Communication Network Taken To The Next Level

By far the largest communication network on this planet is the global Public Switched

Telephone Network (PSTN). This network brings together about a billion telephone

sets in a highly connected fashion which allows almost every set to be reached by

every other set. The global telephone network is the center-piece of the field of

telecommunication.

Although the telephone system was originally designed to carry analog voice

signals, the advent of computers and data communication has lead to it being

increasingly used to also carry computer data traffic. At the same time telephone

networks have evolved to take advantage of the digital technology made available by

computers. Modern telecommunication networks are designed to carry information

in a variety of forms (e.g., voice, data, video, fax). Telecommunication and data

communication are fast converging.

The communication networks service providers that ensure the free flow of communication networks and how this is passed on on the the subsrcibers are guided by :

• N-CONNECT:  used for initiating a connection ( connections are always initiated by service users.)
• N-DATA:  used for normal data transfer.
•  N-EXPEDITED DATA:  used for higher priority data transfer.
• N-ACK-DATA: used for confirmation of data transfer.
• N-RESET: used by the service user or provider for resseting the network service.
• N-DISCONNECT: used by the service user or for disconnecting a connection.