Sip Trunking Between Enterprise And Itsps; Figure 9-7: Example Setup For Routing Between Itsp And Enterprise Pbx - AudioCodes Mediant 2000 User Manual

9.19

SIP Trunking between Enterprise and ITSPs

By implementing the device's enhanced and flexible routing configuration capabilities using
Proxy Sets, IP Groups, and Accounts, you can "design" complex routing schemes. This
section provides an example of an elaborate routing scheme for SIP trunking between an
Enterprise's PBX and two Internet Telephony Service Providers (ITSP), using AudioCodes'
device.
Scenario:In this example, the Enterprise wishes to connect its TDM PBX to two different
ITSPs, by implementing a device in its network environment. It's main objective is for the
device to route Tel-to-IP calls to these ITSPs according to a dial plan. The device is to
register (on behalf of the PBX) to each ITSP, which implements two servers for redundancy
and load balancing. The Register messages are to use different URI's in the From, To, and
Contact headers per ITSP. In addition, all calls dialed from the Enterprise PBX with prefix
'02' is sent to the local PSTN. The figure below illustrates the example setup:

Figure 9-7: Example Setup for Routing Between ITSP and Enterprise PBX

SIP User's Manual 442
Mediant 2000
Document #: LTRT-68809