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ITU-T I.220
COMMON DYNAMIC DESCRIPTION OF BASIC TELECOMMUNICATION SERVICES
Year: 1988
Abstract: Introduction
This Recommendation provides the dynamic description of basic telecommunication services. The dynamic description for basic telecommunication services using the circuit-mode means of service establishment/disestablishment is provided in § 2. The packet-mode description is for further study.
The dynamic description shows the flow of events, and states within the service, in a time-sequenced format and identifies all possible actions relevant to the service as perceived by end-users.
Although the service is described from the end-user perspective it does not concern details of the human-tomachine interface itself. In addition, the service description considers the network as a single entity. For example, information flows between nodes within the network are not shown.
End-user perceptions of the service are shown in terms of "user/network" interactions. Internal network actions are included whenever they are or can be perceived by an end-user during the operation of the service, and as required by SDL drawing rules.
The terminology and the meaning of the "user/network" interactions are provided in Annex A. The means for developing dynamic descriptions, e.g. the SDL symbols and their usage, is further elaborated in Recommendation I.210.
Note - In the development of the circuit-mode dynamic description, the bearer services (speech, 3.1 kHz audio, unrestricted) and the teleservices (telephony, Teletex, Telefax 4, mixed-mode and Videotex) were considered. Others are for further study.
This Recommendation provides the dynamic description of basic telecommunication services. The dynamic description for basic telecommunication services using the circuit-mode means of service establishment/disestablishment is provided in § 2. The packet-mode description is for further study.
The dynamic description shows the flow of events, and states within the service, in a time-sequenced format and identifies all possible actions relevant to the service as perceived by end-users.
Although the service is described from the end-user perspective it does not concern details of the human-tomachine interface itself. In addition, the service description considers the network as a single entity. For example, information flows between nodes within the network are not shown.
End-user perceptions of the service are shown in terms of "user/network" interactions. Internal network actions are included whenever they are or can be perceived by an end-user during the operation of the service, and as required by SDL drawing rules.
The terminology and the meaning of the "user/network" interactions are provided in Annex A. The means for developing dynamic descriptions, e.g. the SDL symbols and their usage, is further elaborated in Recommendation I.210.
Note - In the development of the circuit-mode dynamic description, the bearer services (speech, 3.1 kHz audio, unrestricted) and the teleservices (telephony, Teletex, Telefax 4, mixed-mode and Videotex) were considered. Others are for further study.
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| contributor author | ITU-T - International Telecommunication Union/ITU Telcommunication Sector | |
| date accessioned | 2017-09-04T18:26:54Z | |
| date available | 2017-09-04T18:26:54Z | |
| date copyright | 1988.11.01 | |
| date issued | 1988 | |
| identifier other | AIAQPCAAAAAAAAAA.pdf | |
| identifier uri | http://yse.yabesh.ir/std;quessioutho4703177793325273135A68A10958014/handle/yse/209084 | |
| description abstract | Introduction This Recommendation provides the dynamic description of basic telecommunication services. The dynamic description for basic telecommunication services using the circuit-mode means of service establishment/disestablishment is provided in § 2. The packet-mode description is for further study. The dynamic description shows the flow of events, and states within the service, in a time-sequenced format and identifies all possible actions relevant to the service as perceived by end-users. Although the service is described from the end-user perspective it does not concern details of the human-tomachine interface itself. In addition, the service description considers the network as a single entity. For example, information flows between nodes within the network are not shown. End-user perceptions of the service are shown in terms of "user/network" interactions. Internal network actions are included whenever they are or can be perceived by an end-user during the operation of the service, and as required by SDL drawing rules. The terminology and the meaning of the "user/network" interactions are provided in Annex A. The means for developing dynamic descriptions, e.g. the SDL symbols and their usage, is further elaborated in Recommendation I.210. Note - In the development of the circuit-mode dynamic description, the bearer services (speech, 3.1 kHz audio, unrestricted) and the teleservices (telephony, Teletex, Telefax 4, mixed-mode and Videotex) were considered. Others are for further study. | |
| language | English | |
| title | ITU-T I.220 | num |
| title | COMMON DYNAMIC DESCRIPTION OF BASIC TELECOMMUNICATION SERVICES | en |
| type | standard | |
| page | 11 | |
| status | Active | |
| tree | ITU-T - International Telecommunication Union/ITU Telcommunication Sector:;1988 | |
| contenttype | fulltext |