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TRANSMISSION OF DATA
PHYSICAL NETWORK TECHNIQUES
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acceptor amplitude ASCII binary bit is set block check character British Telecom buffer byte cable called card reader carrier CCITT central computer channel number clock connected containing control characters control terminal data link data messages Data Signal Rate Data Terminal data transmission described destination detected device dial-up EBCDIC equipment error event flag example executive facilities file transfer filestore frame frequency function gateway hardware I-frames implemented indicate input LAP-B leased line line printer link level machine modem modulation node occur octal operating system packet level packet switched network parity bit peripheral poll processor queue receive data remote job entry request send data sent sequence count sequence number signal specified speed station status register Strathclyde string synchronous tape task teleprinter transmitted Transport Service unset X.25 network X.25 packet zero