ITU-T Recommendations : Series U – Telegraph switching
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ITU-T Recommendations: Series U
(Telegraph switching)
ITU-T Recommendations In force – December 2000 edition
ITU-T Rec. U.1 (03/93) Signalling conditions to be applied in the international telex service
ITU-T Rec. U.2 (11/88) Standardization of dials and dial pulse generators for the international telex service
ITU-T Rec. U.3 (11/88) Arrangements in switching equipment to minimize the effects of false calling signals
ITU-T Rec. U.4 (11/88) Exchange of information regarding signals destined to be used over international circuits concerned with switched teleprinter networks
ITU-T Rec. U.5 (11/88) Requirements to be met by regenerative repeaters in international connections
ITU-T Rec. U.6 (11/88) Prevention of fraudulent transit traffic in the fully automatic international telex service
ITU-T Rec. U.7 (03/93) Numbering schemes for automatic switching networks
ITU-T Rec. U.8 (11/88) Hypothetical reference connections for telex and gentex networks
ITU-T Rec. U.10 (03/93) Equipment of an international telex position
ITU-T Rec. U.11 (03/93) Telex and gentex signaling on intercontinental circuits used for intercontinental automatic transit traffic (type c signaling)
ITU-T Rec. U.12 (03/93) Terminal and transit control signalling system for telex and similar services on international circuits (type D signalling)
ITU-T Rec. U.15 (03/93) Interworking rules for international signalling systems according to Recommendations U.1, U.11 and U.12
ITU-T Rec. U.20 (11/88) Telex and gentex signalling on radio channels (synchronous 7-unit systems affording error correction by automatic repetition).
ITU-T Rec. U.21 (11/88) Operator recall on a telex call set up on a radiotelegraph circuit
ITU-T Rec. U.22 (11/88) Signals indicating delay in transmission on calls set up by means of synchronous systems with automatic error correction by repetition
ITU-T Rec. U.23 (11/88) Use of radiotelegraph circuits with ARQ equipment for fully automatic telex calls charged on the basis of elapsed time
ITU-T Rec. U.24 (11/88) Requirements for telex and gentex operation to be met by synchronous multiplex equipment described in Recommendation R.44
ITU-T Rec. U.25 (11/88) Requirements for telex and gentex operation to be met by code- and
speed-dependent TDM systems conforming to Recommendation R.101
ITU-T Rec. U.30 (11/88) Signalling conditions for use in the international gentex network
ITU-T Rec. U.31 (11/88) Prevention of connection to faulty stations and/or station lines in the gentex service
ITU-T Rec. U.40 (03/93) Reactions by automatic terminals connected to the telex network in the event of ineffective call attempts or signalling incidents
ITU-T Rec. U.41 (11/88) Changed address interception and call redirection in the telex service
ITU-T Rec. U.43 (11/88) Follow-on calls
ITU-T Rec. U.44 (11/88) Multi-address calls in real time for broadcast purposes in the international telex service
ITU-T Rec. U.45 (03/93) Response to the not-ready condition of the telex terminal
ITU-T Rec. U.46 (03/93) Interruption of automatic transmission and flow control in the international telex service.
ITU-T Rec. U.60 (11/88) General requirements to be met in interfacing the international telex network with the maritime satellite systems
ITU-T Rec. U.61 (03/93) Detailed requirements to be met in interfacing the international telex network with maritime satellite systems
ITU-T Rec. U.62 (03/93) General requirements to be met in interfacing the international telex network with the fully automated maritime VHF/UHF radio system
ITU-T Rec. U.63 (11/88) General requirements to be met in interfacing the international telex network with the maritime “direct printing” system
ITU-T Rec. U.70 (11/88) Telex service signals for telex to Teletex interworking
ITU-T Rec. U.74 (11/88) Extraction of telex selection information from a calling telex answerback
ITU-T Rec. U.75 (03/93) Automatic called telex answerback check
ITU-T Rec. U.80 (03/93) International telex store and forward access from a telex subscriber
ITU-T Rec. U.81 (10/96) International telex store-and-forward – Delivery to a telex subscriber
ITU-T Rec. U.101 (03/93) Signalling systems for the Intex service (Types E and F signalling)
ITU-T Rec. U.102 (07/96) Intex and similar services … Network requirements to effect interworking between terminals operating at different speeds
ITU-T Rec. U.140 (11/88) Definitions of essential technical terms relating to telegraph switching and signalling
ITU-T Rec. U.200 (03/93) The international telex service – General technical requirements for interworking.
ITU-T Rec. U.201 (03/93) Interworking between the teletex service and the international telex service
ITU-T Rec. U.202 (03/93) Technical requirements to be met in providing the international telex service within an integrated services digital network
ITU-T Rec. U.203 (03/93) Technical requirements to be met when providing real-time bothway communications between terminals of the international telex service and data terminal equipments on a PSPDN or via the PSTN
ITU-T Rec. U.204 (03/93) Interworking between the international telex service and the public interpersonal messaging service
ITU-T Rec. U.205 (03/93) Store-and-retrieve facility for the delivery of messages from a terminal of the international telex service to a data terminal equipment which connects to a packet-switched public data network over the public switched…
ITU-T Rec. U.206 (03/93) Technical requirements for interworking between the international telex service and the videotex service
ITU-T Rec. U.207 (03/93) Technical requirements to be met for the transfer of messages between terminals of the international telex service and Group 3 facsimile terminals connected to the PSTN
ITU-T Rec. U.208 (10/96) The international telex service – Interworking with the INMARSAT C system using one-stage selection
ITU-T Rec. U.210 (03/93) Intex service Network requirements to effect interworking with the international telex service
ITU-T Rec. U.220 (03/93) The international telex service – Technical requirements for a status inquiry function in an interworking scenario
For access, recommendations ITU-T Series U Click Here
For access, recommendations ITU-T Series U Click Here
