True. This is a common call scenario, especially when passing few
network elements
-Original Message-
From: sip-implementors-boun...@lists.cs.columbia.edu
[mailto:sip-implementors-boun...@lists.cs.columbia.edu] On Behalf Of
Vivek Batra
Sent: Monday, October 11, 2010 10:13 AM
To: 'Ayyanar
Hi,
I have found it with several service providers which play announcement (and
hence send 183 Session Progress) to wait if actual called party is busy and
send 180 Ringing as soon as called party becomes available.
Best Regards,
Vivek Batra
-Original Message-
From: sip-implementors-boun
Yes, I would think if the call is going through different gateways before
reaching the callee. You are likely to get different types of announcements
being played.
-Original Message-
From: sip-implementors-boun...@lists.cs.columbia.edu
[mailto:sip-implementors-boun...@lists.cs.columbia
Hi,
Is there a call flow like this ?
--- INVITE (OFFER)--->
<-- 100 TRYING ---
<-- 183 PROGESS(ANSWER)---
<-- 180 RINGING(ANSWER)---
<-- 200 OK (ANSWER) --
--- ACK ->
If so, in which scenario can we find a call flow like the above mentioned
1. Can UAS responds with multiple 18x for the INVITE request received?
YES.
2. What should be the behavior of UA1 if it receives multiple 18x?
Create dialog if the response contains tag. Update your state machine.
3. What should be the behavior of UA1 while receiving the second 18x with
SDP?
When t
