Hello,

look at:

http://kamailio.org/docs/modules/stable/modules/tm.html#tm.p.cancel_b_method

Maybe one or another value for that parameter is suiting better your use
case.

Cheers,
Daniel

On 07/10/15 23:27, John Billings wrote:
> Hi Everyone,
>
> We are using Kamailio 4.2.0 with TLS. It’s setup so multiple phones can 
> register to the same account and they all ring together.
>
> It always works great unless one of the phones is on a slower Internet 
> connection. Occasionally that phone will start ringing after another phone 
> has already picked up the call. The problem is that the INVITE to the slow 
> phone is not followed by a CANCEL. So the phone keeps on ringing for a long 
> time.
>
> When there is no problem, the logs on the phone show:
> Receive: INVITE
> Send: 180 Ringing
> Received: CANCEL
> Send: 200 Ok
>
> When the phone keeps ringing:
> Delay: up to several seconds
> Receive: INVITE
> Send: 180 Ringing
>
> The problem never seems to happen if I wait until all of the phones have 
> received the INVITE. So is the late 180 response not getting handled by the 
> right session?
>
> Any ideas on how to track this down?
>
>
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-- 
Daniel-Constantin Mierla
http://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda
Book: SIP Routing With Kamailio - http://www.asipto.com


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