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<acronym>

ISDN is a technology that allows far faster transfer of information (voice, data, fax etc.) than a traditional telephone system and yet utilises the original telephone cabling system. In addition to this, the use of ISDN enables a single cable to be split into up to two channels that can be used simultaneously to carry different types of information. Alternatively, the two channels can be used to transmit one signal, thus doubling the transmission speed. To put this in perspective, the bandwidth of an ordinary analogue PSTN telephone line is 64kbps (bits per second) and the fastest data transmission possible is currently 56 kbps. Attaining this level of transfer is dependent on several factors, for example, the compatibility of sending and receiving modems, connection quality and absence of interference. In reality transfer rate is never faster than 53 kbps and often considerably less. Using a basic rate ISDN line (ISDN2) speeds of up to 128 kbps are possible and using various types of compression this may be doubled. A further advantage is that connection by ISDN is all but instant. Analogue connection can take twenty seconds or more.

(14 Jan 2009)

ischuria, ischury, iscoms, ISDE, ISDN < Prev | Next > ISE, -ise, ISEE, I see no X here

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