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  • BSI
    BS ISO/IEC 7480:1991 Information technology. Telecommunications and information exchange between systems. Start-stop transmission signal quality at DTE/DCE interfaces
    Edition: 1992
    $316.70
    / user per year

Description of BS ISO/IEC 7480:1991 1992

1.1

This International Standard specifies signal quality requirements for serial data transmission at the interface between start-stop transmission Data Terminal Equipment (DTE) and Data Circuit-terminating Equipment (DCE). The interface referred to in this International Standard conforms to CCITT Recommendations V.24 (telephone networks) and X.24 (data networks) as specified in DCEs of the following CCITT Recommendations:

  • V.21, V.22, V.22 bis, V.23, V.26 ter, V.32, V.32 bis, X.20, X.20 bis together with V.28 electrical characteristics;

  • X.20 together with V.10 and/or V.11 electrical characteristics.

The signal quality requirement is limited to start-stop transmission at the interface with asynchronous DCEs, or with synchronous DCEs operating in asynchronous mode in accordance with CCITT Recommendations V.14 or V.42. Signal quality pertaining to DTEs working in a synchronous mode of operation is not part of this International Standard.

This International Standard is also applicable when the interface as specified in the above CCITT Recommendations is provided at the ISDN Reference point R as defined in CCITT Recommendation I.411 and as specified in CCITT Recommendations V.110, V.120 and X.30.

1.2

The signal quality characteristics apply regardless of whether or not multiplexing equipment is included. They do not apply where there is intermediate equipment and no signal regeneration is provided between interconnected sections.

1.3

This International Standard does not describe the signal quality of the DCE or the line associated with it. Neither does it describe any requirement for an acceptable bit error rate.

1.4

This International Standard does not specify the speed characteristics. The nominal value of the modulation rate and the character interval are application dependent.



Standard NumberBS ISO/IEC 7480:1991
TitleInformation technology. Telecommunications and information exchange between systems. Start-stop transmission signal quality at DTE/DCE interfaces
StatusConfirmed
Publication Date1992-04-01
ReplacesBS 6638-1:1987
Identical National Standard OfISO/IEC 7480:1991
DescriptorsTesting conditions, Computer terminals, Signal distortion, Data transmission, Data circuit-terminating equipment, Grades (quality), Circuits, Digital signals, Data processing, Data transfer, Test equipment, Interfaces (data processing), Electrical wave measurement, Quality, Information exchange, Start-stop transmission
ICS35.200 Interface and interconnection equipment
CommitteeIST/6
ISBN0 580 20792 7
PublisherBSI
Pages20

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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