I hope that I have not unnecessarily confused you here.
But knowledge of the basic functions of a telephone communications
system are crucial so that you may fully comprehend the complexity of how a VoIP system can interface with an actual
"wired" telephone system. Otherwise you are just spinning your wheels. You can design the most elaborate Voice
over Internet Packet system, get it to interface flawlessly using TCP/IP and yet not be able to call into or
receive calls from your local telephone system. Hence you have a very pretty and impressive mass of blinky and
flashing lights, that just takes up space. BUT THEY WILL DEFINATELY BE PRETTY, Unless you forget to hook up all
those ever impressive LEDs.
I would suggest that you first attempt to
utilize a Voice over LAN system. This would allow you to "benchmark" a system and software suite that you will
gain experience in setting up/configuring and managing. This will also help to enlighten you to the many "pit
falls" and "possible system shortcommings" that can be experienced with a data/voice network that is merged onto
a single network. The Telephone Companies (You know - those folks you pay every month for that telephone line that
you use to call other people on; or would it be more accurate to say the telephone line that those tele- marketers
use to un-relentlessly harras you into buying all of that useless stuff that you were convinced "you just had to
have".
Here are a couple of Links where you can
research this subject further:
ComputerTelephony.org
Digital White Papers and Research Reports
Network Computing Magazine - Choosing a VoIP PABX
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