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Technical Strategy: Secure SIP Trunking in Legacy PSTN/PBX Environments

Technical Strategy: Secure SIP Trunking in Legacy PSTN/PBX Environments. Scott Beer Ingate scott@ingate.com. Rich Poole Dialogic rich.poole@dialogic.com. September 2, 2009. The SIP Trunking Enabler. Agenda. How Are Gateways Used Today? What Does A Gateway Do?

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Technical Strategy: Secure SIP Trunking in Legacy PSTN/PBX Environments

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  1. Technical Strategy: Secure SIP Trunking in Legacy PSTN/PBX Environments Scott Beer Ingate scott@ingate.com Rich Poole Dialogic rich.poole@dialogic.com September 2, 2009 The SIP Trunking Enabler

  2. Agenda • How Are Gateways Used Today? • What Does A Gateway Do? • SIP Trunking Deployment – Issues & Options • Gateway Installation & Configuration

  3. How Are Gateways Used Today? Select Use Case Examples • Distributed IP Voice Messaging • Distributed IP Contact Center • Unified Communications: • Microsoft Office Communications Server 2007 • IBM Lotus Sametime Unified Telephony • Motorola Total Enterprise Access & Mobility • Asterisk Business Edition • Fax over IP • SIP Trunking

  4. How are Gateways Used in the Enterprise? IP Voice Messaging Use Case* Digital Station Phones Centralized Messaging / IVR Brussels Digital Station Emulation Media Gateway Nortel Meridian LAN T1 Media Gateway Munich WAN Avaya G3 PBX E1 Media Gateway Siemens Hicom Legacy Phones Legacy Phones Analog Media Gateway PSTN Ericsson MD110 Stockholm Legacy Phones Headquarters Remote Offices * - Please refer to ‘USE CASE(S)’ portion of the Legal Notice on the last slide

  5. How are Gateways Used in the Enterprise? Distributed IP Contact Center Use Case* Media Gateway * - Please refer to ‘USE CASE(S)’ portion of the Legal Notice on the last slide

  6. MS UC Mediation Server Basic Media Gateway legacy PBX “Tanjay” phones PSTN Active directory Basic Hybrid Media Gateway Microsoft® Office Communicator 2007 How are Gateways Used in the Enterprise? Microsoft® Office Communications Server 2007 Use Case* OCS Server(s) * - Please refer to ‘USE CASE(S)’ portion of the Legal Notice on the last slide

  7. How are Gateways Used in the Enterprise?IBM® Lotus®Sametime® Unified Telephony Use Case* T1/E1 T1/E1 * Please refer to ‘USE CASE(S)’ portion of the Legal Notice on the last slide.

  8. How are Gateways Used in the Enterprise? Motorola TEAM (Total Enterprise Access & Mobility) Use Case* “The TEAM VoWLAN solution turns the desktop into a pocketable virtual office.” www.motorola.com • - Please refer to ‘USE CASE(S)’ portion of the Legal Notice on the last slide

  9. How are Gateways Used in the Enterprise? Media Gateway + Asterisk Business Edition Use Case* Asterisk Business Edition Media Gateway Media Gateways Enable Applications Built on Asterisk Business Edition Allows Asterisk Developers to Augment Existing PBX Functionality * - Please refer to ‘USE CASE(S)’ portion of the Legal Notice on the last slide

  10. How are Gateways Used in the Enterprise? FoIP Server Solution Use Case* Enables FoIP Server in TDM and Hybrid PBX Environment Enables Fax Server to be Deployed as a Virtual Server Enables Centralized Fax Servers for Multi-Site Organizations T.30 Fax T.38 FoIP Media Gateway PSTN FoIP software-based Fax Server PBX Media Gateway WAN Remote Site PBX • - Please refer to ‘USE CASE(S)’ portion of the Legal Notice on the last slide

  11. Legacy PBX with system phones How are Gateways Used in the Enterprise? SIP Trunking for Legacy PBX and Contact Centers IP Telephony Service Provider IP Network PSTN Service Provider Gateway Broadband Internet Access Circuit Switched Voice Access (Optional) SIP Trunking Service Border Element Firewall Circuit Switched Voice Access Corporate Voice and Data LAN VoIP Gateway • - Please refer to ‘USE CASE(S)’ portion of the Legal Notice on the last slide

  12. What does a Gateway Do?

  13. -Inputs/Outputs Legacy PBX with system phones What does the Gateway do? IP Telephony Service Provider IP Network PSTN TDM Interface Transport: T1 or DS3 [Dig. Station Emulation, Analog] Signaling: ISDN PRI, QSIG [CAS, Serial (SMDI, MCI, MD-110)] Voice: PCM Service Provider Gateway Broadband Internet Access Circuit Switched Voice Access (Optional) SIP Trunking Service Border Element Firewall Circuit Switched Voice Access Corporate Voice and Data LAN VoIP Gateway IP Interface: Transport: IP Signaling: SIP over UDP, TCP (or TLS) Voice: G.7xx over RTP/RTCP (or sRTP) QoS:DiffServ Management Interface: Config:HTTP (or HTTPs) Web GUI [Telnet, Serial, RS-232] Event Mgt.: SNMP, SMTP SW Mgt.:BootP, TFTP • - Please refer to ‘USE CASE(S)’ portion of the Legal Notice on the last slide

