Voicemail indicator for shared mailbox

I recently setup a freepbx system, with a 4port fxo card (tdm410p), and 4 Cisco 504g IP phones connected via sip. Each phone has their own extension (#101, #102, #103, #104), and then they share a voicemail box, which is a virtual extension (#301).

I know if each had their own mailbox it would be easier for the phone to light up the voicemail light, but because the voicemail is not tied to their extension they don’t light.

Is there a way through freepbx or through the phones to make them all light up when there is a voicemail at box #301?

Change the voicemail field in the extension to the shared box.

You mean like outlined in our WiKi. http://wiki.freepbx.org/display/F2/Subscribe+a+BLF+button+to+Monitor+a+Voicemail