1. Public Switched Telephone Networks vs. Internet Protocol Networks

Size: px
Start display at page:

Download "1. Public Switched Telephone Networks vs. Internet Protocol Networks"

Transcription

1 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 (IP) networks. However, because they lack signaling system 7 (SS7) transaction capabilities, Internet telephony switches cannot access PSTN databases which support intelligent network (IN) services, such as local number portability (LNP) and toll-free (800) databases. The integration of Internet protocol and intelligent networks is an important step in the convergence of voice and data networks. Tutorial Overview This tutorial suggests a possible evolution from existing Internet telephony switch (ITS) technology to an SS7-enabled Internet telephony service switching point (IT-SSP) with intelligent network service capabilities. An overview of common terminology and standards is provided along with examples of enhanced service call flows. Topics 1. Public Switched Telephone Network vs. Internet Protocol Networks 2. The Internet Telephony Switch 3. The Internet Telephony Signaling Point 4. The IP to SS7 Network Gateway 5. The Internet Telephony Service Switching Point 6. Future of Internet Telephony in the PSTN 7. Self-Test 8. Acronym Guide 9. Related Products and Services (Web TecPreviews) 1. Public Switched Telephone Networks vs. Internet Protocol Networks The public switched telephone network provides users with dedicated, end-to-end circuit connections for the duration of each call. Circuits are reserved between the originating switch, tandem switches (if any), and the terminating switch based on the called party number. The PSTN also provides access to intelligent network services using the SS7 protocol. SS7 is used for basic call setup, management, and tear down and to query databases that support intelligent network services such as local number portability, mobile subscriber authentication and roaming, virtual private networking, and toll-free (800) service. Unlike the circuit-switched PSTN, packet-switched IP networks provide shared, virtual circuit connections between users. Bandwidth is dynamically allocated for improved utilization of network capacity. IP packets are routed to the destination IP address contained within the header of each packet. Packets may travel over separate network paths before arriving at their final destination for reassembly and resequencing. The transmission speed between any two users can change dramatically based on the dynamic number of users sharing the common transmission medium, their bandwidth requirements, the capacity of the transmission medium, and the efficiency of the network routing and design. 1 of 13

2 Voice and Video over IP In November 1996, the International Telecommunication Union (ITU) Telecommunication Standardization Sector (ITU-T) ratified the H.323 specification that defines how delay-sensitive voice and video traffic is transported over local area networks (LANs). The ITU-T warns that operating H.323 terminals over multiple LAN segments (such as the Internet) may result in poor performance due to the lack of quality-of-service (QoS) guarantees. Until new IP signaling protocols, such as the resource reservation protocol (RSVP), are ratified and implemented in network routers, it is not possible to reserve end-to-end connections over IP networks to guarantee a quality of service equivalent to the PSTN. In the interim, vendors are selling H.323 compatible devices primarily for use over private intranets (rather than the public Internet) where quality-of-service can be controlled. In the Internet, congestion resulting from inadequate bandwidth leads to long delays in the delivery of packets. For voice data, packets that are lost or discarded result in gaps, silence, and clipping in the audio playback. H.323 gateways interface IP networks to the PSTN. Gateways digitize and compress voice calls from the PSTN into IP packets for routing to another gateway (for forwarding to the PSTN) or to an H.323 terminal, such as a PC equipped with H.323 software, a microphone, and speakers. H.323 terminals support the encoding/decoding and packetization/sequencing of information exchanged with other H.323 terminals or gateways. Figure 1 shows the interconnection of the PSTN to H.323 gateways and H.323 terminals. Figure 1: H.323 Gateways/Terminals to PSTN Interconnection Gateways transmit call signaling information to the PSTN using multifrequency (MF) tones, ISDN D-channel signaling, or other forms of signaling. The gateway may also provide enhanced call-processing capabilities such as call prompting and voice recognition. 2. The Internet Telephony Switch The first generation of internet telephony switch (ITS) achieves a limited integration between the PSTN and IP networks. Calls between the PSTN and IP network are supported but intelligent network capabilities, such as toll-free calling and number portability, are unavailable because of the lack of SS7 support in the ITS. The ITS consists of both gateways and gatekeepers (see Figure 2). Figure 2: Internet Telephony Switch 2 of 13 8/26/98 2:51 PM

3 Gatekeepers use the signaling information provided by H.323 gateways or H.323 terminals to provide directory services. The gatekeeper determines the communication path between the originating and terminating gateways and the PSTN using originating/terminating IP addresses and/or called/calling telephone numbers. To provide PSTN/IP routing, gatekeepers maintain a database of remote gatekeeper IP addresses and associated PSTN dialing plan routing information. PSTN to IP to PSTN Call Flow The following example traces a sample call flow which originates in the PSTN, traverses an IP network, and terminates back in the PSTN (see Figure 3): Figure 3: PSTN to IP to PSTN Call Flow 1. An Internet telephony service subscriber dials an access number provided by the Internet telephony service provider. 2. The call is routed by the PSTN to the "access" Internet telephony switch. 3. The gateway plays an announcement requesting that the subscriber enter the destination telephone number to be called. The destination digit information is sent to the gatekeeper. 4. The gatekeeper determines a destination gatekeeper IP address based on the destination digit information. An IP packet requesting the availability status of the destination gateway is sent to the destination gatekeeper. 5. The destination gatekeeper responds to the request by providing destination gateway availability and IP address information. The originating gatekeeper then transfers this information to the originating gateway. 6. The originating gateway sets up a virtual circuit to the destination gateway. This circuit is identified by a call reference variable (CRV) that will be used by both gateways for the duration of the call to identify all IP packets associated with this particular call. 7. The destination gateway selects an outgoing PSTN voice trunk and signals to the PSTN switch to attempt to setup a call to the dialed telephone number. 8. If the PSTN switch signals that the call setup is successful and the called party has answered, IP 3 of 13 8/26/98 2:51 PM

