
1) Telephone exchange
Found on
https://www.crosswordclues.com/clue/trixbox

trixbox (formerly Asterisk@Home) is a software PBX based on Asterisk. trixbox was initially released under the name Asterisk@Home. In October 2006 it was renamed to trixbox after Digium requested that its developers cease the use of the word `Asterisk`; the renaming was further justified by the fact that the product at that time consisted of muc.....
Found on
http://en.wikipedia.org/wiki/Trixbox
No exact match found.