Grandstream Networks 386 - Manual (Page 16)

HandyTone-386 User Manual Grandstream Networks, Inc.
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HandyTone-486 fails to register Button flashes every 2 seconds (if SIP server is configured)
Firmware Upgrading Button flashes every 2 seconds
Device Malfunctions Red light steady on
GREEN LED mostly 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
In Conversation Green light steady on