To all the experts,
I recently run into a situation where I disconnect the call before the receiving end pickup. What I observed was that Asterisk responded with PUBLISH message to the receiving UA, but the UA either can not respond to the “PUBLISH” method or responding with 501 (not implemented). This cause the receiving UA keep on ringing untill I pick up the phone. Is this the normal behavior of Asterisk or a miss-configuration somewhere?
Here is the topology
UA1 —> OBP —> Asterisk —> UA2
I am using xpro and cisco7960
Thanks