We are trying asterisk, the problem is not called back to the original channel after leaving it on hold. This occurs when the SUA is also another client, if Xlite works well. this may not sending an ACK? that works with Xlite? have influence on this codec used by SUA? thank you very much for the help. Lionel. -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20080616/6f292669/attachment.html