Konica Minolta bizhub C25 Reference Manual page 446

Communication Setting
In the [Scan] - [Fax Configuration] - [Communication Setting] window allow
you to configure the following items:
Item
[Tone/Pulse]
Configuring the Printer
Description
Select a tone or pulse dialing mode. If this parameter is
not specified correctly, faxes cannot be sent.
Choices: [Tone], [Pulse 10PPS], [Pulse 20PPS]
Default: [Tone]
Configuration Menu Equivalent:
[UTILITY] - [ADMIN. MANAGEMENT] - [COMM.
SETTING] - [TONE/PULSE]
d
If [User Setting] - [Fax PTT Setting] is set to
[U.S.A], [Canada] or [New Zealand], no setting
other than [Pulse] can be selected.
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