In IP Telephony 101, I looked at the pros and cons of IP telephony, and a few of the considerations you should explore before making the switch to VoIP.
We’ll turn now to the nitty-gritty of VoIP systems: the architecture, the equipment, the network structure, the software, and what you can expect to pay.
But before we start, let’s get WAN and LAN out of the way. A LAN (local area
for telephony, audio conferencing, video conferencing, Web conferencing, contact center, or mobile solutions). Equipment Router : A router is a kind of cross between a control freak and a traffic cop: it tells data where to go, and how to get there. Sitting between subnets* or individual computers, the router also helps determine communication speed (so do communication lines—more on that in a bit). A router uses a “one-to-many” approach, which means that information from a single source is sent to