Hi, all,
An inter-operation problem is encountered, the scenario is,
UA 1 B2BUA GW
| INVITE-1 | |
|-------------------->| INVITE-2 |
| |----------------------->|
| | 183-3 |
| |<----------------------|
| 183-4 | |
|<--------------------| 183-5 |
| |<----------------------|
INVITE-1 does not have SDP, and no Supported header.
INVITE-2 does not have SDP, but INVITE-2 has Supported header with 100rel.
183-3 has SDP, and Required header with 100rel. 183-3 is re-transmitted in
183-5. I omits further retransmission.
183-4 has SDP, but no Required header.
The call fails.
My question is: is legal for B2BUA to put Supported header with 100rel if UA1
indicates that it does not support 100rel? I think B2BUA is wrong in this case.
In the above picture, B2BUA is from a very big company :)
What is your point?
Thanks
kaiduan
__________________________________________________________________
Yahoo! Canada Toolbar: Search from anywhere on the web, and bookmark your
favourite sites. Download it now at
http://ca.toolbar.yahoo.com.
_______________________________________________
Sip-implementors mailing list
[email protected]
https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
