I need to create a network for a call center [closed]

I have:

• a patch panel with 24 ports.
• Windows server
• voip connection (voice over ip)

How do I make the connection from the patch panel to the router?

Do I need a router? If yes does it need to have certain features?

What exactly do I have to install on the windows server to make voip work?

What do I need to install on the clients to make everything work (something open source)?

Any other advice would be most appreciated. I am a newbie with this, please help.

edit:

They didn't give me any specifications of what software or hardware to use, I have to figure it out by myself, this is why I'm asking for help.

I am presuming my provider handles sip. Internal users are going to use soft phones. My telephone system will just need to be calling in/out.

It's really stupid that my question got closed. I just needed advice on how and what should I do from people with experience not from frustrated people who have nothing to do with the subject.

• let others do it.
• if you want to get a reasonable answer i suggest you add [much] more details - eg:
  • what voip protocol does your service provider handle [probably sip, but it's worth checking]
  • are your internal users going to use soft or hard-phones
  • what features should the telephone system offer - just calling in/out? call groups? auditing/recording? ivr?

open source voip for windows sounds experimental - you might consider using linux and asterisk or freeswitch under it. there are few commercial voip platforms for windows - 3cx is one of them.