ITU E.140:1992
ITU E.140:1992 Operator-assisted Telephone Service
Table of Contents
1Scope2Typesofoperationandclassesofcall
3Facilitiesofferedtousers
4Callrequest
4.1Demandoperatingandadvancepreparation
4.2Validityofcallrequests
5Routingofcalls
6Chargeableduration
7Timetoanswerbyoperators
8Instructionsforoperators
9Trainingofstaffoperatinginternationalpositions
References