
Version 5.6 353 November 2008
SIP User's Manual 7. IP Telephony Capabilities
Figure 7-19: SIP Trunking Example Architecture
¾ To configure call routing between Enterprise and two ITSPs using
the device, take these 9 steps:
1. Enable the device to register to a Proxy / Registrar server, using the parameter
IsRegisterNeeded in the 'Proxy & Registration' page (refer to ''Proxy & Registration
Parameters'' on page 112).
2. In the 'Proxy
Sets Table' page (refer to ''Proxy Sets Table'' on page 120), co
nfigure two
Proxy Sets and for each, enable Proxy Keep-Alive (using SIP OPTIONS) and 'round
robin' load-balancing method:
• Proxy Set #1 includes two IP addresses of the first ITSP (ITSP 1) - 10.33.37.77
and 10.33.37.79 - and using UDP.
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