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                                      ISDN (Integrated Services Digital Network)

 

 
 

ISDN (Integrated Services Digital Network)
ISDN stands for Integrated Services Digital Network. It is a set of
standards used to digital transmission of voice and data over already
existing telephone line. The ISDN uses the multiplexing technique to
carry three or more data signals at once through the telephone line.
The data transfer speed of ISDN line is very fast than old dial-up connection.
ISDN connections are more useful in applications like video
conferencing, to run online movies and upload and download
heavy files. In ISDN line, both ends of connections require the
ISDN modem and a special telephone set for voice communication.
Basically ISDN divides its total bandwidth into three channels.
The basic two channels send data at the speed of 64 Kbps
and third one at the speed of 16 Kbps. The 64 kbps channels
carry data, voice, image and movies and 16 Kbps channels
carry single information and link management data.
A computer connected to ISDN service can use both
channels. ISDN is twice as fast than a dial-up connection
but not much expensive. Its data transmission speed
is up to 128 Kbps.
DSL is much easier to install and provides much faster
data transfer rate. ADSL connections are more useful in
applications like videoconferencing, to run online movies
and upload and download heavy files. This connection is
ideal for today business requirements.
 

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