I've seen similar postings before, but could not find the resolution.
SER 0.8.11
Windows Messenger 5.0.0381
Connecting two clients to the SER machine... both show online in their
messenger windows.
Testcase
SER: 'ngrep -n 5060 user1'
USER2: attempts IM 'hello world' to USER1
Flow control as seen with ngrep
User2 SER User1
1> invite
100 <2
3> invite
bye <4
bye <5
6> 481
7> 481
200 <8
200 <9
10> ack
11> ack
12> message
13> message
481 <14
481 <15
Has anyone seen this before?
- Dave