.0 Service Pack 2 Updated: February 2009 Microsoft Response Point is a small-business phone solution that is designed to be easy to use and

More information

Is Your Network Ready For IP Telephony?

Is Your Network Ready For IP Telephony? WHITE PAPER Is Your Network Ready For IP Telephony? Straight facts about IP telephony planning and deployment 1. Introduction Enterprises are rapidly adopting IP telephony for cost savings, productivity

More information

Key Findings. Recommendations. Overview. What You Need to Know. 1 of 5 10/11/2010 9:44 AM

Key Findings. Recommendations. Overview. What You Need to Know. 1 of 5 10/11/2010 9:44 AM 1 of 5 10/11/2010 9:44 AM 27 April 2010 Mark Fabbi Gartner RAS Core Research Note G00200313 With the completion of the 3Com acquisition, HP will become a formidable competitor across the entire enterprise

More information

IP videoconferencing solution with ProCurve switches and Tandberg terminals

IP videoconferencing solution with ProCurve switches and Tandberg terminals An HP ProCurve Networking Application Note IP videoconferencing solution with ProCurve switches and Tandberg terminals Contents 1. Introduction... 3 2. Architecture... 3 3. Videoconferencing traffic and

More information

Verifying Metro Ethernet Quality of Service

Verifying Metro Ethernet Quality of Service White Paper Verifying Metro Ethernet Quality of Service Introduction Metro Ethernet is widely accepted as a cost-effective, resilient, and scalable switching and transport technology. Used for delivery

More information

GARTNER REPORT: SIP TRUNKING

GARTNER REPORT: SIP TRUNKING GARTNER REPORT: SIP TRUNKING SIP Trunking Slashes U.S. Telecom Expenses by Up to 50%. SUMMARY Network architects and procurement managers can leverage SIP trunking services to slash enterprise telecom

More information

WHITEPAPER. Quality of Service Testing in the VoIP Environment

WHITEPAPER. Quality of Service Testing in the VoIP Environment Quality of Service Testing in the VoIP Environment March 2005 In recent years, the business world has reaped tremendous benefits from the many exciting products and applications made possible by the marriage

More information

Re-establishing and improving the experimental VoIP link with the University of Namibia: A Case Study

Re-establishing and improving the experimental VoIP link with the University of Namibia: A Case Study Re-establishing and improving the experimental VoIP link with the University of Namibia: A Case Study R. M. Ngandu, A. Terzoli & M. Tsietsi Department of Computer Science, Rhodes University September,

More information

Convergence: The Foundation for Unified Communications

Convergence: The Foundation for Unified Communications Convergence: The Foundation for Unified Communications Authored by: Anthony Cimorelli, Senior Product Marketing Manager Onofrio Norm Schillaci, Principal Sales Engineer Michelle Soltesz, Director, Marketing

More information

Best Effort gets Better with MPLS. Superior network flexibility and resiliency at a lower cost with support for voice, video and future applications

Best Effort gets Better with MPLS. Superior network flexibility and resiliency at a lower cost with support for voice, video and future applications Best Effort gets Better with MPLS Superior network flexibility and resiliency at a lower cost with support for voice, video and future applications A White Paper on Multiprotocol Label Switching October,

More information

Deploying the ShoreTel IP Telephony Solution with a Meru Networks Wireless LAN

Deploying the ShoreTel IP Telephony Solution with a Meru Networks Wireless LAN Deploying the ShoreTel IP Telephony Solution with a Meru Networks Wireless LAN Copyright 2005, Meru Networks, Inc. This document is an unpublished work protected by the United States copyright laws and

More information

Packetized Telephony Networks

Packetized Telephony Networks Packetized Telephony Networks Benefits of Packet Telephony Networks Traditionally, the potential savings on long-distance costs was the driving force behind the migration to converged voice and data networks.

