Hello folks My apologies if this has been asked in the past but is this call flow correct?
B2BUA IMS B2BUA
| | |
------> | ------> | |
INVITE | INVITE | |
| | |
| | ------> | ------>
| | INVITE | INVITE
| | |
| | <------ | <------
| | 200OK | 200OK
<------ | <------ | |
200OK | 200OK | |
| | | (retransmit)
| | | 200OK (INV)
| | |
| | | (ACK timeout)
| | <------ | <------
| | BYE | BYE
<------ | <------ | |
BYE | BYE | |
| | |
------> | ------> | |
200OK | 200OK | |
| | ------> | ------>
| | 200OK | 200OK
| | |
| <------ | <------ | ???????
| 200OK(INV) | 200OK(INV) |
| | |
| | |
| | |
| | |
I think it's an error but I'm getting confused from the rfc ...
The UAS MUST still respond to any pending requests received for that
dialog. It is RECOMMENDED that a 487 (Request Terminated) response
be generated to those pending requests.
2nd question
If the B2BUA sends BYE
and then incorrectly repeats the 200 for INVITE should IMS forward it?
thanks
Manolis
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