Posted by H Rubijanto on September 08, 2002 at 20:03:35:

In Reply to: IP Telephony posted by Matthew S on September 02, 2002 at 08:36:19:

WAN (Wide Area Network).
A computer network that spans a relatively large geographical area. Typically, a WAN consists of two or more local-area networks (LANs).
Computers connected to a wide-area network are often connected through public networks, such as the telephone system. They can also be connected through leased lines or satellites. The largest WAN in existence is the Internet. (refdesk.com)
The main consideration to produce product service at a high level of quality is cost. All any kind of cost especially a telecommunication network cost which includes a voice network, data network using WAN (wide area network)- LAN (local area network), cellular mobile telephone network plus switching center, cable or radio connections to the subscribers, sophisticated software and server units represents a very large capital invesment. It is therefore a mandatory that the network, switching center and software is engineered as economically as possible with a satisfact grade of service for its users.
The grade of service may considered satisfactory if the network traffic congestion tolerable to its users, it means the connections of voice conventional network or voice over internet protocol on any multimedia services run well. An obvious way to ensure a satisfactory grade of service to the users is to engineer the telecommunications network in such a way that is a very small possibility for traffic congestion to occur even currently the imposed software in server units and specification capabilities and features of terminal computer respectively become a prominent role as the rule of the game.
Kind Regards.

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