1. Peering & Routing Designs Using Session Controllers & Media Gateways James Rafferty Voice Peering Forum March 8, 2007

2. Cantata Technology, Inc. confidential. Not for distribution without permission. 2 October 6, 2015 Agenda  Cantata Overview  Topic Overview  Roles and Relationships –TDM to IP network –All IP networks  Applications and Case Studies  Summary

3. Cantata Technology, Inc. confidential. Not for distribution without permission. 3 October 6, 2015 About Cantata Technology  Leading provider of enabling technology for the enterprise and service provider markets.  Formed by the combination of Excel Switching and Brooktrout Technology  Founded in 1984  300+ employees worldwide  Global company –Headquarters in Needham, Massachusetts –Principal offices in MA, NH, CA, Belgium, and Japan  Distribution: –Enterprise: distributor and reseller network, direct OEM –Service Providers: regional distributors, direct OEM sales  Unique partner philosophy

4. Cantata Technology, Inc. confidential. Not for distribution without permission. 4 October 6, 2015 Overview – Evolving Voice Network  Voice network evolution Trends –PSTN  Hybrid  IP –IP network islands  Federations of IP  Creates need to connect all of the various network possibilities –Traditional – connect via Tier 1 carrier –Peering Model – connect directly between co- located carriers

5. Cantata Technology, Inc. confidential. Not for distribution without permission. 5 October 6, 2015 Complicating Factors  Signaling –Multiple Signaling protocols IP – SIP, H.323, H.248 TDM – SS7 ISUP, ISDN PRI, CAS  Media –Various voice codecs –Need support for fax, data and tones  Business –Carriers need to agree to work together, then they can solve the technical matters

6. Cantata Technology, Inc. confidential. Not for distribution without permission. 6 October 6, 2015 Stepping Into the Breach  Solving the signaling problem –Integrated media / signaling gateways can interwork between the PSTN and IP networks SBCs sometimes used for mediation of signaling between IP networks  Solving the media problem –Media gateways can transcode between different media formats (voice, fax, tones)  Solving the Routing problem –Calls can be routed either by SBC or MGW routing engine –May want to use ENUM for PSTN -> SIP address translation  Connecting the Islands –VoIP Carriers can connect either directly or via a peering fabric –Direct IP connection is possible, but SBCs typically patrol the borders

7. Cantata Technology, Inc. confidential. Not for distribution without permission. 7 October 6, 2015 Cantata’s Integrated Media Gateway IMG 1010  Provides Essential Media Support –Broad range of VoIP/wireless codecs and T.38 IP fax  Any to Any signaling –SS7 ISUP, ISDN, CAS*, SIP and H.323  Address Translation –Use ENUM for E.164 phone number -> SIP *  Available in both TDM-IP gateway and IP-IP models  Compact 1U footprint, scalable from 96 to 768 ports –DS3, T1 and E1 interfaces all available  Backed by a world class Cantata support team * Available Q1, 2007

8. Cantata Technology, Inc. confidential. Not for distribution without permission. 8 October 6, 2015 Making the Connection: TDM -> IP IMG1010 Media Gateway TDM Carrier SS7+TDM ISDN / CAS SIP/H.323 IP Carrier Media Gateway Functions: PSTN-to-IP Connection >Media >Signaling >Routing Media Gateway Functions: PSTN-to-IP Connection >Media >Signaling >Routing Call 1 – TDM - TDM Call 2 – TDM - IP

9. Cantata Technology, Inc. confidential. Not for distribution without permission. 9 October 6, 2015 Making the Connection: TDM/IP to IP IMG1010 Media Gateway TDM Carrier SS7+TDM ISDN / CAS IP Carrier 1 Media Gateway Functions: PSTN-to-IP Connection >Media >Signaling >Routing Media Gateway Functions: PSTN-to-IP Connection >Media >Signaling >Routing Call 1 – TDM - TDM Call 2 – TDM – IP – Carrier 1 IP Carrier 2 Session Border Controller SIP / H.323 Call 3 – IP – IP – Carrier 1 -> 2 SIP SBC Functions: IP-to-IP connection >Firewall and NAT traversal >Policy enforcement >Security >Signaling Interwork (SIP, H.323) SBC Functions: IP-to-IP connection >Firewall and NAT traversal >Policy enforcement >Security >Signaling Interwork (SIP, H.323)

10. Cantata Technology, Inc. confidential. Not for distribution without permission. 10 October 6, 2015 TDM/IP to IP with Peering IMG 1010 Media Gateway TDM Carrier SS7+TDM ISDN / CAS IP Carrier 1 Media Gateway Functions: PSTN-to-IP Connection >Media >Signaling >Routing IP to IP Connection >Transcoding > ENUM address translation Media Gateway Functions: PSTN-to-IP Connection >Media >Signaling >Routing IP to IP Connection >Transcoding > ENUM address translation IP Carrier 2 Session Border Controller SIP / H.323 SIP SBC Functions: IP-to-IP connection >Firewall and NAT traversal >Policy enforcement >Security >Signaling Interwork (SIP, H.323) SBC Functions: IP-to-IP connection >Firewall and NAT traversal >Policy enforcement >Security >Signaling Interwork (SIP, H.323) Peering Fabric offers simpler connections among carriers SIP / H.323 RTP SIP Call 1 – IP – IP (transcode iLBC -> G.729)

11. Cantata Technology, Inc. confidential. Not for distribution without permission. 11 October 6, 2015 Summary  Transition from TDM to IP networks underway  Carriers need to connect between diverse networks  Cantata’s IMG 1010 provides TDM – IP signaling, address and media translation –Also transcoding for all-IP networks  Cantata partners with SBC vendors to meet overall carrier needs  IMG can be coupled with SBCs and Peering Fabrics to support a wide variety of connections and call flows