More information

Five Hosted VoIP Features

Five Hosted VoIP Features Five Hosted VoIP Features WHITEPAPER: three FUNDAMENTALS for consistently good voip call quality www.megapath.com Every week, businesses across the country are converting to Voice over IP (VoIP) communication

More information

Voice over IP Technologies

Voice over IP Technologies Voice over IP Technologies Voice Over IP Overview VoIP is an emerging technology that allows voice calls to be made over an IP network. Vendors have been pushing VoIP for a few years, but many potential

More information

Cisco Smart Business Communications System: A New Way for Small Business to Communicate

Cisco Smart Business Communications System: A New Way for Small Business to Communicate Cisco Smart Business Communications System: A New Way for Small Business to Communicate Cisco Smart Business Communications System (SBCS) is a complete system of voice, data, video, and wireless networking

More information

Contents Introduction Why Fax over IP? How Real-time Fax over IP works Implementation with MessagePlus/Open Summary. About this document

Contents Introduction Why Fax over IP? How Real-time Fax over IP works Implementation with MessagePlus/Open Summary. About this document Fax over IP Contents Introduction Why Fax over IP? How Real-time Fax over IP works Implementation with MessagePlus/Open Summary About this document This document describes how Fax over IP works in general

More information

How Does Fax over IP Work?

How Does Fax over IP Work? Small Logo How Does Fax over IP Work? A Discussion of the T.30 and T.38 Protocols and the Dialogic Brooktrout Fax Products Executive Summary This white paper briefly describes the T.30 and T.38 protocols,

More information

Terms VON. VoIP LAN WAN CODEC

Terms VON. VoIP LAN WAN CODEC VON Voice Over the Net. Voice transmitted over the Internet. That is the technical definition. Prescient Worldwide s product, called VON, means Voice Over Network as in ANY network, whether a client s

More information

SIP Trunking: A new voice in communications service

SIP Trunking: A new voice in communications service Charter Business : White paper SIP Trunking: A new voice in communications service WHITE PAPER With the rise of next-generation technology, business customers have more options than ever from providers

More information

IP TELEPHONY TAKE YOUR BUSINESS COMMUNICATIONS TO THE NEXT LEVEL

IP TELEPHONY TAKE YOUR BUSINESS COMMUNICATIONS TO THE NEXT LEVEL IP TELEPHONY TAKE YOUR BUSINESS COMMUNICATIONS TO THE NEXT LEVEL Executive Summary The rising popularity of IP Telephony in recent years demonstrates that it has become a highly functional, affordable

More information

The Business Value of SIP Trunking

The Business Value of SIP Trunking July 2013 US$39.00 S P E C I A L R E P O R T The Business Value of SIP Trunking By Khali Henderson Editor-in-Chief, Channel Partners COMMUNICATIONS Table of Contents Introduction... 3 What Is SIP Trunking?...

More information

VoIP Bandwidth Considerations - design decisions

VoIP Bandwidth Considerations - design decisions VoIP Bandwidth Considerations - design decisions When calculating the bandwidth requirements for a VoIP implementation the two main protocols are: a signalling protocol such as SIP, H.323, SCCP, IAX or

More information

White Paper: Performance of Host-based Media Processing

White Paper: Performance of Host-based Media Processing White Paper: Performance of Host-based Media Processing The viability of host-based software in providing media processing capabilities continues to expand the possibilities for voice application development.

More information

Troubleshooting Common Issues in VoIP

Troubleshooting Common Issues in VoIP Troubleshooting Common Issues in VoIP 2014, SolarWinds Worldwide, LLC. All rights reserved. Voice over Internet Protocol (VoIP) Introduction Voice over IP, or VoIP, refers to the delivery of voice and

More information

Best Practices for deploying unified communications together with SIP trunking connectivity

Best Practices for deploying unified communications together with SIP trunking connectivity An Allstream White Paper Best Practices for deploying unified communications together with SIP trunking connectivity An Allstream White Paper 1 Table of contents Correct identification and maximization

More information

Creating Business-Class VoIP: Ensuring End-to-End Service Quality and Performance in a Multi-Vendor Environment. A Stratecast Whitepaper

Creating Business-Class VoIP: Ensuring End-to-End Service Quality and Performance in a Multi-Vendor Environment. A Stratecast Whitepaper : Ensuring End-to-End Service Quality and Performance in a Multi-Vendor Environment A Executive Summary Creating Business-Class VoIP Traditional voice services have always been reliable, available, and

More information

PSTN IXC PSTN LEC PSTN LEC STP STP. Class 4. Class 4 SCP SCP STP. Switch. Switch STP. Signaling Media. Class 5. Class 5. Switch.

