ITU-T V 7-1988 DEFINITIONS OF TERMS CONCERNING DATA COMMUNICATION OVER THE TELEPHONE NETWORK《电话网上数据通信术语的定义-电话网络上的数据交流 第IX研究组 第3页》.pdf

1、INTERNATIONAL TELECOMMUNICATION UNION)45G134 6 TELECOMMUNICATIONSTANDARDIZATION SECTOROF ITU$!4!G0G0#/-5.)#!4)/.G0G0/6%2G0G04(%G0G04%,%0(/.%.%47/2+$% amended at Malaga-Torremolinos, 1984 and at Melbourne, 1988)Note - This Recommendation contains only new and amended definitions of terms concerning d

2、atacommunication over the telephone network which were elaborated by Study Group XVII since 1977 and approved bythe VIIth and VIIIth Plenary Assemblies of the CCITT.It should be noted that there exist a large number of relevant definitions in force which have been published inthe List of definitions

3、 of essential telecommunication terms, Part I (including its two Supplements), Green Book,Volume VIII and Orange Book, Volume VIII.2.1 effective data transfer rateF: dbit effectif du transfert des donnesS: velocidad real de transferencia de datosThe average number of bits, characters, or blocks per

4、unit time transferred from a data source to a data sinkand accepted as valid. It is expressed in bits, characters, or blocks per second, minute, or hour.2 error controlF: contrle des erreursS: control de errores (proteccin contra errores)That part of a protocol controlling the detection and possibly

5、 the correction of transmission errors.3 data concentratorF: concentrateur de donnesS: concentrador de datosEquipment that permits a common transmission medium to serve more data sources than there are datachannels currently available within the transmission medium.4 simple multipoint circuitF: circ

6、uit multipoint simpleS: circuito multipunto simpleA multipoint circuit that does not contain more than two DCEs in series and that provides for centralizedmultipoint operation.5 inband signallingF: signalisation dans la bandeS: sealizacin dentro de bandaThe exchange of control signals between interc

7、onnected DCEs using the DCE line signal band with whichdata in the forward channel are transmitted. The transmission of DTE data, if any, is disrupted.2 Fascicle VIII.1 - Rec. V.76 out-of-band signallingF: signalisation hors bandeS: sealizacin fuera de bandaThe exchange of control signals between in

8、terconnected DCEs using signals other than those for thetransmission of data in the forward channel. The transmission of DTE data is not disrupted.7 coded inband signallingF: signalisation dans la bande avec codageS: sealizacin codificada dentro de bandaInband signalling by which control signals are

9、 exchanged via data in the forward channel.8 half-duplex operationF: exploitation en semi-duplexS: explotacin (o funcionamiento) semidplexThe exchange of data in either direction, one direction at a time.9 interface rateF: dbit linterfaceS: velocidad de interfazThe transfer rate of the bit stream fo

10、und on the physical interchange circuits.10 information rateF: dbit dinformationS: velocidad de informacinThe transfer of information bits (the equivalent of the bit rate of circuit 103 or 104 on a V.24 interface).11 control signalling rateF: dbit de la signalisation de commandeS: velocidad de seali

11、zacin de controlThe transfer rate of the encoded and multiplexed control signalling (the equivalent of V.24 and V.25interchange circuits, except the data and timing circuits, insofar as required for an application, with the possibility ofadding other signalling).12 parallel automatic callingF: appel

12、 automatique en parallleS: llamada automtica paralelo; llamada automtica en modo paraleloA procedure by which a DTE, by use of the 200 series interchange circuits, may instruct a DCE to perform thecall establishment function. The transmission, from DTE to DCE, of each digit to be dialled is achieved

13、 in parallel formon interchange circuits 206 to 209.13 serial automatic callingF: appel automatique en srieS: llamada automtica serie; llamada automtica en modo serieA procedure by which a DTE, by use of the 100 series interchange circuits, may instruct a DCE to performFascicle VIII.1 - Rec. V.7 3th

14、e call establishment function. The transmission from DTE to DCE, of each digit to be dialled, is achieved in serialform on interchange circuit 103.14 start-stop transmissionF: transmission arythmiqueS: transmisin arrtmicaA form of anisochronous transmission in which each group of contiguous data units is preceded by a startsignal and is terminated by a stop signal.