ITU-T Q.731.4
STAGE 3 DESCRIPTION FOR NUMBER IDENTIFICATION SUPPLEMENTARY SERVICES USING SIGNALLING SYSTEM No. 7 - CLAUSE 4 - CALLING LINE IDENTIFICATION RESTRICTION (CLIR)
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| Organization: | ITU-T |
| Publication Date: | 1 March 1993 |
| Status: | inactive |
| Page Count: | 42 |
scope:
FOREWORD
The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of the International Telecommunication Union. The ITU-T is responsible for studying technical, operating and tariff questions and issuing Recommendations on them with a view to standardizing telecommunications on a worldwide basis.
The World Telecommunication Standardization Conference (WTSC), which meets every four years, established the topics for study by the ITU-T Study Groups which, in their turn, produce Recommendations on these topics.
ITU-T Recommendation Q.731, clauses 3, 4, 5 and 6, was prepared by the ITU-T Study Group XI (1988-1993) and was approved by the WTSC (Helsinki, March 1-12, 1993).
Document History
April 1, 2019
Stage 3 description for number identification supplementary services using Signalling System No. 7 – Calling line identification restriction
This Recommendation provides a signalling procedure for calling line identification restriction (CLIR). It specifies service description, coding requirements and operation requirements of CLIR. It...
ITU-T Q.731.4
March 1, 1993
STAGE 3 DESCRIPTION FOR NUMBER IDENTIFICATION SUPPLEMENTARY SERVICES USING SIGNALLING SYSTEM No. 7 - CLAUSE 4 - CALLING LINE IDENTIFICATION RESTRICTION (CLIR)
FOREWORD
The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of the International Telecommunication Union. The ITU-T is responsible for studying technical, operating and...