PSTN IXC PSTN LEC PSTN LEC STP STP. Class 4. Class 4 SCP SCP STP. Switch. Switch STP. Signaling Media. Class 5. Class 5. Switch. As we enter the 21st century, we are experiencing a telecommunications revolution. From a technological perspective, the distinction between voice information and other kinds of data is blurring as circuit-switched

More information

Network Considerations for IP Video

Network Considerations for IP Video Network Considerations for IP Video H.323 is an ITU standard for transmitting voice and video using Internet Protocol (IP). It differs from many other typical IP based applications in that it is a real-time

More information

Goal We want to know. Introduction. What is VoIP? Carrier Grade VoIP. What is Meant by Carrier-Grade? What is Meant by VoIP? Why VoIP?

Goal We want to know. Introduction. What is VoIP? Carrier Grade VoIP. What is Meant by Carrier-Grade? What is Meant by VoIP? Why VoIP? Goal We want to know Introduction What is Meant by Carrier-Grade? What is Meant by VoIP? Why VoIP? VoIP Challenges 2 Carrier Grade VoIP Carrier grade Extremely high availability 99.999% reliability (high

More information

IP Telephony Basics. Part of The Technology Overview Series for Small and Medium Businesses

IP Telephony Basics. Part of The Technology Overview Series for Small and Medium Businesses IP Telephony Basics Part of The Technology Overview Series for Small and Medium Businesses What is IP Telephony? IP Telephony uses the Internet Protocol (IP) to transmit voice or FAX traffic over a public

More information

Abstract. Avaya Solution & Interoperability Test Lab

Abstract. Avaya Solution & Interoperability Test Lab Avaya Solution & Interoperability Test Lab Application Notes for Configuring a Small to Medium Size Business VoIP and Data Network Solution Consisting of HP ProCurve Networking Switches and an Avaya Telephony

More information

Planning an IP Network for Voice and Data

Planning an IP Network for Voice and Data A by NEC Unified Solutions, Inc. Planning an IP Network for Voice and Data Contents 1 Introduction...3 2 Voice Quality Requirements...3 3 Codecs...3 4 Network Layout...5 5 Planning Capacity...6 5.1 Step

More information

Planning Networks for VOIP. An Introduction

Planning Networks for VOIP. An Introduction Planning Networks for VOIP An Introduction Planning Networks for VOIP Page 2/10 Contents 1 Introduction...3 2 Voice Quality Requirements...3 3 Codecs...4 4 Network Layout...5 5 Planning Capacity...6 5.1

More information

Protecting the Extended Enterprise Network Security Strategies and Solutions from ProCurve Networking

Protecting the Extended Enterprise Network Security Strategies and Solutions from ProCurve Networking ProCurve Networking by HP Protecting the Extended Enterprise Network Security Strategies and Solutions from ProCurve Networking Introduction... 2 Today s Network Security Landscape... 2 Accessibility...

More information

IP Implementation in Private Branch Exchanges From 9:30 a.m until 4:30 p.m (7 hrs./day) 5 days / week

IP Implementation in Private Branch Exchanges From 9:30 a.m until 4:30 p.m (7 hrs./day) 5 days / week Course Title: No. of Hours: IP Implementation in Private Branch Exchanges From 9:30 a.m until 4:30 p.m (7 hrs./day) 5 days / week 1 Course Duration: 3 Months (12weeks) No. Of Hours: 7 Hrs./Day- 5 days/week.

More information

business phone systems

business phone systems SDN Communications business phone systems Combine and streamline your communication tools www.sdncommunications.com avaya phone systems improve business agility - reduce costs - increase productivity If

More information

Is SIP Trunking on Your Horizon? Sue Bradshaw, Technology Writer

Is SIP Trunking on Your Horizon? Sue Bradshaw, Technology Writer White Paper Is SIP Trunking on Your Horizon? Sue Bradshaw, Technology Writer This white paper from Integrated Research discusses how understanding your call flows, PSTN trunk capacity and usage today will

