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2005 May 31
1
SIP Authentication problem between Cisco router and Asterisk when calls are forwarded
...PRI provided
by a local telco (Allstream).
This Cisco accepts calls and sends them to a couple of servers running
Asterisk depending on which number was dialled.
But there is a problem.
When a call comes in to the Cisco from the PSTN it sends it to the
Asterisk server something like this:
FROM: 204XXXXXXX@<CISCO IP>
TO: 204NNNNNNN@<Asterisk IP>
Normally, this is no problem. The user 204XXXXXXX does not exist on the
Asterisk server because it is the callerid of someone on the PSTN.
However, if a number on the PSTN is forwarded to a number on the
Asterisk server, and then someone else on...