Set when the external telephone and the machine ring in Tel/Fax Ready mode.
The factory default administrator name and password are "admin" and "aaaaaa" respectively.
Pressing [Tel Priority Mode] switches between [ON] and [OFF].
[ON]: The sender is assumed to make a voice call. The telephone rings early.
[OFF]: The sender is assumed to send a fax. When the machine determines that the sender wants to make a voice call, the telephone rings.