4 signaling messages are relayed to the originating gatekeeper. The gatekeeper then signals the originating gateway, which in turn signals the originating PSTN switch to indicate that the call is now completed. In the IP network, voice packets are exchanged between the gateways for the duration of the call. H.323 Terminal to PSTN Call Flow The following example traces a sample call flow which originates from an IP-based H.323 terminal (e.g., a personal computer) and terminates in the PSTN (see Figure 4): Figure 4: H.323 Terminal to PSTN Call Flow 1. An Internet telephony subscriber initiates a Internet telephony call setup procedure at an H.323 terminal (e.g., a PC). The H.323 terminal sends an IP packet specifying the destination digits information to a preselected gatekeeper. 2. The call scenario from this point onward is similar to steps four through eight described in the PSTN to IP to PSTN call flow (replace "originating gateway" with "originating terminal"). PSTN to H.323 Terminal Call Flow A sample call flow that starts from the PSTN and terminates at an IP-based H.323 terminal is described in Figure 5: Figure 5: PSTN to H.323 Terminal Call Flow 1. An Internet telephony subscriber dials an access number that has provided by the Internet telephony service provider. 2. The call is routed by the PSTN to the "access" Internet telephony switch. 3. The gateway plays an announcement requesting that the subscriber enter the destination number to be called. (In this case, the telephone number is assigned to an H.323 terminal.) The collected destination digit information is sent in a call setup request message to the gatekeeper. 4. The gatekeeper determines a destination gatekeeper IP address based on the destination digit information. An IP packet requesting the availability status for the destination H.323 terminal is sent to the destination gatekeeper. 4 of 13 8/26/98 2:51 PM

5 5. The destination gatekeeper responds to the request by providing the destination terminal availability status and IP address information to the originating gateway. 6. The originating gateway sets up a virtual circuit to the destination H.323 terminal. This circuit is identified by a call-reference variable that will be used by both the originating gateway and the H.323 terminal for the duration of the call to identify all IP packets associated with this particular call. 7. If the H.323 terminal indicates that call setup is successful and the called party has answered, IP signaling messages are sent to the originating gatekeeper, which then signals the originating gateway. The originating gateway signals the originating PSTN switch to indicate that the call is now completed. The exchange of IP packets proceeds until either the calling or called party terminates the call. 3. The Internet Telephony Signaling Point To manage voice circuits in the PSTN, an H.323 gateway may support the SS7 ISDN user part (ISUP). ISUP defines the protocol and procedures used to set-up, manage, and release voice circuits between terminating line exchanges (i.e., between a calling party and a called party) in the PSTN. ISUP is used for both ISDN and non-isdn calls (see Figure 6). Figure 6: Internet Telephony Signaling Point SS7 messages are exchanged between the H.323 gateway and the PSTN switch (called a service switching point [SSP] in SS7 parlance) over dedicated channels called signaling links. The signaling link may be provisioned as an E-1 (2048 kbps; kbps channels), DS-1 (1544 kbps; 24 64kbps channels), V.35 (64 kbps), DS-0 (64 kbps), and DS-0A (56 kbps) connection. The SSP can originate, terminate, or tandem calls to other switches in the PSTN. Because the SS7 network is critical to call processing, signaling links are usually provisioned in pairs to ensure service availability in the event of an isolated failure. Traffic is shared across all links in the linkset. If one of the links fails, signaling traffic is rerouted over another link in the linkset. If an error occurs on a signaling link (e.g., a message is corrupted or arrives out of sequence), the message (or set of messages) is retransmitted. The primary disadvantage of this architecture is that most H.323 gateways do not currently support a sufficient number of SS7 voice trunks to justify the cost of one (or more) SS7 link(s) to the PSTN. For example, a redundant pair of 64 kbps SS7 links can support the signaling requirements of several thousand voice trunks. 5 of 13 8/26/98 2:51 PM

6 4. The IP to SS7 Network Gateway The cost of providing SS7 signaling services to an Internet telephony switch can be reduced by incorporating an SS7-to-IP gateway. The SS7-to-IP gateway (not to be confused with an H.323 gateway) provides cost-effective SS7 interconnection by concentrating signaling traffic across multiple H.323 gateways onto fewer SS7 links (see Figure 7). Figure 7: SS7-to-IP Gateway The SS7-to-IP gateway provides ISUP signaling services to each H.323 gateway. The server also provides an interface to allow the exchange of signaling information with each H.323 gateway. 5. Internet Telephony Service Switching Point To access IN databases, SS7 transaction capabilities application part (TCAP) support can be added into the SS7-to-IP gateway to create an Internet telephony service switching point (IT-SSP). The IT-SSP consists of gateways, gatekeepers, and an SS7-to-IP gateway with SS7 ISUP and TCAP support (see Figure 8). Figure 8: Internet Telephone Service Switching Point 6 of 13 8/26/98 2:51 PM

