12 Oct
2008
12 Oct
'08
2:15 p.m.
On Sun, Oct 12, 2008 at 8:49 AM, Martin Hoffmann <hn(a)nvnc.de> wrote:
I agree with Martin, a 4xx class code should be used instead.
IMO it sounds like an ISUP Cause value "2 no route to destination"
which should be mapped to SIP "404 Not found" (RFC 3398).
Please, correct me if I'm wrong,
--
Victor Pascual Ávila
That said, our
SER server knows the given condition sent from
a paired PSTN switch is permanent, eg the SIP caller can't
call this number via our network now, tomorrow or next week
because of who you they or whom their provider is (or what
they failed to buy), so in this situation returning 503 all
the way out of our network is correct behavior (as stated in
the RFC), and doing so allows the upstream entity to click
over to the next preferred carrier that might reach that
destination.
I think it isn't. Neither 500 nor 503 is a status code for a permanent
situation. The gateway should return a 4xx class code instead because
actually this is a client error -- the client is not allowed to call
this specific number. Sounds like a 403 to me.