[Asterisk-Users] Extension Lights Patch

[Anton Krall]

Guys I just read on the wiki:

"2005-07-19 - long awaited extension lights (hint priority) and call pickup
on various phones work with newly released asterisk patch digium bugtracker
- feel free to test and report findings to the bugtracker to have this
commited to cvs."

How does this work? And will it work only on certain phones or can it work
with the gxp2000?