I have a 2561 with T1CAS. Incomming calls hit a call handler and are given the option to transfer direct to
an extension. When the transfer occurs, The calling party only hears half of the rings. The called party hears them all.
For example outside caller calls in and hears unity handler. They transfer to extension 1234. 1234 converage is to voicemail after about 22 seconds (4 rings.)
The caller will hear two rings with extended silence between the rings and the called party hears all 4 if they dont answer and let it roll to voicemail.
The behavior is the same if you call a DID number through this circuit and router and have them transfer you to a 4 digit extension, which removes
unity from the mix. If you call the handler or extension from the inside (VOIP) and repeat the transfer you dont get this behavior. So its gotta be
something on the gateway. Dial-peer perhaps? Any ideas?