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

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

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

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 Stockholm Ericsson MD110 Legacy Phones Headquarters Remote Offices * - Please refer to ‘USE CASE(S)’ portion of the Legal Notice on the last slide

How are Gateways Used in the Enterprise How are Gateways Used in the Enterprise? Distributed IP Contact Center Use Case* The last application for media gateways I want to touch on today is the IP contact center. IP transition in the contact center has really well defined benefits Remote agent support Off-load peak hours to other sites Off-shoring via VoIP Desktop IP soft phones, headsets and CTI data: agents = true knowledge workers Multi-media / multi-modal communications – e-mail, chat, click to call, and soon video Distributed architectures which scale well and can support multiple sites The access to the PSTN for an IP contact center is through media gateways, and as the market continues to grow for IP contact centers in a range of densities, so too the market for supporting media gateways. Dialogic works with a number of leading contact center technology and solution providers and our gateways our increasingly designed in to their solutions. Media Gateway * - Please refer to ‘USE CASE(S)’ portion of the Legal Notice on the last slide

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

How are Gateways Used in the Enterprise 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.

How are Gateways Used in the Enterprise 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

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

FoIP software-based Fax Server 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 PBX FoIP software-based Fax Server Media Gateway Remote Site WAN PBX - Please refer to ‘USE CASE(S)’ portion of the Legal Notice on the last slide 10

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

What does a Gateway Do?

What does the Gateway do? -Inputs/Outputs 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 SIP Trunking Service Broadband Internet Access Circuit Switched Voice Access (Optional) Border Element Firewall Circuit Switched Voice Access Legacy PBX with system phones . 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

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 SIP Trunking Service Broadband Internet Access Circuit Switched Voice Access (Optional) Border Element Firewall Circuit Switched Voice Access Legacy PBX with system phones . Corporate Voice and Data LAN VoIP Gateway Transport Mediation: Transport: TDM-to-SIP TDM-to-TDM SIP-to-SIP Additional Controls: - Gain Control for IP-TDM & TDM-IP - Echo Cancellation Parameter - Voice Activity Filters - Call Progress Filters - Please refer to ‘USE CASE(S)’ portion of the Legal Notice on the last slide

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 SIP Trunking Service Broadband Internet Access Circuit Switched Voice Access (Optional) Border Element Firewall Circuit Switched Voice Access Legacy PBX with system phones 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

SIP Trunking Deployment Issues & Options

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?

Evolution of IP Fax (FoIP) 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

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

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

SIP Trunking for Legacy PBX and Contact Centers 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 Inbound Fax Broadband Internet Access SIP Trunking Service Border Element Outbound Firewall Legacy PBX 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 PSTN-VoIP Gateway - Please refer to ‘USE CASE(S)’ portion of the Legal Notice on the last slide

SIP Trunking for Legacy PBX and Contact Centers SIP Trunking for Legacy PBX and Contact Centers Phased SIP Trunking – PSTN Alt Route Use Case* IP Telephony Service Provider PSTN IP Network Fax Alt Route Service Provider Gateway Broadband Internet Access SIP Trunking Service Border Element Inbound Outbound Firewall Legacy PBX Circuit Switched Voice Access Corporate Voice and Data LAN 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 - Please refer to ‘USE CASE(S)’ portion of the Legal Notice on the last slide

SIP Trunking for Legacy PBX and Contact Centers 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 Inbound Outbound Fax Border Element Firewall Circuit Switched Voice Access Legacy PBX Corporate Voice and Data LAN 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 - Please refer to ‘USE CASE(S)’ portion of the Legal Notice on the last slide

SIP Trunking for Legacy PBX and Contact Centers SIP Trunking for Legacy PBX and Contact Centers Remote Office SIP Trunking - Centralized Use Case* Circuit Switched Voice Access PSTN IP Telephony Service Provider Legacy PBX PSTN IP Network SIP Trunking Service Broadband Internet Access Corporate Voice & Data LAN Corp Intranet Remote Office Border Element Firewall Legacy PBX Circuit Switched Voice Access Corporate Voice & Data LAN VoIP Gateway Corporate traffic over Intranet – lower costs Concentrate PSTN access through SIP Trunks Optional Remote 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

SIP Trunking for Legacy PBX and Contact Centers SIP Trunking for Legacy PBX and Contact Centers Remote Office SIP Trunking – Distributed Use Case* PSTN IP Telephony Service Provider SIP Trunking Service IP Network Corporate Voice & Data LAN Corp Intranet Remote Office IP Network SIP Trunking Service Broadband Internet Access Border Element 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

Gateway Installation & Configuration

Installation Summary Connection to PBX Connection to LAN 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

Gateway Configuration Simplified Configuration Management & Troubleshooting Initial Config Use Serial Cable or Telnet to GW; Login; run ‘quickcfg’ Set IP Address / Subnet for Gateway & Default Network Gateway Set T1/E1 & PBX Signaling Type (ISDN / CAS) Restart Gateway Web GUI Login to Gateway Disable BootP (else GW gets IP Addr from DHCP Server) TDM Config Set PCM Coding – µLaw (T1) , aLaw (E1) Per span, set Line Encoding & Framing (e.g.: B8ZS & ESF) Per ISDN span, set to “Network” or “Terminal” (Opposite of endpoint) Enable “Failover” if Gateway is between PBX & PSTN VoIP Config Set IP Transport to UDP, TCP (or TLS) Set Audio Compression – G.711-µLaw , G.711-aLaw, … Set VAD on/off Set RFC3960 Early Media on Routing Config Set up TDM Trunk Group(s) (e.g. PSTN, PBX, etc.) Set up VoIP Host Group(s) (IP Endpoints) Config Inbound TDM rules per Trunk Group – Specify Routing & Normalization Config Inbound VoIP rules per VoIP Host Group & Number Normalization Make Connections Use built-in Trace Tools, Wireshark, ... to verify proper operation Ready to use

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 +

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!

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