Private Integrated Services Network (PISN)
- Mapping Functions for the Employment of Dedicated Circuit Mode
Connections as Inter-PTNX Connections (MAPPING-CM-STATIC)
This Standard defines the mapping functions in exchanges of Private
Integrated Services Networks (PISNs) required for the utilization
of intervening network (IVN) scenarios which provide dedicated
circuit mode connections for carrying inter-PINX signalling and
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 time-slots at the C reference point.
The C and Q reference points are defined in ISO/IEC
The types of interfaces at the C reference point covered by this
- 2048 kbit/s Primary Rate User-Network Layer 1 Interface,
in accordance with ETS 300 011 including the requirements for
the "Application of the ETS 300 011 for PTNX interconnections"
as contained in ETS 300 011 Annex A.
- Basic User-Network Layer 1 Interface, in accordance with
ETS 300 012, excluding the point-to-multi-point mode of operation.
- 2048 kbit/s Digital Structured Leased Line (D2048S); Terminal
Equipment Interface, in accordance with ETS 300 420.
- 2048 kbit/s Digital Unstructured Leased Line (D2048U); Terminal
Equipment Interface, in accordance with ETS 300 248.
- 64 kbit/s Unrestricted Digital Leased Line (D64U); Terminal
Equipment Interface, in accordance with ETS 300 290.
The IVN can be a dedicated transmission system or a cross connect
system. IVNs which include inverse multiplexer techniques (e.g.
channel aggregation in accordance with ISO/IEC
are covered by this Standard as far as they support one of the interfaces
At the Q reference point the mappings provide a 64 kbit/s service
for user channels and a packet mode service for the signalling
channel. Bearer conditioning is outside the scope of this Standard,
except for deriving 64 kbit/s channels and for providing the services
of layer 2 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 timeslots
of the interface at the C reference point; any changes are subject
to administrative actions.
Management functions relating to failure management are outside
the scope of this Standard.
This Standard is applicable to PINXs which can be interconnected
to form a Private Integrated Services Network (PISN) and which
support signalling protocols at the Q reference point.
The following file can be freely downloaded:
||Acrobat (r) PDF file