Comdial DSU and DSU II System Reference Manual page 93

GCA70–245
Program the enable/disable buttons (at any blank programmable
button location) as follows:
1. Press INTERCOM.
2. Dial 1.
3. Press programmable button.
4. Dial a feature code
94 = Headset Button,
95 = External Ringer Button,
96 = Tape Recorder Button,
97 = External Pager Button.
5. Press TRANSFER/CONFERENCE.
6. Repeatedly press programmable button and dial separate codes
repeatedly until all four buttons are programmed, if desired,
—OR—
press SPEAKER to end.
To use a feature button,
1. Press desired button to enable mode.
When you press the button, the feature is enabled and you can use the
corresponding auxiliary device. The display denotes the feature and
shows it to be enabled. For example, when you press the HEADSET
button, the display shows "Headset Enabled" and you can operate the
telephone with a headset.
To disable any active mode, press the corresponding feature
button to alternate off.
Using The Other Telephone Features
LCD Speakerphone Reference Manual 8–21