7 The SS7-to-IP gateway launches TCAP queries into the PSTN to access IN databases (service control points) For example, TCAP queries are used to fetch routing number(s) associated with a dialed 800/888 number, to access local number portability databases, and to verify the personal identification number (PIN) of a calling card user. By supporting both ISUP and TCAP traffic, SS7-to-IP gateways allow H.323 terminal users to gain access to the full suite of IN services available in the PSTN. The SS7-to-IP gateway connects to an SS7 packet switch called a signal transfer point (STP). An STP routes each incoming message to an outgoing signaling link based on routing information contained in the SS7 message. Because it acts as a network hub, an STP provides improved utilization of the SS7 network by eliminating the need for direct links between signaling points. An STP may perform global title translation, a procedure by which the destination signaling point is determined from digits present in the signaling message (e.g., the dialed 800 number, calling card number, or mobile subscriber identification number). An STP can also act as a firewall to screen SS7 messages exchanged with other networks. H.323 Terminal to PSTN Call Flow with IN Service Access Figure 9 illustrates a sample call flow that originates from an H.323 terminal, accesses a PSTN IN local number portability (LNP) database, and terminates in the PSTN. Note that to complete this call, both TCAP (to query the database and process the response) and ISUP (to setup, manage, and release the call in the PSTN) are required. Figure 9: H.323 Terminal to PSTN Call Flow with IN Service Access 1. An Internet telephony service subscriber initiates an Internet telephony call setup procedure at an H.323 terminal (e.g., a PC). The H.323 terminal sends an IP packet specifying the destination digits information to a pre-selected originating gatekeeper. 2. The originating gatekeeper determines that the destination digits are in a ported exchange (NPA-NXX) and that an LNP SCP must be queried to determine whether the dialed number has been ported to another PSTN switch. 3. The originating gatekeeper sends an LNP query request to the SS7-to-IP gateway. The SS7-to-IP gateway encodes and sends an SS7 LNP TCAP query message containing the original dialed number over an SS7 signaling link to the signal transfer point, which routes the message to the LNP SCP. 4. Upon receiving an SS7 LNP TCAP response message from the SCP (via the STP), the SS7-to-IP gateway sends a formatted response to the originating gatekeeper in an IP packet. 5. The originating gatekeeper determines the destination gatekeeper IP address based on the information contained in the LNP response message and sends a request for destination gateway availability status to the destination gatekeeper. 7 of 13 8/26/98 2:51 PM

8 6. The destination gatekeeper responds to the request by sending destination gateway availability status and associated IP address information to the originating gatekeeper which then sends the message to the H.323 terminal. 7. The H.323 terminal selects a destination gateway and sets up a virtual circuit. This circuit is identified by a call reference variable that will be used by both the H.323 terminal and the destination gateway for the duration of the call to identify all IP packets associated with this particular call. 8. The destination gateway selects an outgoing PSTN voice trunk and sends this information in an IP packet to the destination SS7-to-IP gateway. The SS7-to-IP gateway encodes an SS7 ISUP message and sends it to the PSTN switch (via the STP) in an attempt to set up a call to the dialed telephone number. 9. If the PSTN switch, using SS7 ISUP messaging, signals to indicate the call setup is successful and the called party has answered, the SS7-to-IP gateway generates a corresponding signaling message packet and sends it to the originating gatekeeper. The gatekeeper then signals the originating H.323 terminal to indicate the call is now completed. The originating gateway signals the originating PSTN switch to indicate that the call is now completed. The exchange of IP packets proceeds until either the calling or called party terminates the call. 6. Future of Internet Telephony in the PSTN Internet telephony switches need to support SS7 before IT switches can become widely usable. When new IP signaling protocols, such as the resource reservation protocol (RSVP), are standardized and implemented in network routers, the quality of voice over the Internet (VoN) will improve to levels satisfactory to most users. In the interim, voice over IP (VoIP) technology will be used by large customers in their private intranets and extranets (rather than over the public Internet) where quality-of-service can be controlled. The convergence of voice and data networks means that the venerable PSTN will benefit from rapid innovations in Internet protocol technology over the next ten years. New affordable services, such as videoconferencing, promise to herald in a new era of innovative, cost-effective services. 7. Self-Test 1. SS7 is required to setup a call from an H.323 terminal to a PSTN telephone. True or False? 2. The SS7 protocol enables an Internet telephony service switching point to support. a. toll free calling b. calling card calling c. virtual private network services d. number portability e. all of the above 3. Each H.323 gateway in an Internet telephony service switching point needs its own dedicated 8 of 13 8/26/98 2:51 PM

9 SS7 link. True or False? 4. The ITU H.323 specification defines. a. how to set up and tear down a phone call b. how to route a call on the Internet c. how voice, video and data traffic will be transported over local area networks d. a compression scheme for voice traffic e. how an Internet server should connect to the PSTN 5. Each packet associated with a particular call on the IP network is identified by. a. the dialed digits b. the originating gatekeeper's IP address c. a call reference variable (CRV) d. a point code e. none of the above 6. A toll-free call from an H.323 terminal to the PSTN requires the use of. a. ISUP messages b. TCAP messages c. neither ISUP nor TCAP messages d. both ISUP and TCAP messages 7. IP networks provide guaranteed bandwidth for a each phone call. True or False? 8. Within an Internet telephony service switching point, the mapping of telephone numbers to IP addresses is maintained by the gatekeepers. True or False? 9. H.323 terminals can initiate as well as receive calls. True or False? 10. SS7 enables Internet telephony switches to provide enhanced call processing capabilities, such as call prompting and voice recognition. True or False? 11. Internet telephony service switching points can support calls. 9 of 13 8/26/98 2:51 PM

10 a. from the PSTN to the IP network b. from the PSTN to the PSTN via the IP network c. from the IP network to the PSTN d. from the IP network to the IP network e. all of the above Check score Clear You scored 0 percent correct. Correct answers Now it's your turn to give us feedback. On a scale of 1 to 5, where 1 is the lowest and 5 is the highest, rate this tutorial in terms of the following factors: Clarity Completeness Accuracy Overall 1 Lowest 1 Lowest 1 Lowest 1 Lowest Highest 5 Highest 5 Highest 5 Highest Other comments Your (optional) Would you like to be notified about future tutorials? Send in feedback Clear form Correct Answers 1. SS7 is required to setup a call from an H.323 terminal to a PSTN telephone. True or False? 2. The SS7 protocol enables an Internet telephony service switching point to support. 10 of 13 8/26/98 2:51 PM

