[cisco-voip] SIP disposition after 488 to T.38

[roy]

Hi List,

Here's a setup and packet capture flow:

SIP box				Cisco
[a at b.com]			[x at y.com]
INVITE	x at y.com	--------->	
		<---------	100 TRYING
		<---------	183 Session Progress
		<---------	200 OK
ACK	x at y.com	--------->
		<---------	re-INVITE a at b.com to t.38
488		--------->
		<---------	ACK
...
...

Given that only available codec of g.729 at Asterisk side, what messages
are to be expected after the T.38 re-invite has been made and was
rejected with 488?

Thanks,

Roy