Presented by: John Downing, B.Eng, MBA, P.Eng

Transcription

1 Presented by: John Downing, B.Eng, MBA, P.Eng John Downing co-founder of TrainingCity. VoIP Training Development Lead. VoIP & SIP Consultant to Telecom & Enterprise Clients Kerry Parnell Vice President, Sales at TrainingCity TrainingCity

2 In this seminar we will explore: 1. What is IP Trunking (or SIP Trunking if you prefer!) 2. The importance of SIP: Session Initiation Protocol 3. Why customers are shifting to VoIP 4. How to Sell IP Trunking 5. The Marketplace: What s out there: 1. Legacy Trunks 2. Other Carriers / ISPs 3. Internet Telephony Service Providers 6. Questions & (hopefully) Answers! TrainingCity

3 What exactly is S IP Trunking? Connect the PBX to the carrier using TCP/IP data networking instead of legacy TDM (Time Division Multiplexing) Trunk technologies. SIP Trunking extends the concept top include end to end connectivity for VoIP calls through the data network. More than just a replacement for the T-1/ISDN PRI Trunk. SIP Trunking is an end to end solution delivered over an IP Network. TrainingCity What exactly is an IP Trunk? TCP/IP Bandwidth + SIP Signalling Bandwidth for Voice & Video transport Signalling to interconnect client VoIP infrastructure with: Other Carrier SIP Trunking Clients Carrier Provided PSTN Gateways TrainingCity

4 T-1 & ISDN are inefficient: Traffic Engineering for traditional PBX requires the addition of extra T-1 or PRI in groups of 24/23 channels. Bandwidth for SIP Trunking can be made available in any increment. SIP Trunking is more than just a replacement for TDM Trunks. It is a solution for end to end VoIP connectivity & integral to all future Carrier Value Added Service offerings. Irony is that SIP, a TCP/IP Protocol, may finally achieve the carrier s old SS7 dream of an Intelligent Network offering. TrainingCity TrainingCity

5 One IP PBX PSTN Gateways with TDM Trunks distributed geographically. TrainingCity One IP PBX PSTN Gateways with TDM Trunks distributed geographically. TrainingCity

6 SIP Trunking can scale more easily than legacy ISDN PRI Trunks. The Physical Layer of SIP Trunking is any available bandwidth, not limited to incremental additions of PSTN circuits and associated PBX hardware. If a client needs more VoIP calling capability at a specific site, add additional bandwidth to access router. TrainingCity Use existing WAN for interconnectivity of Offices: A multi-site corporate client can optimize its supply chain by eliminating contractual arrangements with multiple PSTN access providers. Use existing WAN to backhaul VoIP calls to Rogers supplied PSTN Gateways. TrainingCity

7 Hard to get head around idea that a SIP Trunk extends through the WAN. For a client this means a SIP Trunk could connect their corporate LAN to any PSTN Gateway in the Carrier WAN, or another client of the Carrier. Next step is to offer Trusted SIP Peering arrangements with ihother carriers. TrainingCity

8 SIP defined in RFC 3261 Establish & manage multimedia sessions. Client / Server : Request / Response Architecture Similar to HTTP: SIP/UDP/IP/Layer 2 May use Session Description Protocol SDP/SIP/UDP/IP/Layer 2 Exchange SIP messages between end points TrainingCity SIP dominates Enterprise and Carrier VoIP, Video, & Multimedia deployments. All equipment vendors actively support standard. Other VoIP Signaling standards are obsolete: H.323 MGCP Vendor Specific such as Cisco SCCP IAX2 (Possible exception: Asterisk specific and ETF std) TrainingCity

9 SIP is part of TCP/IP. Considered ed an Application Layer Protocol in TCP/IP just let HTTP & FTP. Works the same way. SIP messages use regular TCP/IP packets for transport from IP Phone to IP PBX. Takes advantage of all IP Security. TrainingCity SIP Does not transmit the voice directly. SIP sets up the Voice Over IP packets for transmission. Voice is sent using a protocol called Real Time Protocol (RTP). TrainingCity