11 a. toll free calling b. calling card calling c. virtual private network services d. number portability e. all of the above 3. Each H.323 gateway in an Internet telephony service switching point needs its own dedicated SS7 link. True or False? 4. The ITU H.323 specification defines. a. how to set up and tear down a phone call b. how to route a call on the Internet c. how voice, video and data traffic will be transported over local area networks d. a compression scheme for voice traffic e. how an Internet server should connect to the PSTN 5. Each packet associated with a particular call on the IP network is identified by. a. the dialed digits b. the originating gatekeeper's IP address c. a call reference variable (CRV) d. a point code e. none of the above 6. A toll-free call from an H.323 terminal to the PSTN requires the use of. a. ISUP messages b. TCAP messages c. neither ISUP nor TCAP messages d. both ISUP and TCAP messages 7. IP networks provide guaranteed bandwidth for a each phone call. True or False? 8. Within an Internet telephony service switching point, the mapping of telephone numbers to IP addresses is maintained by the gatekeepers. True or False? 9. H.323 terminals can initiate as well as receive calls. True or False? 10. SS7 enables Internet telephony switches to provide enhanced call processing capabilities, such as call prompting and voice recognition. True or False? 11. Internet telephony service switching points can support calls. 11 of 13 8/26/98 2:51 PM

12 a. from the PSTN to the IP network b. from the PSTN to the PSTN via the IP network c. from the IP network to the PSTN d. from the IP network to the IP network e. all of the above 8. Acronym Guide ATM CRV DSP asynchronous transfer mode call reference variable digital signal processing H.323 a specification defining how voice, video, and data traffic will be transported on the Internet IP ISDN ISUP ITS IT-SP IT-SSP ITU LAN LNP MF MTP Internet protocol integrated services digital network ISDN user part ISDN user part (ISUP) messages are connection-oriented messages used to set up and tear down telephone calls. ISUP defines a handshaking protocol that initiates the phone call, reserves a path for the voice or data between the originating and destination devices, and ultimately releases the call. Internet telephone switch Internet telephone switching point Internet telephone service switching point International Telecommunications Union local area network local number portability multiple frequency message transfer part MTP Level 1 The lowest level of the SS7 protocol, MTP Level 1, is equivalent to the OSI physical layer. MTP Level 1 defines the physical, electrical, and functional characteristics of the digital signaling link. Physical interfaces defined include E-1 (2048 kbps; kbps channels), DS-1 (1544 kbps; kbps channels), V.35 (64 kbps), DS-0 (64 kbps), and DS-0A (56 kbps). MTP Level 2 MTP Level 2 ensures accurate end-to-end transmission of a message across a signaling link. Level 2 implements flow control, message sequence validation, and error checking. When an error occurs on a signaling link, the message (or set of messages) is retransmitted. MTP Level 2 is equivalent to the OSI data link layer. MTP Level 3 MTP Level 3 provides message routing between signaling points in the SS7 network. MTP Level 3 is equivalent in function to the OSI network layer. NPA-NXX North American numbering plan exchange code 12 of 13 8/26/98 2:51 PM

13 PSTN R2 SCP SONET public switched telephone network an analog signaling protocol service control point synchronous optical network SS7 signaling system 7 SSP STP TCAP VoIP WAN service switching point signal transfer point transaction capabilities application part: Transaction capability application part messages are used to support non-circuit related, connectionless information exchange. Among other things, TCAP messages are used to send queries to databases (such as toll-free [freephone] databases), and to return the database response. voice over Internet protocol wide area network [List of Topics] [Tutorial Home Page] Home Page Comment on this tutorial. Home Page Last modified Wednesday, 01-Jul :11:34 CDT Copyright 1998 The International Engineering Consortium 13 of 13 8/26/98 2:51 PM

Introduction to SS7 Signaling This tutorial provides an overview of Signaling System No. 7 (SS7) network architecture and protocols

Introduction to SS7 Signaling This tutorial provides an overview of Signaling System No. 7 (SS7) network architecture and protocols Introduction to SS7 Signaling This tutorial provides an overview of Signaling System No. 7 (SS7) network architecture and protocols SS7 is a set of telephony signaling protocols that are used to set up

More information

Internet Protocol (IP)/Intelligent Network (IN) Integration

Internet Protocol (IP)/Intelligent Network (IN) Integration Internet Protocol (IP)/Intelligent Network (IN) Integration Definition The convergence of the public switched telephone network (PSTN) and Internet protocol (IP) data networks promises exciting opportunities

More information

Voice over Internet Protocol

Voice over Internet Protocol Definition Voice over Internet Protocol Internet telephony refers to communications services voice, facsimile, and/or voice-messaging applications that are transported via the Internet, rather than the

More information

Tutorial on Signaling System 7 (SS7) Performance Technologies www.pt.com

Tutorial on Signaling System 7 (SS7) Performance Technologies www.pt.com Tutorial on Signaling System 7 (SS7) Performance Technologies Table of Contents Topic Page Overview...3 Signaling Links...3 Signaling Points...3 SS7 Signaling Link Types...4 SS7 Protocol Stack...6 Message

More information

Voice over IP. Better answers

Voice over IP. Better answers This white paper provides an overview of voice and data convergence. It discusses enabling business drivers and technical factors, such as compression techniques and QOS parameters, that have complemented

More information

WAN Technology. Heng Sovannarith heng_sovannarith@yahoo.com

WAN Technology. Heng Sovannarith heng_sovannarith@yahoo.com WAN Technology Heng Sovannarith heng_sovannarith@yahoo.com Introduction A WAN is a data communications network that covers a relatively broad geographic area and often uses transmission facilities provided

More information

Introduction. Channel Associated Signaling (CAS) Common Channel Signaling (CCS) Still widely deployed today Considered as old technology

Introduction. Channel Associated Signaling (CAS) Common Channel Signaling (CCS) Still widely deployed today Considered as old technology VoIP and SS7 Introduction Channel Associated Signaling (CAS) Still widely deployed today Considered as old technology Common Channel Signaling (CCS) Separation of signaling and call paths Signaling System

