Re: [Users] sdp negotiation fails - no ACK - rtpproxy

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 > > _______________________________________________ > Users mailing list > Users(a)openser.org > http://openser.org/cgi-bin/mailman/listinfo/users > >