10 VoIP consists of two sets of IP Packets: Real Time Protocol (RTP) packets Often referred to as an RTP Stream because the voice (and video) is actually carried in RTP. Session Initiation Protocol (SIP) Packets SIP Packets, or SIP messages as they are called, setup and teardown the RTP Streams. TrainingCity Client sends a request message Server sends back a response message CALLER CALLEE User Agent Server User Agent Client INVITE 200 OK User Agent Server User Agent Client TrainingCity

11 VoIP calls consist of SIP Messages Signalling g and Real Time Protocol Packets to transport the voice. As only a few SIP messages are needed to setup most VoIP calls, the bulk of the Bandwidth requirement is for the RTP Streams TrainingCity Item Standard Relationship Servers SIP IETF Peer to Peer & Client Server Proxy, Registrar, Location, Redirect TrainingCity

12 Item Media Capabilities Exchange Security Quality of Service SIP Uses Session Description Protocol ITEF Standards, TLS, IPSec, etc. IETF Standards, DiffServ, RSVP, etc. TrainingCity SIP is the signalling standard for all Voice & Video over IP. SIP is unlikely to be replaced any time soon. Lots of innovation occurring around SIP. Clients need to prepare for a world where TDM Legacy voice is no longer supported. TrainingCity

13 PSTN (Public Switched Telephone Network): Transport of Voice using concept of Circuits TDM - Time Division i i Multiplexing l i examples such as T-1, ISDN PRI. Analog CO circuits. Signalling: Various access technology standards build around core network signalling based on SS7. VoIP: Transport over IP (Packet) networks Layer 2/IP/UDP/RTP/Codec Signalling using SIP Session Initiation Protocol Layer 2/IP/UDP/SIP TrainingCity

14 VoIP Challenges include: 1. Meeting all the specific requirements of making a phone call : IT networks designed for best effort, shared infrastructure, & optimized to minimize cost while providing reasonable service. 2. Regulatory requirements: Calling 911 law enforcement intercepts t Billing & Tariffs TrainingCity Challenges: Multi-vendor legacy PBX support Geographic & Multi-vendor specific PBX support demands. Carrier/Supplier Management Need separate carrier agreements for many diverse locations. Physical Plant Maintaining facilities for large, complex PBX Hardware. TrainingCity

15 Core components of Enterprise VoIP include: IP Phones IP PBX PSTN Gateway(s) Session Border Controller In carrier infrastructure the focus is on transport. Rather than an IP PBX the carrier may deploy a soft switch server. TrainingCity Two basic types of IP PBXs in the market today: Legacy PBXs that are also VoIP enabled. Pure VoIP IP PBX. TrainingCity

16 Phones connect to LAN using Ethernet + TCP/IP. PBX becomes an IP PBX. Also uses Ethernet + TCP/IP. No need for PSTN trunks when calling another VoIP Phone in the network. PSTN trunks can be accessed using a VoIP/PSTN Gateway. TrainingCity IP PBX replicates functionality of 1990s proprietary p TDM PBX: All the features of a PBX replicated in VoIP: Call forward Do Not Disturb Transfer, Hold, etc, etc, etc. Now just another Server on the network: AddonfunctionalitysuchasVoic canbe as can outsourced to a dedicated Voice Mail Server. Same for IVR (Interactive Voice Response) or any other function. TrainingCity

17 The PSTN Gateway device is designed to convert: VoIP transport to/from Circuit transport Layer 2/IP/UDP/RTP/Codec to/from TDM Codec SIP signals to SS7 based PSTN signals Layer 2/IP/UDP/SIP to/from Q.Sig or ISUP based SS7 The PSTN Gateway may also have to perform codec conversion: PSTN T-1 interface requires G.711 µ-law but VoIP transport sent voice encoded in G.729. TrainingCity SBC provides Web Proxy Server functionality for VoIP & SIP. Note that RTP Streams and SIP Dialogs both connect through the SBC. TrainingCity