More information

WAN Data Link Protocols

WAN Data Link Protocols WAN Data Link Protocols In addition to Physical layer devices, WANs require Data Link layer protocols to establish the link across the communication line from the sending to the receiving device. 1 Data

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

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

WAN. Introduction. Services used by WAN. Circuit Switched Services. Architecture of Switch Services

WAN. Introduction. Services used by WAN. Circuit Switched Services. Architecture of Switch Services WAN Introduction Wide area networks (WANs) Connect BNs and LANs across longer distances, often hundreds of miles or more Typically built by using leased circuits from common carriers such as AT&T Most

More information

VoIP QoS. Version 1.0. September 4, 2006. AdvancedVoIP.com. sales@advancedvoip.com support@advancedvoip.com. Phone: +1 213 341 1431

VoIP QoS. Version 1.0. September 4, 2006. AdvancedVoIP.com. sales@advancedvoip.com support@advancedvoip.com. Phone: +1 213 341 1431 VoIP QoS Version 1.0 September 4, 2006 AdvancedVoIP.com sales@advancedvoip.com support@advancedvoip.com Phone: +1 213 341 1431 Copyright AdvancedVoIP.com, 1999-2006. All Rights Reserved. No part of this

More information

Chapter 11: WAN. Abdullah Konak School of Information Sciences and Technology Penn State Berks. Wide Area Networks (WAN)

Chapter 11: WAN. Abdullah Konak School of Information Sciences and Technology Penn State Berks. Wide Area Networks (WAN) Chapter 11: WAN Abdullah Konak School of Information Sciences and Technology Penn State Berks Wide Area Networks (WAN) The scope of a WAN covers large geographic areas including national and international

More information

Signaling System 7 (SS7) Gateway Solution for Internet Access

Signaling System 7 (SS7) Gateway Solution for Internet Access Signaling System 7 (SS7) Gateway Solution for Internet Access Definition A signaling system 7 (SS7) gateway is an intelligent network (IN) based system that can be used in conjunction with network-access

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

Chapter 10 VoIP for the Non-All-IP Mobile Networks

Chapter 10 VoIP for the Non-All-IP Mobile Networks Chapter 10 VoIP for the Non-All-IP Mobile Networks Prof. Yuh-Shyan Chen Department of Computer Science and Information Engineering National Taipei University Outline 10.1 GSM-IP: VoIP Service for GSM 256

More information

Network Overview. Background Traditional PSTN Equipment CHAPTER

Network Overview. Background Traditional PSTN Equipment CHAPTER CHAPTER 1 Background Traditional PSTN Equipment Traditional telephone services are engineered and offered over the public switched telephone network (PSTN) via plain old telephone service (POTS) equipment

More information

Avancerede Datanet VoIP

Avancerede Datanet VoIP Avancerede Datanet VoIP Ole Brun Madsen Professor University of Aalborg Avancerede Datanet VoIP 1 Voice over IP (VoIP) IP telephony switches enable voice calls to be made within Protocol (IP) networks,

More information

An Introduction to Voice over the IP. Test1 Pool Questions

An Introduction to Voice over the IP. Test1 Pool Questions Dr. Mona Cherri Business and Technology North Lake College/DCCCD An Introduction to Voice over the IP I. True and False Questions Test1 Pool Questions 1. The first Internet-telephony software, Internet

More information

Cisco Networks (ONT) 2006 Cisco Systems, Inc. All rights reserved.

Cisco Networks (ONT) 2006 Cisco Systems, Inc. All rights reserved. Optimizing Converged Cisco Networks (ONT) reserved. Lesson 2.4: Calculating Bandwidth Requirements for VoIP reserved. Objectives Describe factors influencing encapsulation overhead and bandwidth requirements

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

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

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

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

5. DEPLOYMENT ISSUES Having described the fundamentals of VoIP and underlying IP infrastructure, let s address deployment issues.

5. DEPLOYMENT ISSUES Having described the fundamentals of VoIP and underlying IP infrastructure, let s address deployment issues. 5. DEPLOYMENT ISSUES Having described the fundamentals of VoIP and underlying IP infrastructure, let s address deployment issues. 5.1 LEGACY INTEGRATION In most cases, enterprises own legacy PBX systems,

More information

WANs connect remote sites. Connection requirements vary depending on user requirements, cost, and availability.

WANs connect remote sites. Connection requirements vary depending on user requirements, cost, and availability. WAN Review A WAN makes data connections across a broad geographic area so that information can be exchanged between distant sites. This topic defines the characteristics of a WAN. WAN Overview WANs connect

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

Voice over IP Basics for IT Technicians

Voice over IP Basics for IT Technicians Voice over IP Basics for IT Technicians White Paper Executive summary The IP phone is coming or has arrived on desk near you. The IP phone is not a PC, but does have a number of hardware and software elements

More information

VOICE OVER IP AND NETWORK CONVERGENCE

VOICE OVER IP AND NETWORK CONVERGENCE POZNAN UNIVE RSITY OF TE CHNOLOGY ACADE MIC JOURNALS No 80 Electrical Engineering 2014 Assaid O. SHAROUN* VOICE OVER IP AND NETWORK CONVERGENCE As the IP network was primarily designed to carry data, it

More information

Receiving the IP packets Decoding of the packets Digital-to-analog conversion which reproduces the original voice stream

Receiving the IP packets Decoding of the packets Digital-to-analog conversion which reproduces the original voice stream Article VoIP Introduction Internet telephony refers to communications services voice, fax, SMS, and/or voice-messaging applications that are transported via the internet, rather than the public switched

