[asterisk-dev] 900 second call drop - 420 Bad Extension error w/ SIP, IOS GW

[Jared Mauch]

On Mon, Dec 21, 2009 at 04:41:49PM +0100, Olle E. Johansson wrote:
> 
> 21 dec 2009 kl. 16.36 skrev Jared Mauch:
> 
> > 
> > Greetings,
> > 
> > I've been trying to track down an odd issue I've seen in versions
> > after 1.6.1.4 (including 1.6.2).
> > 
> > We have an IOS gateway that connects us to the PSTN for performing SIP
> > inbound/outbound termination.
> > 
> > What we see is when a call originates on the PSTN (so comes in the PRI
> > and is handed to Asterisk) after 900 seconds the call is dropped.
> > 
> > I'm not sure what is triggering this exactly. I've looked at SIP traces and
> > getting the exact nuance sorted out is tough, but what I see is something
> > similar to this:
> > 
> >    -- Got SIP response 420 "Bad Extension" back from x.x.2.115
> >  == Spawn extension (verio-int, 600, 4) exited non-zero on 'SIP/dns.name.hidden-00000064'
> > 
> > 
> > The actual message received is usually something like this:
> > 
> > SIP/2.0 420 Bad Extension
> > Via: SIP/2.0/UDP x.x.27.16:5060;branch=z9hG4bK21db1330;rport
> > From: <sip:2149151350 at x.x.27.16>;tag=as22d8cfaf
> > To: <sip:2149151356 at x.x.2.115>;tag=6E691D88-4A
> > Call-ID: C8B6CF60-D86311DE-93A08FDB-20B8ACA9 at x.x.2.115
> > CSeq: 102 INVITE
> > Unsupported: timer
> > Content-Length: 0
> 
> This is not really a question about asterisk source code development yet, while it may become. Please use the asterisk-users list for issues you have with running asterisk.

	Actually, it's about the changes that happened post 1.6.1.4+ in 
chan_sip.c and where to help track things down so I can file a proper report.

	The changes were quite substantial IMHO.

> The device is telling you that it doesn't support session timers. Check your setting for session timers in sip.conf. If you've turned it off and it still happens, please file a bug report. 

	Yes, *yawn*, that's the uninteresting part/response I get back, which
is odd.

	Now, if you wanted to know what it's set for, my session timers
are accept, but there are no limits currently set on call length.

	- Jared
	(who has not submitted a patch in a long time...)

-- 
Jared Mauch  | pgp key available via finger from jared at puck.nether.net
clue++;      | http://puck.nether.net/~jared/  My statements are only mine.