When the machine is in Fax/Tel mode, it will use the F/T Ring (fast double-ring) to alert you to pick up a voice call.

If you are at the machine, lift the external telephone’s handset, and then press the button in the following table to answer:

If you are at an extension telephone, lift the handset during the F/T Ring, and then press #51 between the fast double-rings. If no one is on the line, or if someone wants to send you a fax, send the call back to the machine by pressing *51.