More information

Data Communications & Computer Networks. Circuit and Packet Switching

Data Communications & Computer Networks. Circuit and Packet Switching Data Communications & Computer Networks Chapter 9 Circuit and Packet Switching Fall 2008 Agenda Preface Circuit Switching Softswitching Packet Switching Home Exercises ACOE312 Circuit and packet switching

More information

4. H.323 Components. VOIP, Version 1.6e T.O.P. BusinessInteractive GmbH Page 1 of 19

4. H.323 Components. VOIP, Version 1.6e T.O.P. BusinessInteractive GmbH Page 1 of 19 4. H.323 Components VOIP, Version 1.6e T.O.P. BusinessInteractive GmbH Page 1 of 19 4.1 H.323 Terminals (1/2)...3 4.1 H.323 Terminals (2/2)...4 4.1.1 The software IP phone (1/2)...5 4.1.1 The software

More information

Course 4: IP Telephony and VoIP

Course 4: IP Telephony and VoIP Course 4: IP Telephony and VoIP Telecommunications Technical Curriculum Program 3: Voice Knowledge 6/9/2009 1 Telecommunications Technical Curriculum Program 1: General Industry Knowledge Course 1: General

More information

FURTHER READING: As a preview for further reading, the following reference has been provided from the pages of the book below:

FURTHER READING: As a preview for further reading, the following reference has been provided from the pages of the book below: FURTHER READING: As a preview for further reading, the following reference has been provided from the pages of the book below: Title: Signaling System #7 Second Edition Author: Travis Russell Publisher:

More information

An Introduction to VoIP Protocols

An Introduction to VoIP Protocols An Introduction to VoIP Protocols www.netqos.com Voice over IP (VoIP) offers the vision of a converged network carrying multiple types of traffic (voice, video, and data, to name a few). To carry out this

More information

Gateways and Their Roles

Gateways and Their Roles Gateways and Their Roles Understanding Gateways This topic describes the role of voice gateways and their application when connecting VoIP to traditional PSTN and telephony equipment. Analog vs. Digital

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

Need for Signaling and Call Control

Need for Signaling and Call Control Need for Signaling and Call Control VoIP Signaling In a traditional voice network, call establishment, progress, and termination are managed by interpreting and propagating signals. Transporting voice

More information

Voice over IP (VoIP) Basics for IT Technicians

Voice over IP (VoIP) Basics for IT Technicians Voice over IP (VoIP) Basics for IT Technicians VoIP brings a new environment to the network technician that requires expanded knowledge and tools to deploy and troubleshoot IP phones. This paper provides

More information

Remote Office 9150. Overview. Customer Profile. Key Points. Typical Applications

Remote Office 9150. Overview. Customer Profile. Key Points. Typical Applications Remote Office 9150 Overview The Nortel Networks Remote Office 9150 is a powerful option for extending cost-effective, high-quality communications to remote offices. The award-winning1 Remote Office 9150

More information

Indepth Voice over IP and SIP Networking Course

Indepth Voice over IP and SIP Networking Course Introduction SIP is fast becoming the Voice over IP protocol of choice. During this 3-day course delegates will examine SIP technology and architecture and learn how a functioning VoIP service can be established.

More information

Signaling System 7 (SS7)

Signaling System 7 (SS7) Signaling System 7 (SS7) Definition Signaling System 7 (SS7) is an architecture for performing out-of-band signaling in support of the call-establishment, billing, routing, and information-exchange functions

More information

Optimizing Converged Cisco Networks (ONT)

Optimizing Converged Cisco Networks (ONT) Optimizing Converged Cisco Networks (ONT) Module 2: Cisco VoIP Implementations (Deploy) Calculating Bandwidth Requirements for VoIP Objectives Describe factors influencing encapsulation overhead and bandwidth

More information

Lecture Computer Networks

Lecture Computer Networks Lecture Computer Networks Prof. Dr. Hans Peter Großmann mit M. Rabel sowie H. Hutschenreiter und T. Nau Sommersemester 2012 Institut für Organisation und Management von Informationssystemen Asynchronous

More information

Encapsulating Voice in IP Packets

Encapsulating Voice in IP Packets Encapsulating Voice in IP Packets Major VoIP Protocols This topic defines the major VoIP protocols and matches them with the seven layers of the OSI model. Major VoIP Protocols 15 The major VoIP protocols

More information

FACILITY TELECOMMUNICATIONS MANAGEMENT FOR THE GOVERNMENT EMERGENCY TELECOMMUNICATIONS SERVICE Introduction

FACILITY TELECOMMUNICATIONS MANAGEMENT FOR THE GOVERNMENT EMERGENCY TELECOMMUNICATIONS SERVICE Introduction FACILITY TELECOMMUNICATIONS MANAGEMENT FOR THE GOVERNMENT EMERGENCY TELECOMMUNICATIONS SERVICE Introduction This document provides telecommunications management information for organizations that use the

More information

VoIP-PSTN Interoperability by Asterisk and SS7 Signalling

VoIP-PSTN Interoperability by Asterisk and SS7 Signalling VoIP-PSTN Interoperability by Asterisk and SS7 Signalling Jan Rudinsky CESNET, z. s. p. o. Zikova 4, 160 00 Praha 6, Czech Republic rudinsky@cesnet.cz Abstract. PSTN, the world's circuit-switched network,

More information

Chapter 2 - The TCP/IP and OSI Networking Models

Chapter 2 - The TCP/IP and OSI Networking Models Chapter 2 - The TCP/IP and OSI Networking Models TCP/IP : Transmission Control Protocol/Internet Protocol OSI : Open System Interconnection RFC Request for Comments TCP/IP Architecture Layers Application

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

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

1 Introduction to mobile telecommunications

1 Introduction to mobile telecommunications 1 Introduction to mobile telecommunications Mobile phones were first introduced in the early 1980s. In the succeeding years, the underlying technology has gone through three phases, known as generations.

