[Asterisk-Users] Paging & Intercom

[John Fraizer]

Cisco 7940/7960 will do what you want.  They're not cheap but, then again, 
they're not much more than "comparable" phones for my Nortel system cost.

You then set up a "main" extension (regular calls will be sent here), an 
"intercom" extension for intercom and a "paging/voicecall" extension 
(autoanswer) on each phone.

Line 1 = 100
Line 2 = 4100 (Intercom 100)
Line 3 = 7100 (Page/Voicecall 100)

On a 7940, this leaves one spare line and on a 7960, it leaves 3.

For "allcall" paging, use a "normal" paging system and  have an extension 
(7000?) that causes the call to go out the soundcard of the * server to the PA.

John