Can I program a button on a snom 300 to monitor the voicemail status of a virtual extension and then light up if there is voicemail on it?

I have a virtual extension at a clients which rings 3 phones simultaneously. If no one answers the call, the voicemail for virtual extension 300 accepts the call. But the 3 phones than have no idea that there is voicemail waiting. I don;t want to email the messages or text them, i just want the users to see a light so they can dial and listen as normal.

Many thanks.