More information

Frequently Asked Questions about Integrated Access

Frequently Asked Questions about Integrated Access Frequently Asked Questions about Integrated Access Phone Service How are local, long distance, and international calls defined? Local access transport areas (LATAs) are geographical boundaries set by the

More information

Introduction to WAN Technologies

Introduction to WAN Technologies CHAPTER 3 Chapter Goals Become familiar with WAN terminology. Learn about different types of WAN connections. Become familiar with different types of WAN equipment. This chapter introduces the various

More information

3.1 TELECOMMUNICATIONS, NETWORKS AND THE INTERNET

3.1 TELECOMMUNICATIONS, NETWORKS AND THE INTERNET 3.1 TELECOMMUNICATIONS, NETWORKS AND THE INTERNET The Business Value of Telecommunications and Networking Business value impacts of the telecommunications and Networking are: Declining transaction costs

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

Across China: The State Information Center s Nationwide Voice-over-IP Network

Across China: The State Information Center s Nationwide Voice-over-IP Network Across China: The State Information Center s Nationwide Voice-over-IP Network A customer case study from Quintum Technologies The State Information Center (SIC) is the government body responsible for delivering

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

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

Operation Manual Voice Overview (Voice Volume) Table of Contents

Operation Manual Voice Overview (Voice Volume) Table of Contents Operation Manual Voice Over (Voice Volume) Table of Contents Table of Contents Chapter 1 Voice Over... 1-1 1.1 Introduction to VoIP... 1-1 1.1.1 VoIP System... 1-1 1.1.2 Basic VoIP Call Flow... 1-2 1.1.3

More information

SIP Trunking and Voice over IP

SIP Trunking and Voice over IP SIP Trunking and Voice over IP Agenda What is SIP Trunking? SIP Signaling How is Voice encoded and transported? What are the Voice over IP Impairments? How is Voice Quality measured? VoIP Technology Confidential

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

Region 10 Videoconference Network (R10VN)

Region 10 Videoconference Network (R10VN) Region 10 Videoconference Network (R10VN) Network Considerations & Guidelines 1 What Causes A Poor Video Call? There are several factors that can affect a videoconference call. The two biggest culprits

More information

Access Mediation: Preserving Network Security and Integrity

Access Mediation: Preserving Network Security and Integrity Access Mediation: Preserving Network Security and Integrity Definition Access mediation is the process of examining and controlling signaling traffic between networks, resources and users by filtering

More information

This course has been retired. View the schedule of current networking

This course has been retired. View the schedule of current <a href=http://www.ptr.co.uk/networkingcourses.htm>networking Introduction to Data Communications & Networking Course Description: This course has been retired. View the schedule of current networking Courses

More information

Understanding IP Faxing (Fax over IP)

Understanding IP Faxing (Fax over IP) Understanding IP Faxing (Fax over IP) A detailed technical overview of how VoIP technology and IP Faxing (Fax over IP) are changing the way organizations utilize existing network infrastructures for voice

More information

(Refer Slide Time: 4:45)

(Refer Slide Time: 4:45) Digital Voice and Picture Communication Prof. S. Sengupta Department of Electronics and Communication Engineering Indian Institute of Technology, Kharagpur Lecture - 38 ISDN Video Conferencing Today we

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

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

52-30-15 DATA COMMUNICATIONS MANAGEMENT. Larry Schessel INSIDE

52-30-15 DATA COMMUNICATIONS MANAGEMENT. Larry Schessel INSIDE 52-30-15 DATA COMMUNICATIONS MANAGEMENT VOICE AND DATA NETWORK INTEGRATION Larry Schessel INSIDE Voice and Data Networks; Voice Over Internet Protocol; VoIP Products; Voice and Data Network Integration;

More information

Curso de Telefonía IP para el MTC. Sesión 1 Introducción. Mg. Antonio Ocampo Zúñiga

Curso de Telefonía IP para el MTC. Sesión 1 Introducción. Mg. Antonio Ocampo Zúñiga Curso de Telefonía IP para el MTC Sesión 1 Introducción Mg. Antonio Ocampo Zúñiga Conceptos Generales VoIP Essentials Family of technologies Carries voice calls over an IP network VoIP services convert

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

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

IP Telephony and Network Convergence

IP Telephony and Network Convergence IP Telephony and Network Convergence Raimo.Kantola@hut.fi Rkantola/28.11.00/s38.118 1 Today corporations have separate data and voice networks Internet Corporate Network PSTN, ISDN Rkantola/28.11.00/s38.118

More information

Module 2 Communication Switching. Version 1 ECE, IIT Kharagpur

Module 2 Communication Switching. Version 1 ECE, IIT Kharagpur Module 2 Communication Switching Lesson 2 Circuit Switching INSTRUCTIONAL OBJECTIVES GENERAL This lesson is aimed at developing the concept and application of circuit switching which is a very important

More information

Mobile Wireless Overview

Mobile Wireless Overview Mobile Wireless Overview A fast-paced technological transition is occurring today in the world of internetworking. This transition is marked by the convergence of the telecommunications infrastructure

More information

Convergence Technologies Professional (CTP) Course 1: Data Networking

Convergence Technologies Professional (CTP) Course 1: Data Networking Convergence Technologies Professional (CTP) Course 1: Data Networking The Data Networking course teaches you the fundamentals of networking. Through hands-on training, you will learn the vendor-independent

More information

NTS Testing Labs Voice over IP (VoIP) Product Test Lab Compatibility & Functionality Test Outline

NTS Testing Labs Voice over IP (VoIP) Product Test Lab Compatibility & Functionality Test Outline NTS Testing Labs Voice over IP (VoIP) Product Test Lab Compatibility & Functionality Test Outline Revision 1.0 NATIONAL TECHNICAL SYSTEMS The NTS Mission: Assisting our Clients in Navigating a Short Course

