Sometimes, I can see here the following scene:
Asterisk sends 11 SIP OPTIONS-packages (qualify0) and they are all ignored by the peers – but the 12. package is answered immediately as expected (I’m sure there is no network related problem).
I can see this on trunks via Internet and locally with extensions – no matter if it is via pjsip or traditional sip module.
What’s the difference between the 11 packages and the 12. package?
It’s the branch, tag and Call-ID. The 11 packages before all do have the same branch, tag and Call-ID. The
12. package changes them.
Looks like some of these values are ignored by the peers. But why? Are they broken?
Thanks, kind regards, Michael