Hello list,
I've run into a bizarre problem with a specific situation involving call forwarding.
Asterisk is registered to a Nortel MCS5200 system using SIP. I can make outgoing calls and get incoming calls no problem for both internal calls and calls to/from the PSTN (the Nortel MCS connects to a bunch of Audiocodes PRI GW using SIP for PSTN access).
The issue I encounter is when I call forward my centrex line at the office to the DID associated with my SIP account on the MCS5200. If someone calls my office number it gets call forwarded as expected to my DID through the PSTN. The PSTN dials the Audiocodes GW which then signals the MCS5200 and finally my * system. The phones connected to * ring, I answer and get no media. The person calling gets the communication cut off (hangup). I get the following error on the * console:
Nov 17 11:34:16 WARNING[-1092846672]: chan_sip.c:2676 process_sdp: Insufficient information for SDP (m = '', c = '')
Nov 17 11:34:16 WARNING[-1092846672]: chan_sip.c:4914 get_rdnis: Huh? Not an RDNIS SIP header ()?
This only happens if I get an incoming call that comes from a forwarded line. Just to be sure, I registered a Sipura SPA-2000 directly to the MCS5200 and that works fine. This leads me to beleive I am missing some parameter in my config or that there is some sort of bug in *.
Here is the relevant sip.conf portion (I'm running * 1.0.0) :
[mcs5200] type=friend secret=secret username=username fromuser=username fromdomain=whateverdomain.ca host=mcsaddress.ca disalow=all allow=ulaw insecure=very dtmfmode=inband
Not sure what to think of this one. I've done lots of searching but didn't come up with anything...
Any help appreciated.
-Regards,
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