ITU-T - Q.120
Definition and Function of Signals - Specifications of Signalling Systems Nos. 4 and 5 (Study Group XI) 5 pp
inactive
| Organization: | ITU-T |
| Publication Date: | 1 November 1988 |
| Status: | inactive |
| Page Count: | 5 |
Document History
November 1, 1988
Specifications of Signalling System No. 4
FOREWORD
The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications. The ITU Telecommunication Standardization Sector (ITU-T) is a...
Q.120
November 1, 1988
Definition and Function of Signals - Specifications of Signalling Systems Nos. 4 and 5 (Study Group XI) 5 pp
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