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  • BSI
    BS ISO/IEC 13871:1995 Information technology. Telecommunications and information exchange between systems. Private telecommunications networks. Digital channel aggregation
    Edition: 1998
    $569.57
    / user per year

Description of BS ISO/IEC 13871:1995 1998

This International Standard defines a set of procedures collectively called 'Digital Channel Aggregation', which are used in the provision of an aggregated bearer service. Digital channel aggregation involves a means for the combination of multiple switched or unswitched 56 kbit/s or 64 kbit/s digital communications channels across one or more public and/or private networks into higher bandwidth digital bi-directional channels between Channel Aggregation Units (CAUs) serving terminal applications at network endpoints. Figure 1 below illustrates a typical channel aggregation scenario.

Figure 1 Channel Aggregation Scenario

image

In defining the channel aggregation procedures, this International Standard sets out the means used by a CAU to

  • establish the parameters to be used for the aggregated connection

  • synchronise and align multiple communications channels to maintain the bit sequence integrity of the aggregated bandwidth across the network(s)

  • optionally monitor data transfer throughout a call to detect failure modes

  • institute failure recovery procedures

  • optionally dynamically vary the bandwidth on demand during a call.

The channel aggregation procedures above are defined at the interface between the CAU and the network in terms of the frame structure and information messages applied to individual communications channels. Not defined by this International Standard are

  • the call control procedures used to establish and disconnect the individual communications channels that make up the higher bandwidth connections

  • the higher level protocols or applications that use the channel aggregation services

  • the frame structure on the individual communications channels at the physical interface between the CAU and the network as required for 'normal' 56 kbit/s or 64 kbit/s bearer services as opposed to aggregated bearer services

  • the electrical characteristics of the individual communications channels at the physical interface between the CAU and the network.



Standard NumberBS ISO/IEC 13871:1995
TitleInformation technology. Telecommunications and information exchange between systems. Private telecommunications networks. Digital channel aggregation
StatusDefinitive
Publication Date1998-08-15
Identical National Standard OfISO/IEC 13871:1995
DescriptorsDigital signals, Private integrated services network, Information exchange, Data transfer, Network layer (OSI), ISDN, Data layout, Selection, Identification methods, Flow charts, Private networks, Messages, Numerical designations, Telecommunication transmission methods, Communication networks, Data transmission, Data processing, Open systems interconnection, Communication procedures, Information transfer, Telecommunication
ICS33.040.35 Telephone networks
CommitteeIST/6
ISBN0 580 30311 X
PublisherBSI
Pages102

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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