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, you can lift the handset or press Speaker Phone to answer.

If you are at an extension telephone, you'll need to lift the handset during the F/T Ring Time and then press # 5 1 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 5 1.