Sharp FO-1650 Operation Manual page 118

MESSAGES AND SIGNALS
Audible signals
Continuous tone
Intermittent tone
(3 beeps)
Rapid intermittent tone
Rapid intermittent tone
11-4
3 seconds
5 seconds
(1 second on,
1 second off)
0.5 seconds on,
0.5 seconds off
35 seconds
(0.7 seconds on,
0.3 seconds off)
TROUBLESHOOTING
Indicates the end of
transmission, reception, or
copying.
Indicates incomplete
transmission, reception, or
copying.
Indicates that the printer cover is
open.
Indicates that the handset is off
hook.