18 SIP Trunk implies much more than just over T-1. Some clients may think this is all SIP trunking offers. TrainingCity Corporations may opt for Private PSTN Gateways. SIP Trunking on their WAN. Still can offer access to RBS PSTN Gateways & other QoS management services. TrainingCity

19 TrainingCity Client with several locations can use SIP Trunking over an IP WAN to interconnect their IP PBXs. Provide incoming and outgoing calls to the PSTN through the supplied SIP Trunks. Client no longer requires T-1 or PRI trunks at every location, just access to the WAN. TrainingCity

20 Solution with SIP Trunking must include: Provide all basic call services, LD, DID, Toll Free, CLID, etc. Shared bandwidth usage across the WAN. Setup SLAs to permit client to scale Quality Assured VoIP bandwidth across multiple WAN access locations. E-911 support. Redundancy & backup. Security Private Network VPN connectivity for VoIP & SIP traffic Secure codecs, SIPs, SRTP, should all be supported. TrainingCity TrainingCity

21 TrainingCity Client can trust Rogers to provide secure access to VoIP TrainingCity

22 TrainingCity Yes it works if configured properly. Option One: Route call to 911 contact centre, tell operator location, then get routed to correct Public Safety Answering Point (PSAP). Option Two: Deploy at least one local PSTN gateway and associated PSTN trunk at each location, configure SIP to send all 911 calls to locally (LAN) deployed PSTN Gateway. TrainingCity

23 Ideas to Start Client Conversations: SIP is the Future. No one is still developing old TDM equipment. Sooner or later old TDM PBX equipment will reach end of life. Get out in front of impending requirements. All sorts of SIP enabled Unified Communications solutions are out there. Opportunities to align business processes with productive SIP enabled solutions are endless: Unified Communications: /vmail/messaging/social media. Customer interaction solutions. Contact Centre integration (infinitely easier & better than old TDM solutions from the 1990s!) TrainingCity

24 Important to educate client on idea that SIP Trunking is more than just a replacement for old TDM access trunks. SIP Trunks extend IP PBX call control into the WAN. SIP Trunks allow client to access RBS PSTN Gateways AND RBS Services! Amazing opportunity for RBS to (finally) start offering enterprise grade managed voice/video/productivity solution(s). TrainingCity Clients will be looking for a wide range of capabilities including: Protocol Support Service Providers technical capabilities Cost Security Availability Interface options & protocol support Network geographically diversity. Path to Unified Communications TrainingCity

25 Internet Telephony Service Providers range from Vonage to Basement BBS Guys. They scale with the Internet, but so does RBS. Hard for enterprise clients (& IP PBX vendors) to know who to trust. Rogers is a trusted WAN partner with extraordinary security & reliability expertise. ITSP is fly by night, accident waiting to happen with confidential fd information. TrainingCity Beyond the SIP Trunk to PSTN Gateway, think about managed SIP Services: Voice Mail Servers Contact /Social Media Centre scaling Content Server integration Security, Security, Security You ve got private WAN capability YoucansecureVoIPtrafficthatneedstoflowinto that needs to flow into The Internet through Session Border Controllers & Application Gateways. TrainingCity

26 Partner with other geographically diverse Carriers to offer Trusted SIP Trunks to other jurisdictions. Offer clients secure SIP trunking solution that reaches USA & global locations. TrainingCity Small to Medium Enterprise clients benefit: Combine voice & data network access. Eliminate onsite TDM trunks to PSTN by using Gateways. Reduce capital costs. Take advantage of SIP based productivity enhancement features associated with IP PBXs such as: Unified Communications Follow me features Etc. TrainingCity

27 Clients of RBS could: Avoid the requirement to maintain multiple-facility TDM solutions. Establish a point of presence without having to build local facilities. Point E.164 numbers to any trunk group/ip address/url Provision and Scale On Demand Port over existing PSTN DID numbers TrainingCity Not just PRI replacement Multiple locations served from a single IP PBX Capital and expense savings with converged solutions Support features like single number service Multi-location services SIP trunks more flexible and efficient Part of business case to support UC deployment TrainingCity

