ITU-T U.140 Definitions of Essential Technical Terms Relating to Telegraph Switching and Signalling - Telegraph Switching (Study Group IX) 13 pp

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ITU-T U.140 Document Information:

Title
Definitions of Essential Technical Terms Relating to Telegraph Switching and Signalling - Telegraph Switching (Study Group IX) 13 pp

International Telecommunication Union/ITU Telcommunication Sector

Publication Date:
Jan 1, 1989

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