The CS2K (aka CallServer 2000) is the next generation of Nortel voice switch. It runs VoIP natively; and converts (via the PVG or Packet/Voice Gateway) to TDM where required.
It can be a new switch from the ground up, or through a program called succession, existing DMS's can be converted to a CS2k setup; replacing the MS, and parts of the front end. Each CS2k is good for upto about 200k lines or line-eqiv's.
