NEC Aspire 22B disp phone - Red light wont turn off?

[jamaster14]

We have an NEC aspire phone system. One of users has a phone with the red indicator light on and it wont turn off. she does not have any messages and her phone is not forwarded. anyone know either how to clear this or the possible cause?

I know with the sl1100 you can do like speaker + 774 or something like that to clear the message indicator light, does the aspire have a similar feature?

 

[AZrichard]

To cancel a Camp-On request:
1. Hang up.
2. At keyset, press idle CALL key and dial 870.
OR
At keyset, press Camp-On key (PGM 15-07 or SC 851: 35).
OR
At single line set, lift handset and dial 870.