Good morning Martin. RFC3261 says: " .... [Page 85] RFC 3261 SIP: Session Initiation Protocol June 2002 ... If the server retransmits the 2xx response for 64*T1 seconds without receiving an ACK, the dialog is confirmed, but the session SHOULD be terminated. This is accomplished with a BYE, as described in Section 15. " Why 32 seconds? Because almost always T1 = 500 ms. -> 64 * 500ms = 32 segs Why 200 OK are being re-transmited? Because someone in someplace is stopping 200 OKs or ACKs. Look for a router/FW and disable ALG for SIP support. Look for errors on headers. Best regards. -- Eduardo Lejarreta. -----Mensaje original----- De: sr-users-bounces(a)lists.sip-router.org [mailto:sr-users-bounces@lists.sip-router.org] En nombre de sr-users-request(a)lists.sip-router.org Enviado el: viernes, 21 de junio de 2013 0:18 Para: sr-users(a)lists.sip-router.org Asunto: sr-users Digest, Vol 97, Issue 79 Send sr-users mailing list submissions to sr-users(a)lists.sip-router.org To subscribe or unsubscribe via the World Wide Web, visit http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users or, via email, send a message with subject or body 'help' to sr-users-request(a)lists.sip-router.org You can reach the person managing the list at sr-users-owner(a)lists.sip-router.org When replying, please edit your Subject line so it is more specific than "Re: Contents of sr-users digest..." Today's Topics: 1. Fwd: Call breaks after 32 seconds (Martin Mou?ka) ---------------------------------------------------------------------- Message: 1 Date: Wed, 19 Jun 2013 14:36:53 +0200 From: Martin Mou?ka <moucka.m(a)gmail.com> To: sr-users(a)lists.sip-router.org Subject: [SR-Users] Fwd: Call breaks after 32 seconds Message-ID: <CAJY3ant7LG1xgO4ZjmSa0j-HfBbZtPUSvZ3kDkWiq7KD6XuhEw(a)mail.gmail.com> Content-Type: text/plain; charset="iso-8859-1" Hello, we have problem here with outbound calls. Many devices for example Zyxel, WELL 8820IP, Interbell and some software clients Ekiga v3.3.2 and SJ Phone drops call after 32 seconds. I think it could be some new standard from 2007, because Ekiga v4.0 seems ok and mentioned hardware devices don't have new firmware since this year. Can you confirm that please? I'm attaching some captures. Thank you