[Asterisk-Dev] Handling SIP response 480

[Mikael Magnusson]

Papadopoulos Georgios wrote / skrev:
> Hello,
> 
> I have been using Asterisk for quite some time, but this is the first
> time I am digging into the code. (version is 1.2.1)
>  
> I have a SIP client that when in DND (Do Not Disturb) mode sends back a
> 480 Temporarily Unavailable response. Asterisk then forwards to the
> calling party a 500 Server Internal Error. Looking into the code I found
> that function hangup_sip2cause in chan_sip.c translates 480 to
> AST_CAUSE_FAILURE. Shouldn't it be AST_CAUSE_NO_ANSWER?
> 

Or ISDN cause code 18 "No user responding" (AST_CAUSE_NO_USER_RESPONSE) 
which is used in RFC 3398 "Integrated Services Digital Network (ISDN) 
User Part (ISUP) to Session Initiation Protocol (SIP) Mapping" section 
8.2.6.1 "SIP Status Code to ISDN Cause Code Mapping".

/Mikael