ITU-T Q.955.3-1993 STAGE 3 DESCRIPTION FOR COMMUNITY OF INTEREST SUPPLEMENTARY SERVICES USING DSS 1 CLAUSE 3 - MULTI-LEVEL PRECEDENCE AND PREEMPTION (MLPP) (Study Group XI)
ITU-T - International Telecommunication Union/ITU Telcommunication Sector
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ITU-T Q.955.3-1993
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.955@ clause 3@ was prepared by the ITU-T Study Group XI (1988-1993) and was approved by the WTSC (Helsinki@ March 1-12@ 1993).
ITU-T Q.955.3-1993 history
1993ITU-T Q.955.3-1993 STAGE 3 DESCRIPTION FOR COMMUNITY OF INTEREST SUPPLEMENTARY SERVICES USING DSS 1 CLAUSE 3 - MULTI-LEVEL PRECEDENCE AND PREEMPTION (MLPP) (Study Group XI)