Specifications of signalling system No 6 : recommendations Q.251-Q.300

Specifications of signalling system No 6 : recommendations Q.251-Q.300

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Bibliographic Details
Main Authors: International Telegraph and Telephone Consultative Committee, International Telecommunication Union, CCITT Plenary Assembly (9th : 1988 : Melbourne, Australia)
Format:
Published: Geneva : ITU, 1989
Subjects:
Telephone
Telephone switching systems, Electronic

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