Brother MFC-3100C Owner's Manual page 28

Setting the Dialling Mode (Tone/Pulse) (Not available in New Zealand)
The machine is initially set to TONE. If you are using a PULSE dial line, you can change the setting
to PULSE by following the steps below.
1
Press Menu/Set, 1, 6. The screen prompts you to select PULSE or TONE.
2
Use or
3
Press Menu/Set when the screen displays the dialling mode you want.
4
Press Stop/Exit.
17
Chapter 1
to select the dialling mode.