Digital subscriber signalling system No. 1 (DSS 1), data link layer (Recommendations Q.920-Q921)
15
Main Authors: | International Telegraph and Telephone Consultative Committee, International Telecommunication Union, CCITT Plenary Assembly (9th : 1988 : Melbourne, Australia) |
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Format: | |
Published: |
Geneva : ITU,
1989
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Subjects: |
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