Telephone Disconnects During A Call - Canon TR4670S Online Manual

Telephone Disconnects During a Call

Is telephone line cable or telephone (or a peripheral device such as an external
Check
telephone, an answering device, or a computer modem) connected correctly?
Check that the telephone line cable and the telephone (or a peripheral device such as an external telephone, an
answering device, or a computer modem) are connected correctly.
Connecting Telephone Line
484