  14. Legacy PBX with system phones What does the Gateway do? -Internal Bearer Bearer Processing: Voice: - G.711, G.729AB, G.723.1, etc. - G.168 Echo Cancellation - VAD, SS, CNG - [other codecs] Tones: - DTMF Digit Relay (RFC2833 or SIP Info) - Call Progress Detection (PVD, PAMD, DTMF, Fax Tone, Progress Tone, …) Fax: - T.38 Fax over IP, G.711 Fax Bypass (T.30/G.711) IP Telephony Service Provider IP Network PSTN Service Provider Gateway Broadband Internet Access Circuit Switched Voice Access (Optional) SIP Trunking Service Border Element Firewall Circuit Switched Voice Access Corporate Voice and Data LAN VoIP Gateway Additional Controls: - Gain Control for IP-TDM & TDM-IP - Echo Cancellation Parameter - Voice Activity Filters - Call Progress Filters Transport Mediation: Transport: TDM-to-SIP TDM-to-TDM SIP-to-SIP • - Please refer to ‘USE CASE(S)’ portion of the Legal Notice on the last slide

  15. Legacy PBX with system phones What does the Gateway do? -Internal Processing Supplementary Services: • Hold/UnHold • Call Transfer • Blind Transfer • Supervised Transfer • Message Waiting Indicator (MWI) • ANI / DNIS / Call Diversion Info • CPID IP Telephony Service Provider IP Network PSTN Service Provider Gateway Broadband Internet Access Circuit Switched Voice Access (Optional) SIP Trunking Service Border Element Firewall Circuit Switched Voice Access Corporate Voice and Data LAN VoIP Gateway Call Routing: • Digit Manipulation • Call Routing Engine • Alternate Routing for TDM & IP • Trunk Group Management • IP Route Management • Call Processing: • Call Setup/Teardown • Codec Negotiation • Fax Negotiation • DTMF Digit Relay • - Please refer to ‘USE CASE(S)’ portion of the Legal Notice on the last slide

  16. SIP Trunking Deployment Issues & Options

  17. How are Gateways Deployed for SIP Trunking? • Issues: • Do I need to move all communciations to SIP? • How do I handle multiple offices & optimize deployments? • Bandwidth Requirements • How much is used already for data • Need to prioritize voice (more real-time) • Gateway & PBX Interop • Availability Considerations • Multiple Gateways • Alternate Routing • Failover upon power failure • How do you handle Fax?

  18. Evolution of IP Fax (FoIP) • T.37 • Store and forward • Scan image, attach to email, and send • Not real time – no receipt confirmation • G.711 Pass Through • Encode fax audio for IP transport • Heavy bandwidth requirements • Susceptible to latency – high failure rate • T.38 FoIP • Created by the ITU to resolve the above issues

  19. T.38 – Reliable IP Fax: • Standard for real time IP Fax defined by ITU • Widely adopted by router manufacturers • Resolves latency issue that plagues G.711 • Uses much less bandwidth • ~ 35% of the bandwidth required by G.711 • Preserves user experience • Positive receipt confirmation • Compliant to industry standards • Not T.37 store and forward as an email attachment • Dialogic was a primary contributor to the T.38 spec

  20. Legacy Configuration Use Case* IP Network PSTN Circuit Switched Trunking Broadband Internet Access Firewall Corporate LAN Legacy PBX • - Please refer to ‘USE CASE(S)’ portion of the Legal Notice on the last slide

  21. SIP Trunking for Legacy PBX and Contact Centers Phased SIP Trunking – Outbound Only Use Case* IP Telephony Service Provider PSTN IP Network Service Provider Gateway Broadband Internet Access SIP Trunking Service Border Element Fax Firewall Circuit Switched Voice Access • Outbound traffic: Routed through SIP Trunking • Inbound traffic: Continues to be routed to PSTN • Fax: Routed through PSTN • Routing outbound calls to SIP Trunks could lower costs* • Route outbound traffic to Gateway (except from Fax extensions) • PSTN connection still available as alternate route for outbound traffic* • * Requires program change to PBX) Corporate Voice and Data LAN Legacy PBX PSTN-VoIP Gateway Inbound Outbound • - Please refer to ‘USE CASE(S)’ portion of the Legal Notice on the last slide

  22. SIP Trunking for Legacy PBX and Contact Centers Phased SIP Trunking – PSTN Alt Route Use Case* IP Telephony Service Provider PSTN IP Network Service Provider Gateway Broadband Internet Access SIP Trunking Service Border Element Alt Route Fax Firewall Circuit Switched Voice Access Corporate Voice and Data LAN Legacy PBX • Outbound traffic: Routed to SIP Trunking • Inbound traffic: Routed to SIP Trunking • Fax: Routed through Gateway to/from PSTN • No or minimal change to PBX • Legacy PSTN available as Alternate Route for overflow traffic or as backup to SIP Trunks (IP or Power Failure) PSTN-VoIP Gateway Inbound Outbound • - Please refer to ‘USE CASE(S)’ portion of the Legal Notice on the last slide

