Appendix A. More About SIP
8.The Telecommuting Module checks if there is a matching row in the Dial Plan table.
9.The Telecommuting Module checks if the SIP packet
After finding something to guide it in routing the packet, the Telecommuting Module proceeds to the next list, which tells it where to send the packet (if it hasn’t already sent a 404 reply). This list is also searched until a match is found.
1.The Telecommuting Module sends the SIP packet to the Outbound Proxy if one has been entered.
2.The Telecommuting Module checks for the SIP domain of the
3.If there are still unresolved domain names, the Telecommuting Module makes an ordi- nary DNS lookup.
SIP Packet Headers
This is a list of the more common SIP packet headers, and advice on how to modify them using different settings in the Telecommuting Module.
The
When the Telecommuting Module acts as registrar for the domain of the RURI, it rewrites the RURI from user@domain into whatever the user gave as its Contact when it registered.
When the incoming RURI is one that the Telecommuting Module has previously substituted in a Contact header, the RURI is also rewritten.
When an XF account is used, the domain part of the incoming RURI will be changed into the domain of the XF account.
From
The From header contains the SIP user who sent the SIP request.
The Telecommuting Module only changes the From header when the
To
The To header contains the SIP user who should receive the SIP request.
The Telecommuting Module only changes the To header when an XF account is used.
Contact
The Contact header tells on which address the SIP client wants to be contacted.
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