ITU U.1:1993
ITU U.1:1993 Signalling Conditions To Be Applied In The International Telex Service
Table of Contents
1Signallingtypes2Freelinecondition
3Call
4Call-confirmationsignal
5Signalsprecedingselection
5.1Proceed-to-selectsignal
5.2Proceed-to-transmitsignal
6Selectionsignals
7Call-connectedsignal
8Idlecircuitcondition
9Clearing
9.1Clearingsignal
9.2Clear-confirmationsignal
9.3Guarddelay
10Servicesignals
10.1Signalsforineffectivecalls
10.2Waitingsignals
10.3Service-connectedsignal
10.4Backwardbusyingsignal
10.5Retestsignal
11Setting-uptime
12Both-wayworking
13Transitworking
References