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ITU-T V.22 BIS

2400 BITS PER SECOND DUPLEX MODEM USING THE FREQUENCY DIVISION TECHNIQUE STANDARDIZED FOR USE ON THE GENERAL SWITCHED TELEPHONE NETWORK AND ON POINT-TO-POINT 2-WIRE LEASED TELEPHONE-TYPE CIRCUITS

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Organization: ITU-T
Publication Date: 1 November 1988
Status: active
Page Count: 18
scope:

Introduction

These modems are intended for use on connections on the GSTN and on point-to-point 2-wire leased telephonetype circuits (see Note). The principal characteristics of these modems are as follows:

a) duplex mode of operation on the GSTN and point-to-point leased circuits,

b) channel separation by frequency division,

c) quadrature amplitude modulation for each channel with synchronous line transmission at 600 baud (nominal),

d) inclusion of a scrambler,

e) inclusion of an adaptive equalizer and a compromise equalizer,

f) inclusion of test facilities,

g) data signalling rates of:

2400 bit/s synchronous,

2400 bit/s start-stop,

1200 bit/s synchronous,

1200 bit/s start-stop,

h) it is compatible with a V.22 modem operating in Modes i) or ii) at the 1200 bit/s signalling rate and includes automatic bit rate recognition.

Note - In certain countries the use of such modems over the GSTN may not be allowed.

Document History

ITU-T V.22 BIS
November 1, 1988
2400 BITS PER SECOND DUPLEX MODEM USING THE FREQUENCY DIVISION TECHNIQUE STANDARDIZED FOR USE ON THE GENERAL SWITCHED TELEPHONE NETWORK AND ON POINT-TO-POINT 2-WIRE LEASED TELEPHONE-TYPE CIRCUITS
Introduction These modems are intended for use on connections on the GSTN and on point-to-point 2-wire leased telephonetype circuits (see Note). The principal characteristics of these modems are as...

References

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