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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

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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

ITU-T 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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