Sip Trunking Between Enterprise And Itsps - AudioCodes Mediant 800 MSBG User Manual

SIP User's Manual
4. Make a call. Pick up the phone connected to port #1 of the first device and dial 102 (to
the phone connected to port #2 of the same device). Listen for progress tones at the
calling phone and for the ringing tone at the called phone. Answer the called phone,
speak into the calling phone, and check the voice quality. Dial 201 from the phone
connected to port #1 of the first device; the phone connected to port #1 of the second
device rings. Answer the call and check the voice quality.
8.3.9.4

SIP Trunking between Enterprise and ITSPs

By implementing the device's enhanced and flexible routing capabilities, 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 the device.
Scenario: In this example, an Enterprise has deployed the device with FXS interfaces. The
first four phones operate with ITSP 1 (using UDP), while the next four phones (channels 5-
8) operate with ITSP 2 (using TCP). ITSP 1 requires single registration (i.e., one
registration for all four phones), while ITSP 2 requires registration per phone. Each ITSP
implements two servers for redundancy and load balancing. The figure below illustrates
this example setup:
Figure 8-38: Routing between ITSP and Enterprise PBX Example
Version 6.2 475
8. IP Telephony Capabilities
February 2011