[asterisk-users] Customizing sip response codes for PBX Sip trunk

[Eric Wieling]

> -----Original Message-----
> From: asterisk-users-bounces at lists.digium.com [mailto:asterisk-users-
> bounces at lists.digium.com] On Behalf Of Paul Belanger
> Sent: Thursday, August 04, 2011 10:47 AM
> To: asterisk-users at lists.digium.com
> Subject: Re: [asterisk-users] Customizing sip response codes for PBX Sip
> trunk
> 
> On 11-08-04 04:21 AM, Shaun Wingrin wrote:
> > Say the PBX is:
> > Mitel-3300-ICP 10.2.0.26_2
> > Created SIP trunk to * but PBX doesn't see trunk as unavailable when
> > its really unavailable. It simply fails the calls..
> > How can I change the SIP response code to respond with e.g. "All Channels
> busy"?
> > Any suggestions on how to program the Mitel to work?
>  >
> I have not done a deployment in the last year, but before that I've done
> multiple installation with the 3300 and ever ran into this issue.
> 
> Is this on the same LAN, I assume there is no routing issue?
> 
> A SIP debug log from Asterisk would be helpful.
> 
> But to answer your question, there is no way to change SIP response codes
> via the dialplan, you would have to modify the source for chan_sip.c
> (something I do not recommend).

Depending on how you define "response".  Hangup(17) will reject the call with the SIP version of User Busy.