More information

HP Networking and Aastra

HP Networking and Aastra HP Networking and Aastra Solution whitepaper Table of contents Executive Summary... 2 Introduction... 3 HP Networking and Aastra: A true alliance... 4 Commitment to open standards... 4 Session Initiation

More information

Latency on a Switched Ethernet Network

Latency on a Switched Ethernet Network Application Note 8 Latency on a Switched Ethernet Network Introduction: This document serves to explain the sources of latency on a switched Ethernet network and describe how to calculate cumulative latency

More information

ehealth and VoIP Overview

ehealth and VoIP Overview ehealth and VoIP Overview Voice over IP (VoIP) configurations can be very complex. Your network could contain a variety of devices, applications, and configuration capabilities to support voice traffic.

More information

Contents. Specialty Answering Service. All rights reserved.

Contents. Specialty Answering Service. All rights reserved. Contents 1 Introduction... 2 2 PBX... 3 3 IP PBX... 4 3.1 How It Works... 4 3.2 Functions of IP PBX... 5 3.3 Benefits of IP PBX... 5 4 Evolution of IP PBX... 6 4.1 Fuelling Factors... 6 4.1.1 Demands from

More information

MITEL. NetSolutions. Flat Rate MPLS VPN

MITEL. NetSolutions. Flat Rate MPLS VPN MITEL NetSolutions Flat Rate MPLS VPN A Comprehensive, Intelligent Network-based Solution Businesses today demand an ever-evolving list of requirements of their networks. From connecting branch locations

More information

Ten Steps to a Successful Business Phone System Implementation. By Clare Kaufman

Ten Steps to a Successful Business Phone System Implementation. By Clare Kaufman Ten Steps to a Successful Business Phone System Implementation By Clare Kaufman Contents Introduction...2 Planning a Business Phone Solution...2 1. Define business requirement...3. 2. Line Up Technical

More information

Voice, Video and Data Convergence > A best-practice approach for transitioning your network infrastructure. White Paper

Voice, Video and Data Convergence > A best-practice approach for transitioning your network infrastructure. White Paper > A best-practice approach for transitioning your network infrastructure White Paper The business benefits of network convergence are clear: fast, dependable, real-time communication, unprecedented information

More information

Application Note. Pre-Deployment and Network Readiness Assessment Is Essential. Types of VoIP Performance Problems. Contents

Application Note. Pre-Deployment and Network Readiness Assessment Is Essential. Types of VoIP Performance Problems. Contents Title Six Steps To Getting Your Network Ready For Voice Over IP Date January 2005 Overview This provides enterprise network managers with a six step methodology, including predeployment testing and network

More information

CISCO IOS IP SERVICE LEVEL AGREEMENTS: ASSURE THE DELIVERY OF IP SERVICES AND APPLICATIONS

CISCO IOS IP SERVICE LEVEL AGREEMENTS: ASSURE THE DELIVERY OF IP SERVICES AND APPLICATIONS CISCO IOS IP SERVICE LEVEL AGREEMENTS: ASSURE THE DELIVERY OF IP SERVICES AND APPLICATIONS INTERNET TECHNOLOGIES DIVISION JANUARY 2005 1 Cisco IOS IP Service Level Agreements Presentation Agenda Overview

More information

HP ProCurve Networking. Networking solutions for small and growing businesses

HP ProCurve Networking. Networking solutions for small and growing businesses HP ProCurve Networking Networking solutions for small and growing businesses Contents A network you can depend on....................................1 Essential network connectivity....................................2

More information

Knowledge Is Power: Do what s best for the client.

Knowledge Is Power: Do what s best for the client. Knowledge Is Power: Do what s best for the client. 1. Understanding Voice and Data Differences Even when they are carried on the same network, voice traffic and data traffic cannot be handled the same

More information

QoS issues in Voice over IP

QoS issues in Voice over IP COMP9333 Advance Computer Networks Mini Conference QoS issues in Voice over IP Student ID: 3058224 Student ID: 3043237 Student ID: 3036281 Student ID: 3025715 QoS issues in Voice over IP Abstract: This

More information

Whitepaper. A Guide to Ensuring Perfect VoIP Calls. www.sevone.com blog.sevone.com info@sevone.com

