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<p>This International Standard defines the mapping functions in exchanges of Private Integrated Services Networks (PISNs)</p>
<p>required for the utilization of scenarios in which 64 kbit/s circuit mode connections are sub-multiplexed into 4 x 16 kbit/s</p>
<p>channels for carrying inter-PINX signalling and user information.</p>
<p>NOTE 1 - This International Standard has been prepared to meet the specific needs of an application for a particular user organisation.</p>
<p>However, it may also be applicable elsewhere. The requirements contained in this International Standard will be incorporated in any future</p>
<p>standard specifying a more generic approach to bearer conditioning.</p>
<p>In order to connect a Private Integrated Services Network Exchange (PINX) to another PINX, mapping functions are required</p>
<p>to adapt the specific interfaces at the C reference point to the application at the Q reference point. As such, mapping functions</p>
<p>provide for physical adaptation to the interface at the C reference point. Mapping functions also provide for the mapping of</p>
<p>user channels and signalling information at the Q reference point to the appropriate channels or timeslots at the C reference</p>
<p>point.</p>
<p>The C and Q reference points are defined in ISO/IEC 11579-1.</p>
<p>The type of interface at the C reference point covered by this International Standard is the 64 kbit/s Unrestricted Digital Leased</p>
<p>Line (D64U) Terminal Equipment Interface, in accordance with ITU-T Rec. G.703.</p>
<p>At the Q reference point the mapping provides a 16 kbit/s service for user channels to support the transfer of unrestricted</p>
<p>digital information and to support the transfer of speech, and a packet mode service for the signalling channel. The applied</p>
<p>mapping is a static mapping, i.e. there is a fixed relationship between user and signalling channels at the Q reference point and</p>
<p>the interface at the C reference point.</p>
<p>Management functions relating to failure management are outside the scope of this International Standard.</p>
<p>This International Standard is applicable to PINXs that can be interconnected to form a Private Integrated Services Network</p>
<p>(PISN) and that support signalling protocols at the Q reference point.</p>
Reģistrācijas numurs (WIID)
32970
Darbības sfēra
<p>This International Standard defines the mapping functions in exchanges of Private Integrated Services Networks (PISNs)</p>
<p>required for the utilization of scenarios in which 64 kbit/s circuit mode connections are sub-multiplexed into 4 x 16 kbit/s</p>
<p>channels for carrying inter-PINX signalling and user information.</p>
<p>NOTE 1 - This International Standard has been prepared to meet the specific needs of an application for a particular user organisation.</p>
<p>However, it may also be applicable elsewhere. The requirements contained in this International Standard will be incorporated in any future</p>
<p>standard specifying a more generic approach to bearer conditioning.</p>
<p>In order to connect a Private Integrated Services Network Exchange (PINX) to another PINX, mapping functions are required</p>
<p>to adapt the specific interfaces at the C reference point to the application at the Q reference point. As such, mapping functions</p>
<p>provide for physical adaptation to the interface at the C reference point. Mapping functions also provide for the mapping of</p>
<p>user channels and signalling information at the Q reference point to the appropriate channels or timeslots at the C reference</p>
<p>point.</p>
<p>The C and Q reference points are defined in ISO/IEC 11579-1.</p>
<p>The type of interface at the C reference point covered by this International Standard is the 64 kbit/s Unrestricted Digital Leased</p>
<p>Line (D64U) Terminal Equipment Interface, in accordance with ITU-T Rec. G.703.</p>
<p>At the Q reference point the mapping provides a 16 kbit/s service for user channels to support the transfer of unrestricted</p>
<p>digital information and to support the transfer of speech, and a packet mode service for the signalling channel. The applied</p>
<p>mapping is a static mapping, i.e. there is a fixed relationship between user and signalling channels at the Q reference point and</p>
<p>the interface at the C reference point.</p>
<p>Management functions relating to failure management are outside the scope of this International Standard.</p>
<p>This International Standard is applicable to PINXs that can be interconnected to form a Private Integrated Services Network</p>
<p>(PISN) and that support signalling protocols at the Q reference point.</p>
