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Standard ECMA-142
Private Integrated Services Network (PISN) - Circuit Mode 64kbit/s Bearer Services - Service Description, Functional Capabilities and Information Flows (BCSD)

3rd edition (December 2001)

This Standard specifies the service description and control aspects, including functional capabilities and information flows, of standardised circuit-mode bearer services which may be supported by a Private Integrated Services Network (PISN).

This Standard includes the following basic services:

  • Circuit-mode 64 kbit/s unrestricted 8 kHz structured bearer service category;
  • Circuit-mode 64 kbit/s 8 kHz structured bearer service category usable for speech information transfer;
  • Circuit-mode 64 kbit/s 8 kHz structured bearer service category usable for 3,1 kHz audio information transfer.
A PISN shall support at least one of the above three bearer services to conform with this Standard.

The scope of this Standard does not include:

  • the negotiation of service at call establishment time,
  • the change of service during a call, and
  • unidirectional services.

This Standard includes optional procedures for the provision of functions equivalent to the following public ISDN supplementary services: Subaddress and Multiple Subscriber Number.

The following file can be freely downloaded:

File name Size (Bytes) Content
ECMA-142.pdf 1 437 339    Acrobat (r) PDF file

This Ecma publication is also approved as ISO/IEC 11574.

The previous replaced "historical" editions of this Ecma Standard are available here.


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