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ITU-T - V.26 TER

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

active, Most Current
Organization: ITU-T
Publication Date: 1 November 1988
Status: active
Page Count: 21
scope:

Introduction

This modem is intended for use on connections on the GSTN and on point-to-point 2-wire leased telephonetype circuits (see Note 1). Its principal characteristics are as follows:

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

b) half-duplex mode of operation (optional) on the GSTN and point-to-point leased circuits (Note 2),

c) channel separation by echo cancellation,

d) differential phase-shift modulation for each channel with synchronous line transmission at 1200 baud (nominal),

e) inclusion of a scrambler,

f) inclusion of a compromise or adaptive equalizer,

g) inclusion of test facilities,

h) operation with data terminal equipment (DTE) in the following modes:

2400 bit/s synchronous,

1200 bit/s synchronous (fall-back rate),

2400 bit/s start stop (optional),

1200 bit/s start stop (optional) (fall-back rate),

i) inclusion of an operating sequence intended to allow interworking with 2-wire duplex 4800 bit/s modem (which modem is for further study).

Note 1 - In certain countries the use of such a modem over the GSTN may not be allowed.

Note 2 - When the optional half-duplex mode of operation is used, provisions in § 7 shall supersede provisions given elsewhere in this Recommendation.

Document History

V.26 TER
November 1, 1988
2400 BITS PER SECOND DUPLEX MODEM USING THE ECHO CANCELLATION TECHNIQUE STANDARDIZED FOR USE ON THE GENERAL SWITCHED TELEPHONE NETWORK AND ON POINT-TO-POINT 2-WIRE LEASED TELEPHONE-TYPE CIRCUITS
Introduction This modem is intended for use on connections on the GSTN and on point-to-point 2-wire leased telephonetype circuits (see Note 1). Its principal characteristics are as follows: a)...

References

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