AudioCodes Mediant 500L User Manual page 751

User's Manual
The basic SIP call flow for INVITEs to and from the registered user is shown below:

To configure support for dual registration:
1. On the SIP entity (IP Phone), configure the primary and secondary proxy server
addresses as the IP address of the device and where each address has a different
SIP port number.
2. Open the SBC General Settings page (Setup menu > Signaling & Media tab > SBC
folder > SBC General Settings), and then from the 'Keep Original User in Register'
drop-down list, select Keep user; add unique identifier as URI parameter.
3. In the Message Manipulations table, configure the following rules:
•
Index 0:
♦
♦
♦
♦
•
Index 1:
Version 7.2
Manipulation Set ID: 1
Action Subject: header.contact.url.ac-int
Action Type: Modify
Action Value: '1'
751 Mediant 500L Gateway & E-SBC
39. Advanced SBC Features