Grandstream 486 Message Waiting Light Keep Flashing

I'm using a Grandstream 486 with "Program-- Bootloader-- HTML-- VOC--".

If someone leaves me a voicemail then I get the stuttered dial tone and the MWI light flashes.

I can dial 1571 and hear my message and then delete it by pressing 7. The message is deleted but the light will continue to flash indefinitely. The only way to clear the light (and stuttered dial tone) is to reset the ATA.

Does anyone have any suggestions?

How does this feature work? Does voipfone send a "start flashing" message to the ATA when the voice mail is left and then a "stop flashing" message when I delete the voice mail?


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