AT&T 9312 - Manual (Page 6)

INSTALLATION
4
3 Attach the belt clip to the cordless handset (optional).
4 Set the dial mode.
The dial mode switch on the bottom of the base comes set to TONE.
If you have touch tone service, the phone will be ready to use when
installation is complete. If you have dial pulse (rotary) service, set the
switch to PULSE.
5 Select base ringer volume for each line.
Set the RINGER switches on the back of the base to HIGH, LOW, or OFF.
To attach To remove