Computer Busses

G

ISDN

G.1 Introduction

A major problem in data communications and networks is the integration of real-time sampled data with non-real-time (normal) computer data. Sampled data tends to create a constant traffic flow whereas computer-type data has bursts of traffic. In addition, sampled data normally needs to be delivered at a given time but computer-type data needs a reliable path where delays are relatively unimportant.

The basic rate for real-time data is speech. It is normally sampled at a rate of 8 kHz and each sample is coded with eight bits. This leads to a transmission bit rate of 64 kbps. ISDN uses this transmission rate for its base transmission rate. Computer-type data can then be transmitted using this rate or can be split to transmit ...