28 SIP Trunking is not just a trunk replacement It is migration from TDM to Voice over the data network. Is equipment SIP compliant? Professional services to perform: Protocol check Project Management Capacity planning TrainingCity Voice networking still dominated by TDM infrastructure. SIP Trunking is an enabling technology Brings UC to organizations How to evolve Voice infrastructure to SIP Trunking How to choose a SIP Trunking service provider. TrainingCity

29 Breaks down into three main groups: Internet Telephony Service Providers (ITSP) Skype/Microsoft, Vonage, Google, no name small players Traditional Carriers Bell, Verizon Unexpected entrants Akamai? TrainingCity

30 ITSPs range from major players to one guy in his parent s basement: Can t dismiss either, lots of great companies started in garages. Major players Vonage & Skype Hard to dismiss the 800,000,000,000 Gorilla called Google. Mid sized players. Small ITSPs that offer all sorts of quasi-legal VoIP services globally. TrainingCity Geographical access still defines much SIP Carrier competition. Need ability to offer corporate clients physical access to carrier WAN. Regulatory issues remain important, but not as strict as legacy PSTN. Bottom line, usual suspects for now. TrainingCity

31 Bell offers SIP services to large enterprise customers in Ontario & Quebec. Expanding in West Rolling out SIP to SMEs over past year. Reputation ti for excellent in SIP knowledge. Working to change the culture of the company to VoIP & SIP through effective Training & Education programs. TrainingCity Must have MPLS VPN (Layer 3 or Layer 2 Ethernet) connectivity to access SIP Trunking. Insurance of Voice Quality Provisioning the right QoS in the Data Network, engineer for voice with strict considerations for packet loss, jitter, & latenancy. Bell offers clients the option to access their traffic status, usage of SIP trunking bandwidth. Service Level Objectives: Mean Time to Repair 4 hours Availability 99.9% TrainingCity

32 Long Distance pricing No more long distance for calls internal on WAN Make calls from IP PBX to any rate centre with trunk group in place Calls on trunk groups that are not local to the destination charged according to rate plan. TrainingCity Verizon offers a wholesale SIP Gateway service: Uses IPSec to transmit SIP & RTP (VoIP calls) between client carrier network & Verizon network. Client can access multiple Verizon PSTN Gateways. Termination of both local & long distance to/from Verizon SIP/VoIP network to PSTN. Includes support for FTNA (Foreign Telephone Number Assignment capability. TrainingCity

33 Verizon offers a wholesale SIP Gateway service: Pricing models vary with carrier client requirements. Monthly recurring charges Non-recurring charges for specific services Metered per minute pricing Domestic usage rates based on terminating Local Access & Transport Area (LATA) or classification of the terminating Local Exchange Carrier (LEC) based on the dialed NPA-NXX. TrainingCity As long as a proper mixture of Interstate and Intrastate rates can be maintained, discounts are available for certain call jurisdictions. Interstate- and intrastate-defined traffic will rate at a six-second minimum/six-second increment. The international rate structure is based on the terminating location (landline and wireless termination). The extended domestic traffic will rate at a six-second minimum/sixsecond increment. The international traffic will rate at a 30-second minimum/six-second second increment, except for Mexico, which will rate at a 60-second minimum/60-second increment. 2Bservice.html TrainingCity

34 Feel free to questions to John or Kerry later if desired. If you are interested in receiving updates of the slide presentation and SIP Trunking resources please see Kerry before leaving to be added to our distribution list. TrainingCity

35 Call or us anytime with questions: SIP Technical Questions: John Downing Professional Services related to SIP Deployments & Training Requirements: Kerry Parnell TrainingCity Review of equipment configurations Bandwidth dt requirements e e analysisa s Training: Course 784: VoIP Hands ON Workshop 3 Days Course 2004: SIP Hands ON Workshop 2 Days TrainingCity

36 TrainingCity Classes available on-site and as Public Deliveries: Course 2004: SIP Hands ON Workshop Course 801: IPv6 Fundamentals Course 802: DNSSEC Hands ON Course 784: VoIP Hands ON Workshop TrainingCity