Monitor voicemail status on an IP phone
Last updated: 2026-06-18
The Message Waiting Indicator (MWI) lights up a lamp — or a screen icon — on a desk phone whenever the linked mailbox has unread messages.
Own mailbox
Provisioned phones light up automatically when the extension's voicemail has new messages. No extra configuration needed.
Watching another mailbox (BLF)
- 1
Open the auto-provisioning template
Go to Auto Provisioning → Templates → <model>.
- 2
Add a BLF key
Set the function to BLF, value to
vmexten:<extension number>(or the group voicemail number). - 3
Push to the phone
Save, select the phone, and click Update Config. The lamp lights when the watched mailbox has new voicemail.