[asterisk-users] SIP response code 603

[Alex Balashov]

DHAVAL INDRODIYA wrote:

> dear all,
> 
> what is the meaning of this
> 
> *Got SIP response 603 "Declined" back from XXX.XXX.XXX.XXX*
> 
> is it asterisk related issue , because sometimes my outgoing calls 
> working fine , and in a day for 2 to 3 hours it gives me this
> 
> my provider says its all fine there any one know meaning of this

It is a SIP failure reply that your provider is sending you 
periodically.  Either there is a legitimate reason that they are 
denying some of your calls, or there is a problem on their end that 
they are not aware of and/or themselves do not understand.

According to RFC 3261, the precise intended meaning of the 603 
Declined error message is:

---

21.6.2 603 Decline

    The callee's machine was successfully contacted but the user
    explicitly does not wish to or cannot participate.  The response MAY
    indicate a better time to call in the Retry-After header field.  This
    status response is returned only if the client knows that no other
    end point will answer the request.

---

In practice, 603s are often sent instead of 503 Service Unavailable 
because, strictly, 6xx-class final responses indicate that no further 
call attempts should be made by the sending user agent to that 
destination.  This is not true of 4xx and 5xx-class errors.

Also, why is your name rendered in all-capital letters?  Have you 
considered becoming "Dhaval Indrodiya" instead of "DHaVAL INDRODIYA?"

-- Alex

-- 
Alex Balashov - Principal
Evariste Systems
Web     : http://www.evaristesys.com/
Tel     : (+1) (678) 954-0670
Direct  : (+1) (678) 954-0671