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Standard

NEK ISO/IEC 17310:2000

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Abstract

This International Standard defines the mapping functions in exchanges of Private Integrated Services Networks (PISNs)required for the utilization of scenarios in which 64 kbit/s circuit mode connections are sub-multiplexed into 4 x 16 kbit/schannels for carrying inter-PINX signalling and user information.NOTE 1 - This International Standard has been prepared to meet the specific needs of an application for a particular user organisation.However, it may also be applicable elsewhere. The requirements contained in this International Standard will be incorporated in any futurestandard specifying a more generic approach to bearer conditioning.In order to connect a Private Integrated Services Network Exchange (PINX) to another PINX, mapping functions are requiredto adapt the specific interfaces at the C reference point to the application at the Q reference point. As such, mapping functionsprovide for physical adaptation to the interface at the C reference point. Mapping functions also provide for the mapping ofuser channels and signalling information at the Q reference point to the appropriate channels or timeslots at the C referencepoint.The C and Q reference points are defined in ISO/IEC 11579-1.The type of interface at the C reference point covered by this International Standard is the 64 kbit/s Unrestricted Digital LeasedLine (D64U) Terminal Equipment Interface, in accordance with ITU-T Rec. G.703.At the Q reference point the mapping provides a 16 kbit/s service for user channels to support the transfer of unrestricteddigital information and to support the transfer of speech, and a packet mode service for the signalling channel. The appliedmapping is a static mapping, i.e. there is a fixed relationship between user and signalling channels at the Q reference point andthe interface at the C reference point.Management functions relating to failure management are outside the scope of this International Standard.This International Standard is applicable to PINXs that can be interconnected to form a Private Integrated Services Network(PISN) and that support signalling protocols at the Q reference point.

Document information

  • Standard from NEK
  • Published:
  • Edition: 1.0
  • Version: 1
  • Document type: NAT
  • Pages
  • ICS 33.040.35
  • National Committee ISO/IEC JTC 1/SC 6