- Grandstream Networks, Inc. Analog Telephone Adaptor User Manual HandyTone-488
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HandyTone-488 User Manual
Grandstream Net
works, Inc.
14
GREEN LED
always indicates normal working status
Message Waiting Indication
Button flashes every 2 seconds
RINGING
Button flashes at 1/10 second
RINGING INTERVAL
Button flashes every second
1
...
...
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