  23. SIP Trunking for Legacy PBX and Contact Centers Full SIP Trunking Solution Use Case* IP Telephony Service Provider PSTN IP Network Service Provider Gateway Broadband Internet Access SIP Trunking Service Border Element Fax Firewall Circuit Switched Voice Access Corporate Voice and Data LAN Legacy PBX • Outbound traffic: Routed to SIP Trunking • Inbound traffic: Routed to SIP Trunking • Fax: Routed through Gateway • No or minimal change to PBX • Disconnection from legacy PSTN – lower costs • T.38 is preferred for fax, but G.711 Fax Relay may be acceptable PSTN-VoIP Gateway Inbound Outbound • - Please refer to ‘USE CASE(S)’ portion of the Legal Notice on the last slide

  24. SIP Trunking for Legacy PBX and Contact Centers Remote Office SIP Trunking - Centralized Use Case* PSTN IP Telephony Service Provider PSTN IP Network Legacy PBX Circuit Switched Voice Access Broadband Internet Access SIP Trunking Service Border Element Remote Office Firewall Corporate Voice & Data LAN Legacy PBX Corp Intranet Circuit Switched Voice Access Corporate Voice & Data LAN VoIP Gateway • Corporate traffic over Intranet – lower costs • Concentrate PSTN access through SIP Trunks • OptionalRemote PSTN Access through gateway • Reduced remote legacy PSTN – lower costs • - Please refer to ‘USE CASE(S)’ portion of the Legal Notice on the last slide

  25. SIP Trunking for Legacy PBX and Contact Centers Remote Office SIP Trunking – Distributed Use Case* PSTN IP Telephony Service Provider IP Network IP Network SIP Trunking Service SIP Trunking Service Broadband Internet Access Remote Office Border Element Corporate Voice & Data LAN Corp Intranet Legacy PBX Circuit Switched Voice Access Corporate Voice & Data LAN VoIP Gateway • Corporate data traffic over Intranet • Leverage ITSP Network with remote SIP Trunks • Remote PSTN available through gateway, if needed • - Please refer to ‘USE CASE(S)’ portion of the Legal Notice on the last slide

  26. Gateway Installation & Configuration

  27. Installation Summary • Connection to PBX • Connect Gateway to PBX • Configure PBX to send calls to Gateway • Configure Gateway to connect to PBX • Connection to LAN • Connect Gateway to LAN • Configure SIP Trunking Provider to connect to Gateway • Configure Gateway to connect to SIP Trunking Provider • Test connections to PBX and SIP Trunking Provider

  28. Gateway Configuration • Simplified Configuration Management & Troubleshooting

  29. Summary 89% Growth! • SIP Trunking demand is accelerating and moving upstream from SMB to the Enterprise • Ingate SIParator® and Ingate Firewall® products provide a secure, scalable and interoperable enterprise edge for SIP Trunking Services • Dialogic provides enterprise class media gateways to enable SIP trunking for legacy PBX and contact centers • Ingate and Dialogic provide interoperable products that enable a rapid return on investment from SIP Trunking deployments • SIP Trunk adoption moves an enterprise towards richer multi-media and unified communications services across public IP networks +

  30. Questions? • For more information visit: • www.dialogic.com/solutions/uc/ingate.htm • www.dialogic.com/products/gateways/ • www.ingate.com … or contact us directly • Rich Poole: rich.poole@dialogic.com • Scott Beer: scott@ingate.com Thanks for attending!

  31. Dialogic, Dialogic Pro, Brooktrout, Diva, Cantata, SnowShore, Eicon, Eicon Networks, NMS Communications, NMS (stylized), Eiconcard, SIPcontrol, Diva ISDN, TruFax, Exnet, EXS, SwitchKit, N20, Making Innovation Thrive, Connecting to Growth, Video is the New Voice, Fusion, Vision, PacketMedia, NaturalAccess, NaturalCallControl, NaturalConference, NaturalFax and Shiva, among others as well as related logos, are either registered trademarks or trademarks of Dialogic Corporation or its subsidiaries (“Dialogic”). Ingate, Ingate Firewall, and Ingate SIParator are registered trademarks of Ingate Systems AB. Other names of actual companies and products mentioned herein are the trademarks of their respective owners. Dialogic encourages all users of its products to procure all necessary intellectual property licenses required to implement their concepts or applications, which licenses may vary from country to country. Dialogic may make changes to specifications, product descriptions, and plans at any time, without notice. USE CASE(S)Any use case(s) shown and/or described herein represent one or more examples of the various ways, scenarios or environments in which Dialogic products can be used.  Such use case(s) are non-limiting and do not represent recommendations of Dialogic as to whether or how to use Dialogic products. 06/09 www.dialogic.com

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