Hi all,
I found the following problem on my test sipx (015027) machine: under certain circumstances there is no voice for remote worker. Here is the detailed description of my setup: I use YATE (http://yate.null.ro) as h323-sip gateway between my sipx and avaya ip office (due to some problems with sip in avaya). YATE is configured to relay media. And YATE is running on the same machine as sipx, but uses port 5059 for sip, and ports 16384 - 18000 for rtp. Sipx has dns name sipx3.lab.nstel.ru and ip address 172.23.19.5 (/24). Network 172.23.0.0/16 is declared local (intranet) for sipx. Intranet domains are *.sipx3.lab.nstel.ru *.yate.lab.nstel.ru Remote workers can either use vpn connection, which does not differ much from local users, or use sipx nat traversal feature. External (nat'ed into internal) ip address is 81.211.30.104 and is named vpn.nstel.ru in the external dns. When a user dials 9 and 7digits the call is routed to yate and then to pstn. The problem is that: When user 3853 (eyebeam), registered trough vpn (Contact: <sip:[email protected]:51860;transport=TCP>), dials 96414045 the call is set up and voice is ok. Call-id MTQ3ODFjZDBmNGFiOTliNWFmMDZjNTFhYjVlZTAyZTA. in the attached merged.xml file. But when the same user is registered using nat-traversal, and dialing the same number, the call is set up, but there is no voice. Call-id NGVlMWUzY2RkMDA1M2ViMTEzYTc0N2RjYTRhODU2MzQ. in the attached merged.xml file. My analysis of the problem is that, in the second (problematic) case, sipxproxy substitutes media ports when forwarding Invite (frames 26 and 41 in the merged.xml) and 200 Ok (frames 44,47) messages. Such substitution does not occur in the first case, and, I believe, should not occur in the second case. I think that it is the cause of my problem. Can somebody please verify if my analysis is correct? Is it a bug, or a configuration problem? The whole snapshot is available at ftp://sipx:[email protected]/sipx-configuration-sipx3.lab.nstel.ru.tar.gz Thanks and regards, Nikolay.
merged.xml.gz
Description: GNU Zip compressed data
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