The Grandstream GXP2000 appears to support the Asterisk Busy Line Field - which as I understand it shows when extensions are busy, which is handled by the Asterisk PBX.

Now I seem to remember seeing that Voipfone use a version/evolution of Asterisk, so is there any way the BLF can be used?

Cheers...
...Charliep

Did you get the BLF to work on the GXP 2000 phones. We are currently trying to get this to work and have been having emails with Grandstream support but it is a slow process.

Voipfone have said it is an issue for Grandstream.