I forgot to add, that from tcpdump trace (and from log) one can see that FS does not send answer to IPOffice. _____ From: freeswitch-users-bounces@lists.freeswitch.org [mailto:freeswitch-users-bounces@lists.freeswitch.org] On Behalf Of Nikolay Kondratyev Sent: Wednesday, February 10, 2010 1:49 PM To: freeswitch-users@lists.freeswitch.org Subject: [Freeswitch-users] h323 - sip call is not working Hi all, I compiled FreeSWITCH Version 1.0.5-20100209-0400 (16587M) with mod_h323. When I call from h323 (Avaya IPOffice) to local fs extention (x-lite) I hear ring back, but when x-lite picks up, he hears silence, while IPOffice user continues to hear ringback. The log is at the http://pastebin.freeswitch.org/12091 My configuration is almost default, several local extentions added, and h323.conf from http://wiki.freeswitch.org/wiki/Mod_h323 5840 - user at IPOffice 2853 - x-lite registered at FS IPOffice ip address: 172.23.14.2 FS ip address 172.23.22.49 Can anybody please advise how to solve that? Is it a configuration or a software problem? Thanks in advance, Nikolay.