Voip over linux

Asterisk Asterisk Support
1

I want learn how to configure voip over linux and i need some information as manuals (format pdf) or something like that

2

http://www.asteriskdocs.org/modules/tinycontent/index.php?id=11

3

Also refer to the links in my signature as well as this posted at the top of this forum:

forums.digium.com/viewtopic.php?t=4208

4

We are conducting classes on Voip Training which covers SIP overview and PBX basics and lots of related topics on 21st and 22nd of January.For more details visit here www.pbxnsip.com/training