Using Linux's Telephony Power

[teamzx]

I am in charge of setting up a reasonable network for a new
business and that also includes a phone system in addition
to Internet access. To cut costs I was thinking of using
Linux and a telephony card to create a Linux-based PBX
phone system using a few channels from a T1 line for voice
and the rest of course for Internet access. My question is,
using a simple Slackware distribution on a Linux gateway,
what is required to set up a successful telephony system
(hardware/software wise)?

 

[thedaver]

confusing as hell for me, but

http://www.asteriskpbx.com/

You gotta buy some PCI phone jack cards too

 

[teamzx]

This may be a bit off forum, but would I also be required to
get a commercial grade router to take care of the Internet
part of the T1 or can Linux do that too?

PS. Thanks thedaver, I will read over that site tonight when
I get some more time.