More information

EE4367 Telecom. Switching & Transmission. Prof. Murat Torlak

EE4367 Telecom. Switching & Transmission. Prof. Murat Torlak Packet Switching and Computer Networks Switching As computer networks became more pervasive, more and more data and also less voice was transmitted over telephone lines. Circuit Switching The telephone

More information

CTS2134 Introduction to Networking. Module 07: Wide Area Networks

CTS2134 Introduction to Networking. Module 07: Wide Area Networks CTS2134 Introduction to Networking Module 07: Wide Area Networks WAN cloud Central Office (CO) Local loop WAN components Demarcation point (demarc) Consumer Premises Equipment (CPE) Channel Service Unit/Data

More information

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

Understanding IP Faxing (Fax over IP)

Understanding IP Faxing (Fax over IP) A RICOH COMPANY Understanding IP Faxing (Fax over IP) A detailed technical overview of how VoIP technology and IP Faxing (Fax over IP) are changing the way organizations utilize existing network infrastructures

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

Analysis of Real-time Fax over IP (FoIP) Using Simulation

Analysis of Real-time Fax over IP (FoIP) Using Simulation Analysis of Real-time Fax over IP (FoIP) Using Simulation By Masood Khosroshahy A thesis presented to Iran University of Science and Technology (IUST) in fulfillment of the thesis requirement for the degree

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

TAXONOMY OF TELECOM TERMS

TAXONOMY OF TELECOM TERMS TAXONOMY OF TELECOM TERMS Prepared by TUFF Ltd This short taxonomy is designed to describe the various terms used in today s telecommunications industry. It is not intended to be all embracing but to describe

More information

- Basic Voice over IP -

- Basic Voice over IP - 1 Voice over IP (VoIP) - Basic Voice over IP - Voice over IP (VoIP) is a digital form of transport for voice transmissions, replacing analog phone systems. The benefits of VoIP are considerable: Better

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

CompTIA Convergence+ 2006 Examination Objectives

CompTIA Convergence+ 2006 Examination Objectives CompTIA Convergence+ 2006 Examination Objectives Introduction The CompTIA Convergence+ examination covering the 2006 objectives certifies that the successful candidate has the necessary knowledge to perform

More information

Three Network Technologies

Three Network Technologies Three Network Technologies Network The largest worldwide computer network, specialized for voice ing technique: Circuit-switching Internet The global public information infrastructure for data ing technique:

More information

VoIP for Radio Networks

VoIP for Radio Networks White Paper VoIP for Radio Networks Revision 1.0 www.omnitronicsworld.com In the early eighties, a communications protocol was created that allowed the research community to send data anywhere in the world

More information

OFFICEED Service System

OFFICEED Service System Service System Internal Solution Internal Line Service Corporate Service Service System The service provides flat-rate voice calls between FOMA s, and between FOMA s and s under user s. New equipment has

More information

Network+ Guide to Networks, Fourth Edition. Chapter 7 WANs, Internet Access, and Remote Connectivity. Objectives

Network+ Guide to Networks, Fourth Edition. Chapter 7 WANs, Internet Access, and Remote Connectivity. Objectives Network+ Guide to Networks, Fourth Edition Chapter 7 WANs, Internet Access, and Remote Connectivity Objectives Identify a variety of uses for WANs Explain different WAN topologies, including their advantages

More information

Hands on VoIP. Content. Tel +44 (0) 845 057 0176 enquiries@protelsolutions.co.uk. Introduction

Hands on VoIP. Content. Tel +44 (0) 845 057 0176 enquiries@protelsolutions.co.uk. Introduction Introduction This 4-day course offers a practical introduction to 'hands on' VoIP engineering. Voice over IP promises to reduce your telephony costs and provides unique opportunities for integrating voice

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

TSC (Total Solution Communications Ltd)

TSC (Total Solution Communications Ltd) TSC (Total Solution Communications Ltd) 1 Parkway Drive, Mairangi Bay, North Harbour Phone: 09 477 2888 Fax: 09 477 2889 E-Mail: info@tsc.co.nz Web: www.tsc.co.nz A vaya IP Office Converged Communications

More information

Analysis and Simulation of VoIP LAN vs. WAN WLAN vs. WWAN

Analysis and Simulation of VoIP LAN vs. WAN WLAN vs. WWAN ENSC 427 Communication Networks Final Project Report Spring 2014 Analysis and Simulation of VoIP Team #: 2 Kadkhodayan Anita (akadkhod@sfu.ca, 301129632) Majdi Yalda (ymajdi@sfu.ca, 301137361) Namvar Darya

More information

Multiservice Access Technologies

Multiservice Access Technologies CHAPTER 18 Multiservice Access Technologies Multiservice networking is emerging as a strategically important issue for enterprise and public service provider infrastructures alike. The proposition of multiservice

More information

Mobile Application Part protocol implementation in OPNET

Mobile Application Part protocol implementation in OPNET Mobile Application Part protocol implementation in OPNET Vladimir Vukadinovic and Ljiljana Trajkovic School of Engineering Science Simon Fraser University Vancouver, BC, Canada E-mail: {vladimir, ljilja}@cs.sfu.ca

More information

Comparison of Voice over IP with circuit switching techniques

Comparison of Voice over IP with circuit switching techniques Comparison of Voice over IP with circuit switching techniques Author Richard Sinden Richard Sinden 1 of 9 Abstract Voice-over-IP is a growing technology. Companies are beginning to consider commercial

More information

Integration of Voice over Internet Protocol Experiment in Computer Engineering Technology Curriculum

Integration of Voice over Internet Protocol Experiment in Computer Engineering Technology Curriculum Integration of Voice over Internet Protocol Experiment in Computer Engineering Technology Curriculum V. Rajaravivarma and Farid Farahmand Computer Electronics and Graphics Technology School of Technology,

More information