Fixed bug in SipRefreshMgr with To tags present int REGISTER requests. 3CX PBX sends To tag in 200 OK response to REGISTER, which confuses sipxtacklib. REGISTER cant contain a To tag. With this fix, sipxtapi can register with 3CX PBX.
Fixed bug in SipRefreshMgr with To tags present int REGISTER requests. 3CX PBX sends To tag in 200 OK response to REGISTER, which confuses sipxtacklib. REGISTER cant contain a To tag. With this fix, sipxtapi can register with 3CX PBX.

According to rfc3261:

"  Dialogs are created through the generation of non-failure responses
   to requests with specific methods.  Within this specification, only
   2xx and 101-199 responses with a To tag, where the request was
   INVITE, will establish a dialog."

"A REGISTER request does not establish a dialog."

"When a UA sends a request outside of a dialog, it contains a From tag only, providing "half" of the dialog ID."
melcon/sipxtapi,litalidev/sipxtapi,litalidev/sipxtapi,litalidev/sipxtapi,litalidev/sipxtapi,litalidev/sipxtapi,melcon/sipxtapi,melcon/sipxtapi,litalidev/sipxtapi,litalidev/sipxtapi,melcon/sipxtapi,melcon/sipxtapi,melcon/sipxtapi,melcon/sipxtapi,melcon/sipxtapi,litalidev/sipxtapi