AudioCodes Mediant 2000 User Manual page 291

SIP User's Manual
Scenario: In this example, the Enterprise wishes to connect its TDM PBX to two different
ITSPs, by implementing the 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 must 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 this example setup:
Figure 18-25: Example Setup for Routing Between ITSP and Enterprise PBX
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To configure call routing between an Enterprise and two ITSPs:
1. Enable the device to register to a Proxy/Registrar server using the parameter
IsRegisterNeeded.
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18. GW and IP to IP
November 2011