[asterisk-users] Asterisk SIP handling - why 491 Request Pending response

[Johansson Olle E]

22 dec 2007 kl. 15.51 skrev Tomasz Zieleniewski:

> Hi,
>
> The message that asterisk receives is not a retransmission but this  
> is the same message but it enters asterisk from other sip proxy   
> which is not a loop.
> The flow is the following
>
> Asterisk      SIP Proxy (Location Service)
> INVITE (to registrar)
> --------------------->
> INVITE (to voicemail when not registered)
> <--------------------
>
> when message enters asterisk for the second time it ofcorse has some  
> extra SIP
> specific header like Record-Route and Via and the Request-URI is  
> changed.
> And this causes 491 response.
> Can I do something about this?
> Can this behaviour be controlled, what do I have to change in the  
> message so that asterisk won't treat it with 491 response?

Without seeing the full SIP dialog, there's not much I can do or say.
I would say that it would be better if the proxy could reply with an  
error
message and that you used Asterisk to forward to voicemail when it
gets that error message.

/Olle