I have red most of the threads and some cisco docs to clear this out. but didn't help.
Phone 1 - PSTN - CMEFXO - Operator. when phone 1 calls office and cut the call before operator answer, the operator phone is continuously ringing.
I tried Battery reversal, answer and disconnect supervision. no luck.
Can anybody tell me what the exact problem is ? Is it a answer supervision or disconnect supervision?
Is there any thing to do with service provider ? ask them to enable some thing ?
If phone is connected to those CO line, it stop ringing when the caller cut the line. ie, signaling is happening between switch and phone.