Hello,
didn't looked at traces, but in the past MS SIP stuff had issues with
record routing. Make sure you turn on enable_full_rr parameter of rr module.
http://www.openser.org/docs/modules/1.2.x/rr.html#AEN89
Another issue might be related to codecs, might be that exchange does
not like asterisk codec, put is less probable.
Cheers,
Daniel
On 03/06/07 15:29, Benko wrote:
Hello!
I'm struggling with a issue since several days, since i make no more
efforts i'd like to ask you for help:
I'm trying to attach a exchange 2007 server to openser, most of the
features work(inbound call, refer) but i can't get a outbound call to
work as exc doesn't seem to like the SDP in my "200 OK" answer, i get no
ACK and no rtp-stream is sent from exchange. My setup looks like this:
________ _______ _____ ________
|asterisk|=======|openser|======|(NAT)|=======|exchange|
|________| |_______| |_____| |________|
2x.x.x.107 2x.x.x.106 62.x.x.193 10.1.99.97
A rtpproxy is running on the openser too, exchange is talking tcp...
In my openser-config i use the nathelper-module and rtpproxy to
traverse nat for the clients. This setup is working for all phones i've
tested so far, so imho it is useable.
Exchange has a feature that allows dialouts to read voicemail to e.g.
a mobile phone. It is using a standard INVITE dialog, in a local
network without nat i've been succesfull to attach exchange to sipx and
a phone registered at sipx and i guess it will also work with a local
openser who doesn't use nat-traversal features.
However, with the public openser where i have a NAT, exchange doesn't
seem to accept my sdp-proposal, i get no ACK and the rtp stream is only
sent by asterisk, not by exchange.
Unfortunately exchange offers no valuable debugging information, so i
have no idea what exactly it doesn't like about my answer - i did some
trial and error with different nat-helper-functions, activated and
deactivated them but so far it didn't make a difference(or the call
didn't got through at all due to missing nat-traversal).
I've uploaded wireshark-traces exported to text of the
working local dialog with sipX(http://pastebin.ca/383516) and the
non-working external dialog (http://pastebin.ca/383540) with
openser, maybe someone can take a look at it and check if
there's something wrong on my(=openser) side of the dialog - Thanks in
advance!
best regards
Christian
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