1. Peering with IP PBXs James Rafferty VoIP Peering Workshop Internet Telephony January 25, 2007

2. Agenda
Overview
Extending the Reach of VoIP
Application Examples
Standards and Other Resources
Summary

3. Overview
VoIP Peering is gaining popularity as a simpler means of connecting VoIP Calls
VoIP Peering enables carriers and enterprises to connect more directly for IP Communications
Examples to follow

4. Extending the Reach of VoIP
Traditionally there was always a connection to the Public Switched Telephone Network
SIP Trunking enables enterprises to bypass the PSTN and connect their people via IP
Combo of SIP Trunking plus VoIP Peering extends the reach of VoIP
Enables enterprises to bypass both the PSTN and the Internet
Other IP tools such as ENUM can reduce toll charges related to the PSTN

5. SIP Trunking Connect to Internet via SIP IMG translates between H.323
Phone
IP PBX
IP Fax Server
Connect to Internet via SIP
IMG translates between H.323
and SIP
Support for VoIP & FoIP calls
H.323
IMG 1010 Media Gateway
SIP
IP Network
SR140
IP Fax IP
Phone
SIP Trunking for VoIP/FoIP

6. SIP Trunking + VoIP Peering
Phone
IP PBX
IP Fax Server
Connect to Peering Fabric via SIP
IMG translates between H.323
and SIP
Support for VoIP & FoIP calls
Gain IP benefits without Internet
security risks
H.323
IMG 1010 Media Gateway
SIP
Peering
Fabric
SR140
IP Fax IP
Phone
SIP Trunking for VoIP/FoIP

7. VoIP Transcoding Services
Phone
IP PBX IP
Phone
Connect to VPF with G.711 voice
Service from Waveleap provides
transcoding of G.711 to G.729
Able to connect to remote office
with compressed G.729
SIP + G.711
Xvon.net transcoding
From Waveleap
SIP + G.711
VPF™
SIP + G.729
IMG 1010 Media Gateway IP
Phone IP
Phone
SIP Trunking to Remote Office

8. ENUM Services Connect to Peering Fabric Lookup SIP address via ENUM
Phone
IP PBX IP
Phone
DNS
Server
Connect to Peering Fabric
Lookup SIP address via ENUM
service
Translate to SIP
URI
Connect to remote office via SIP,
saving phone chgs vs. PSTN
SIP + G.711
ENUM
Inquiry
SIP w < >
Peering
Fabric
SIP w SIP URI
IMG 1010 Media Gateway IP
Phone IP
Phone
SIP Trunking to Remote Office

9. Standards and Other Resources
SIP Forum has developed specifications for SIP Trunking
See the recommendations tab under
Internet Engineering Task Force has an active group on VoIP Peering known as SPEERMINT
Addresses technical issues related to VoIP Peering
See:

10. Summary
VoIP Peering extends the reach of enterprises
Combination of VoIP Peering and SIP Trunking enables more cost effective communication
Peering Service Providers can offer services which include transcoding and ENUM
Cantata and its partners offer technology and services that help enable VoIP Peering