Do Not Disturb and Call Screening
Do not disturb stops your phone ringing and sends callers to voicemail, a busy tone or another number. Call screening asks callers to say their name first, so you can decide whether to take the call.
Last reviewed: October 2026
Turning on do not disturb
You can switch it on in three ways:
- Press the DND button on your phone, if it has one and was set up through the portal.
- Dial
*78to turn it on and*79to turn it off. - In the portal, open the number, choose Incoming Calls → Do not Disturb and tick Enable Do not Disturb Service.
Choose where calls go
| Setting | What it does |
|---|---|
| Play Busy Tone | Callers hear busy instead of going to voicemail |
| Do not Disturb Forwarding Number | Sends calls to another number while DND is on |
| Time Schedule | Turns DND on only at certain times |
| Apply DND before all other features | DND also blocks the auto attendant, queues and conferencing on this number |
| Also apply DND when part of a ring group or queue | Stops ring group and queue calls too. By default they still ring |
Showing DND on colleagues' phones
When DND is on, BLF keys watching your line turn red. This only works when the time schedule is At all times.
You can use this to show forwarding too. Set a DND forwarding number instead of normal call forwarding. Your DND key then turns forwarding on and off, and colleagues see the red light while it's on.
If you set up a phone by hand, set its DND on code to *78 and off code to *79 so the light follows the button.
Screening calls
- Open the number and choose Incoming Calls → Call Screening.
- Pick who to screen: anonymous callers, all callers, forwarded calls only, overseas callers, or overseas and anonymous callers.
- Choose a time schedule and save.
Screened callers are asked to say their name. Your phone plays it to you, and you choose to accept or reject the call. You can also dial *34 to switch between screening anonymous callers, all callers, and off.
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