On Fri, Mar 28, 2008 at 7:10 PM, Pedro Sanchez <psanchez at nortel.com> wrote: > > >From transaction retransmission point of view, any response >= 200 > > will terminate the transaction. But normally the other end should > > reply with 200 for NOTIFY. > > > Hmm, I guess it shouldn't. NOTIFY messages, being non-INVITE messages, > shouldn't be processed with 200 messages. So, wouldn't it be better to say > that any response >200 (not >= ) would do? > > "Non-INVITE transactions do not make use of ACK." > (RFC 3261, section 17.1.2.1) > > Or am I miss-reading this? > Yes I think you've misinterpret it. A 200 response is different than ACK, so while a non-INVITE requests are not ACK-ed, it's perfectly okay to send 200 response to non-INVITE requests. Re: PJSIP not sending 2xx response to REFER, are you sure about this? I'm pretty sure that it must have sent it, otherwise NOTIFY won't get sent. If you have a SIP trace for the conversation that will help. Cheers Benny
