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ITU-T V.22

1988 Edition, November 1, 1988

Complete Document

1200 BITS PER SECOND DUPLEX MODEM STANDARDIZED FOR USE IN THE GENERAL SWITCHED TELEPHONE NETWORKAND ON POINT-TO-POINT 2-WIRELEASED TELEPHONE-TYPE CIRCUITS



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Description / Abstract:

Introduction

This modem is intended for use on connections on General Switched Telephone Networks (GSTNs), and on point-to-point circuits when suitably conditioned.

The principal characteristics of this modem are as follows:

a) duplex operation on 2-wire GSTN and point-to-point leased circuits,

b) channel separation by frequency division,

c) differential phase shift modulation for each channel with synchronous line transmission at 600 bauds (nominal),

d) inclusion of a scrambler,

e) inclusion of test facilities.