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New Member

Message Waiting Lamp ?

A message waiting lamp or voice mail has never been configured.

1) The MWL is "on" the IP Phone, what does this mean ?

2) I assume a voice message can't be left if the MWI has not been configured ?

any help appreciated

thanks for reading

Matt C

Cisco Employee

Re: Message Waiting Lamp ?

1) MWI does not come on unless a DN has been configured

2) VM can be left even though MWI has not been configured.

I don't know what software you are using so I am referring to CallManager for question 1 and Unity for question 2.

New Member

Re: Message Waiting Lamp ?

I've got the same problem -- was this ever resolved?

Mike A

Cisco Employee

Re: Message Waiting Lamp ?


If you have a Unity-->Callmanager integration problem, please refer to this link:

and look for the relevant version.

Cisco CallManager 3.x Integration Guide for Cisco Unity x.x

Do you have MWI that used to work but does not work anymore? or

Do you have MWI that was never config'd?

MWI does not come on the CCM phones unless you have at very least config'd the MWI-On and MWI-Off code on CCM.

H. M.

New Member

Re: Message Waiting Lamp ?

I'm pretty certain the MWI light came on because the user dialled the MWI-On code by accident -- his DN and the MWI-On DN differed by interchanging 2 digits. I had him dial MWI-Off and the light cleared, of course. This suggests I might want to put those codes in an unreachable Calling Search Space, but I don't know yet if that's doable -- it's research time.

New Member

Re: Message Waiting Lamp ?

What about making a different partition for the MWI and making it a lower priority on CSS.

Just a thought.

New Member

Re: Message Waiting Lamp ?

I'd rather make it inaccessible from a telephone altogether, but I'm not sure how it's turned on/off yet. It would make sense that Unity impersonates the line appearance somehow; does it use the line's CSS, or is there a separate CSS defined for Unity's use? I just haven't had time to look into this yet.