Whitepaper. A Guide to Ensuring Perfect VoIP Calls. www.sevone.com blog.sevone.com info@sevone.com A Guide to Ensuring Perfect VoIP Calls VoIP service must equal that of landlines in order to be acceptable to both hosts and consumers. The variables that affect VoIP service are numerous and include:

More information

An Introduction to SIP

An Introduction to SIP SIP trunking, simply put, is a way for you to accomplish something that you already do, for less money, with equal or better quality, and with greater functionality. A Guide to SIP V4 An Introduction to

More information

Turn Your Cloud Exchange Network Into a Network-as-a-Service

Turn Your Cloud Exchange Network Into a Network-as-a-Service Turn Your Cloud Exchange Network Into a Network-as-a-Service Use software-defined networking to make your Wide Area Network into a Revenue Generating Asset Table of Contents Introduction.....................................

More information

Business case for VoIP Readiness Network Assessment

Business case for VoIP Readiness Network Assessment Business case for VoIP Readiness Network Assessment Table of contents Overview... 2 Different approaches to pre-deployment assessment:.......... 2 Other considerations for VoIP pre-deployment... 3 The

More information

Using & Offering Wholesale Ethernet Network and Operational Considerations

Using & Offering Wholesale Ethernet Network and Operational Considerations White Paper Using and Offering Wholesale Ethernet Using & Offering Wholesale Ethernet Network and Operational Considerations Introduction Business services customers are continuing to migrate to Carrier

More information

SDN in the Campus LAN Offers Immediate Benefits

SDN in the Campus LAN Offers Immediate Benefits December 23, 2013 Market Advisory Report Mike Fratto, Principal Analyst, Enterprise Networking and Data Center Technology Key Takeaways Mike Fratto Current Analysis Principal Analyst campus LAN offers

More information

Five Steps to Ensuring a Successful VoIP Migration. By Mike Perry, incontact Vice President, Network Operations

Five Steps to Ensuring a Successful VoIP Migration. By Mike Perry, incontact Vice President, Network Operations Five Steps to Ensuring a Successful VoIP Migration By Mike Perry, incontact Vice President, Network Operations Voice over IP (VoIP) has arrived and is here to stay. Many contact centers are realizing the

More information

Enabling Modern Telecommunications Services via Internet Protocol and Satellite Technology Presented to PTC'04, Honolulu, Hawaii, USA

Enabling Modern Telecommunications Services via Internet Protocol and Satellite Technology Presented to PTC'04, Honolulu, Hawaii, USA CASE STUDY Enabling Modern Telecommunications Services via Internet Protocol and Satellite Technology Presented to PTC'04, Honolulu, Hawaii, USA Stephen Yablonski and Steven Spreizer Globecomm Systems,

More information

Cisco Satellite Services Platform Delivering Managed Services over Satellite

Cisco Satellite Services Platform Delivering Managed Services over Satellite Solution Overview Cisco Satellite Services Platform Delivering Managed Services over Satellite With the increase in available bandwidth from the launch of high-throughput satellites, satellite service

More information

Video Bandwidth Will MPEG Video Kill Your Network?

Video Bandwidth Will MPEG Video Kill Your Network? Will MPEG Video Kill Your Network? The thought that more bandwidth will cure network ills is an illusion like the thought that more money will ensure human happiness. Certainly more is better. But when

More information

INSERT COMPANY LOGO HERE

INSERT COMPANY LOGO HERE 2013 2014 INSERT COMPANY LOGO HERE 2014 Global 2013 North Unified American Communications SSL Certificate Infrastructure Technology Product Innovation Leadership Leadership Award Award Technology Innovation

More information

ProCurve and Mitel Convergence Solution Brief

ProCurve and Mitel Convergence Solution Brief ProCurve Networking ProCurve and Mitel Convergence Solution Brief Introduction...2 ProCurve and Mitel: A true partnership...2 Driving technological developments...2 Voice over Wi-Fi...4 Supporting customers...4

More information

RTEs Must Anticipate New Network Demands

RTEs Must Anticipate New Network Demands Strategic Planning, W. Clark Research Note 13 March 2003 RTEs Must Anticipate New Network Demands Real-time enterprise requirements will change key characteristics of network traffic as usage patterns

