# Polycom Line Keys / BLF

**Category:** Legacy Pages
**URL:** https://www.simtex.com.au/support/kb/legacy-pages/polycom-line-keys-blf
**Published:** 2014-08-04

Your handset has multiple line keys which can be used as actual lines or speed-dial buttons with indicators.

Your handset has multiple line keys which can be used as actual lines or speed-dial buttons with indicators. An internal speed-dial with an indicator is called a BLF in the PBX world.

Speed-dial keys can be internal or external numbers.

##### What is a BLF?

BLF or busy lamp fields show the status of other users phones (busy, ringing, available) connected to your phone system.  Extra keys you are not using can be assigned to be BLF keys. You can assign a workmate’s extension to appear as a BLF on your phone – when their phone is in use / ringing you will be able to see this on your handset. As the key is also a speed-dial, you may press the key to call your workmate.

[![VVX400 mainScreen](https://www.simtex.com.au/uploads/VVX_400_main_Screen_a97052878c.bmp)](/uploads/VVX_400_main_Screen_a97052878c.bmp)

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Example BLF – extension 221 through 228

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##### How do I change my line keys?

At this stage Simtex does not have a customer facing web page available.  Please e-mail Simtex support with your request, for example:

My Extension: 204

Line Key 1 – Line 1

Line Key 2 – Line 2

Line Key 3 – BLF 205

Line Key 4 – BLF 206

## Related

- Article: https://www.simtex.com.au/support/kb/legacy-pages/polycom-line-keys-blf
- Category: https://www.simtex.com.au/support/kb/legacy-pages
- Knowledge Base: https://www.simtex.com.au/support/kb
- Full AI reference: https://www.simtex.com.au/llms-full.txt