# BLF and speed dial keys

> Set up keys on a Yealink phone that show whether colleagues are busy, or call a number with one press.

- URL: https://kb.voipcloud.online/au/phones-and-apps/yealink/dss-keys-blf-speed-dial/
- Section: Phones and apps › Yealink
- Type: guide
- Applies to: All countries
- Last reviewed: 2026-11-09

Yealink phones have keys beside the screen (DSS or line keys) that you can program:

- A **BLF** (busy lamp field) key watches a colleague. Its light is green when they're free and red when they're on a call. Press it to call them, or to transfer a call to them.
- A **speed dial** key calls a saved number, such as a supplier or another office.

This guide sets keys in the phone's web interface. For auto-provisioned phones you can set them from the PBX instead; see [BLF and speed dial keys](https://kb.voipcloud.online/au/phones-and-apps/yealink/auto-provisioning-advanced/#blf-and-speed-dial-keys) in the advanced settings. Screens differ a little between models and firmware.

## Before you start

- The phone is set up and online in **PBX** › **Devices**.
- For a BLF key, the colleague's internal number. It's in their [User](https://kb.voipcloud.online/au/pbx/accept-make-divert/user/) settings.
- The phone's IP address (press **OK** on the phone) and web interface password. The default username and password are both `admin`. On an auto-provisioned phone, set the passwords in the SIP device's **Yealink settings** instead of on the phone.

## Steps

1. Type the phone's IP address into a web browser and sign in.
2. Go to **Dsskey** › **Line Key**. On an auto-provisioned phone, **Line Key1** is already set to your line; leave it as it is.
3. Choose a free key and fill in its row:

| Field | BLF key | Speed dial key |
| --- | --- | --- |
| **Type** | **BLF** | **SpeedDial** |
| **Value** | The colleague's internal number | The phone number to call |
| **Label** | Their name, shown next to the key | A name for the number |
| **Line** | **Line1** | **Line1** |
| **Extension** | Optional: a pickup code (see below) | Leave empty |

4. Click **Confirm**. The key appears on the phone straight away.

![Line Key page with a BLF key on Line Key2 and a speed dial key on Line Key3](https://kb.voipcloud.online/au/images/phones-and-apps/yealink/dss-keys-blf-speed-dial-line-keys.webp)

For a speed dial to a landline in another state, include the area code, for example 02 or 07.

### Answer a colleague's ringing phone

Enter `**` in **Extension** on a BLF key. When the colleague's phone rings, press the key to answer their call on your phone. Dialling `**` followed by their internal number does the same.

To let a group of people answer each other's calls, you can also use [Pickup groups](https://kb.voipcloud.online/au/pbx/settings/pickup-groups/).

## Check it works

- The BLF key's light turns red while the colleague is on a call, and green again when they hang up.
- Pressing the speed dial key calls the saved number.

If a BLF key stays unlit, check the internal number and that both phones are online.

## More key ideas

- A BLF key for a [Call flow control](https://kb.voipcloud.online/au/pbx/conditions/call-flow-control/) object's **BLF code** shows whether your day/night switch is on, and switches it with one press.
- A BLF key for a [Voicemail](https://kb.voipcloud.online/au/pbx/accept-make-divert/voicemail/) box's internal number shows when there are new messages.
- Paging keys: see [Paging](https://kb.voipcloud.online/au/phones-and-apps/yealink/paging/).

## Related

- [Transfer calls on a Yealink phone](https://kb.voipcloud.online/au/phones-and-apps/yealink/transfer-calls-on-yealink/)