CSA ISO/IEC 17311
Information technology - Telecommunications and information exchange between systems - Private Integrated Services Network - Mapping functions for the employment of 64 kbit/s circuit mode connections with 8 kbit/s sub-multiplexing
| Organization: | CSA |
| Publication Date: | 1 January 2004 |
| Status: | active |
| Page Count: | 25 |
| ICS Code (Telephone networks): | 33.040.35 |
scope:
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 one 16 kbit/s channel for carrying inter-PINX signalling and 6 x 8 kbit/s channels for carrying inter-PINX 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.
In order to connect a Private Integrated Services Network Exchange (PINX) to another PINX, mapping functions are required to adapt the specific interfaces at the C reference point to the application at the Q reference point. As such, mapping functions provide for physical adaptation to the interface at the C reference point. Mapping functions also provide for the mapping of user channels and signalling information at the Q reference point to the appropriate channels or timeslots at the C reference point.
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 Leased Line (D64U) Terminal Equipment Interface, in accordance with ITU-T Rec. G.703.
At the Q reference point the mapping provides an 8 kbit/s service for user channels to support the transfer of unrestricted digital information and to support the transfer of speech, and a 16 kbit/s packet mode service for the signalling channel. The applied mapping is a static mapping, i.e. there is a fixed relationship between user and signalling channels at the Q reference point and the 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 History
