30 Nov
2009
30 Nov
'09
7:05 p.m.
30 nov 2009 kl. 15.56 skrev Anders:
Hi,
This question may belong in a general SIP forum - but I'll drop it
here anyway, - hope I stir no big anger ;-)
I'm running Kamailio 1.5, - use it for wholesale, and my customers
typically send me calls from their Asterisk platform. I'm experiencing
a very share of calls ending up in 487. This should be the client
terminating the call - but is it my client (the provider with the
Asterisk platform) or is it the final client - my client's client?
Could Asterisk send a 487 for some reason?
I've researched this (maybe not good enough!), but cannot find the
answer: Does a 487 always mean that the client gave up and hung up? If
this is the case, could high PDD be my problem - it's taking too long
and the client gives up?
487 is sent as response to an INVITE after caller sending a CANCEL.
This is sent by Asterisk and all other UA's.
This only happens before the call is in UP state, so normally in ringing state or early
media.
Why - it could be a timeout when no one answers in a system somewhere or the caller simply
giving up since no one answers the call.
/O