Set the machine so that it can determine whether the sender is sending a fax while the recipient is holding the handset of the external telephone after picking it up to answer the call when the telephone rings in Tel/Fax Ready mode.
[CNG Detection] is set to [ON].
Pressing [CNG Detection] switches between [ON] and [OFF].
[ON]: The machine detects fax beep signals, and then automatically starts receiving a fax.
[OFF]: If the sender is sending a fax, the machine receives a fax with manual reception.