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Grandstream Networks Grandstream HandyTone HandyTone-488 User Manual page 14

Analog telephone adaptor for sw release version 1.0.0.4
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HandyTone-488 User Manual
GREEN LED
always indicates normal working status
Message Waiting Indication
RINGING
RINGING INTERVAL
Button flashes every 2 seconds
Button flashes at 1/10 second
Button flashes every second
14
Grandstream Networks, Inc.

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