Sharp FO-130 Operation Manual page 70

Continuous tone
Intermittent tone
3 seconds
Indicates the end of transmission, reception,
1 or copying.
5 seconds
(1 second on,
1 second off)
Indicates incomplete transmission, recep-
tion, or copying.
35 seconds
(0.7 seconds on,
0.3 seconds off)
Indicates that the handset is off hook.
TROUBLESHOOTING