Patent ID: 8787363

Claim:
A method for emulating Plain Old Telephony Service (POTS) using Voice over Internet Protocol (VoIP) signaling channels and bearer channels, comprising: emulating fault isolation mechanisms in POTS; emulating a Pull Break (P/B) test; and extending fault isolation mechanisms to topologies in a VoIP environment which comprises: receiving a signaling and media continuity testing command including a destination telephone number from a control channel of an optical line termination (OLT) responsive to a user phone losing communication service; transmitting the signaling and media continuity testing command to a specific optical network termination (ONT) device being tested to determine the ONT's session initiation protocol (SIP) communication capability; transmitting a message to a session initiation protocol (SIP) proxy to confirm the SIP proxy is reachable via the ONT; tracing a path to the SIP proxy via a tracing command sent to the SIP proxy to isolate the reachability of the SIP proxy; executing a test call via the ONT by dialing the destination telephone number through the SIP proxy; completing the call; and transmitting the results of the test call to a requesting entity.