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ITU-T R.44
ITU-T R.44 6-Unit synchronous time-division 2-3-channel multiplex telegraph system for use over FMVFT channels spaced at 120 Hz for connection to standardized teleprinter networks
$10.75 $25.00 -57%In StockITU-T U.20
ITU-T U.20 Telex and gentex signalling on radio channels (synchronous 7-unit systems affording error correction by automatic repetition)
$10.75 $25.00 -57%In StockITU-T U.25
ITU-T U.25 Requirements for telex and gentex operation to be met by code- and speed-dependent TDM systems conforming to Recommendation R.101
$10.75 $25.00 -57%In StockITU-T Q.4
ITU-T Q.4 Automatic switching functions for use in national networks
$10.75 $25.00 -57%In StockITU-T G.751
ITU-T G.751 Digital multiplex equipments operating at the third order bit rate of 34 368 kbit/s and the fourth order bit rate of 139 264 kbit/s and using positive justification
$10.75 $25.00 -57%In StockITU-T T.390
ITU-T T.390 Teletex requirements for interworking with the telex service
$10.75 $25.00 -57%In StockITU-T G.611
ITU-T G.611 Characteristics of symmetric cable pairs for analogue transmission
$10.75 $25.00 -57%In StockITU-T R.150
ITU-T R.150 Automatic protection switching of dual diversity bearers
$10.75 $25.00 -57%In StockITU-T J.12
ITU-T J.12 Types of sound-programme circuits established over the international telephone network
$10.75 $25.00 -57%In StockITU-T R.52
ITU-T R.52 Standardization of international texts for the measurement of the margin of start-stop equipment
$10.75 $25.00 -57%In Stock
