How to develop a client-server application for VOIP?

[thekoolestone]

Hello everyone,

I am a 4th year student of electronics & tele-communication engineering. I want to develop a customised client-server application for voip usage for our college LAN. We have PAP2T Linksys ATA's and want to develop an web application wherein students can initiate and access voice calls among themselves.

Someone advised us to use asp.net for the server side programming and asp.net ajax for client side. Since I am relatively a novice in programming, having only done coding in C++, .NET framework is entirely a new ballgame.

Can someone please advise on how to initiate this task and possibly advise us on how to go about developing this application.

Any inputs/aids/tips will be deeply appreciated.

[soviski]

Hey guys, I need a PBX style phone system in my business but I don’t have the funds for a traditional system. I have a wired/wireless Ethernet system already installed throughout my business and was wondering if there was a way to use IP phones through the network internally without an outside VOIP service provider? Can I use IP phones on my internal network without VOIP service? Thanks a lot.
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[mmetzger]

Look at asterisk (http://www.asterisk.org) or Freeswitch (www.freeswitch.org) if you can actually set up a physical server to run this (and you've determined how you want to handle failures / etc.)

Otherwise, save yourself some trouble and just use Skype / Gizmo / Any of the IM's w/ Voice, etc.