More information

Evaluating Wireless Broadband Gateways for Deployment by Service Provider Customers

Evaluating Wireless Broadband Gateways for Deployment by Service Provider Customers Evaluating Wireless Broadband Gateways for Deployment by Service Provider Customers Overview A leading provider of voice, video, and data services to the residential and businesses communities designed

More information

HP ProCurve Networking certification for resellers. Place yourself above the competition

HP ProCurve Networking certification for resellers. Place yourself above the competition HP ProCurve Networking certification for resellers Place yourself above the competition HP ProCurve Certified Professional program tracks Highest certification HP ProCurve Program Sales certifications

More information

Integrate VoIP with your existing network

Integrate VoIP with your existing network Integrate VoIP with your existing network As organisations increasingly recognise and require the benefits voice over Internet Protocol (VoIP) offers, they stop asking "Why?" and start asking "How?". A

More information

INTRODUCTION TO VOICE OVER IP

INTRODUCTION TO VOICE OVER IP 52-30-20 DATA COMMUNICATIONS MANAGEMENT INTRODUCTION TO VOICE OVER IP Gilbert Held INSIDE Equipment Utilization; VoIP Gateway; Router with Voice Modules; IP Gateway; Latency; Delay Components; Encoding;

More information

2- Technical Training (9 weeks) 3- Applied Project (3 weeks) 4- On Job Training (OJT) (4 weeks)

2- Technical Training (9 weeks) 3- Applied Project (3 weeks) 4- On Job Training (OJT) (4 weeks) Course Title: Prerequisites: Training Program (5 months) IP Implementation in Private Branch Exchanges Must fresh graduates Communication/Electronics Engineers" 1- Soft Skills Training (4 weeks) 1. Communication

More information

Data Center Networking Designing Today s Data Center

Data Center Networking Designing Today s Data Center Data Center Networking Designing Today s Data Center There is nothing more important than our customers. Data Center Networking Designing Today s Data Center Executive Summary Demand for application availability

More information

White Paper: Voice Over IP Networks

White Paper: Voice Over IP Networks FREE FREE One One Hour Hour VoIPonline VoIPonline Seminar TM Seminar TM For additional information contact: Terry Shugart - tshugart@analogic.com http://www.analogic.com/cti TEL: 978-977-3000 FAX: 978-977-6813

More information

WHITEPAPER. VPLS for Any-to-Any Ethernet Connectivity: When Simplicity & Control Matter

WHITEPAPER. VPLS for Any-to-Any Ethernet Connectivity: When Simplicity & Control Matter WHITEPAPER VPLS for Any-to-Any Ethernet Connectivity: When Simplicity & Control Matter The Holy Grail: Achieving Simplicity and Control in the IT Infrastructure Today s Information Technology decision-makers

More information

IP Telephony Deployment Models

IP Telephony Deployment Models CHAPTER 2 Sections in this chapter address the following topics: Single Site, page 2-1 Multisite Implementation with Distributed Call Processing, page 2-3 Design Considerations for Section 508 Conformance,

More information

TESTING REPORT: Genesys IP Media exchange

TESTING REPORT: Genesys IP Media exchange TESTING REPORT: Genesys IP Media exchange Executive Summary: The Converged Communication Industry s Premier ing Service Date of s: November, 2004 Vendor: Genesys Telecommunications Laboratories Daly City,

More information

The Open Systems Approach to Voice Over IP A Practical and Future-Proof Way to Embrace VoIP Technology

The Open Systems Approach to Voice Over IP A Practical and Future-Proof Way to Embrace VoIP Technology An Artisoft White Paper April 2001 The Open Systems Approach to Voice Over IP A Practical and Future-Proof Way to Embrace VoIP Technology 2001 by Artisoft, Inc. Artisoft and TeleVantage are registered

More information

Quality of Service (QoS) and Quality of Experience (QoE) VoiceCon Fall 2008

Quality of Service (QoS) and Quality of Experience (QoE) VoiceCon Fall 2008 Quality of Service (QoS) and Quality of Experience (QoE) VoiceCon Fall 2008 John Bartlett NetForecast, Inc. john@netforecast.com www.netforecast.com VoIP Deployment Realities VoIP is not just another application

More information