Sharp UX-51 Operation Manual page 32

Setting ICM time
Incoming messages (ICMs) are the messages which callers leave for you on
the built-in answering machine. The answering machine is set at the factory
to allow each caller a maximum of 4 minutes to leave a message. If desired,
you can change this setting to 15, 30, or 60 seconds.
1
Press these keys:
The display will show:
2
Press these keys:
The display will show:
3
Press a numeric key to select the desired
ICM recording time:
1: 15 seconds
1
2: 30 seconds
2
3: 60 seconds
3
4
Press the STOP key.
Optional Answering Machine Settings
FUNCTION
0
A.M. SETTINGS
ICM RECORD TIME
STOP
31