[SR-Users] Fwd: Call breaks after 32 seconds (Martin Mou?ka)

[Eduardo Lejarreta]

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 at lists.sip-router.org
[mailto:sr-users-bounces at lists.sip-router.org] En nombre de
sr-users-request at lists.sip-router.org
Enviado el: viernes, 21 de junio de 2013 0:18
Para: sr-users at lists.sip-router.org
Asunto: sr-users Digest, Vol 97, Issue 79

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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 at gmail.com>
To: sr-users at lists.sip-router.org
Subject: [SR-Users] Fwd: Call breaks after 32 seconds
Message-ID:
	<CAJY3ant7LG1xgO4ZjmSa0j-HfBbZtPUSvZ3kDkWiq7KD6XuhEw at 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
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