Technical Report TR/76
PISN - Architecture and Scenarios for
Private Integrated Services Networking
A Private Integrated Service Network (PISN) is a network comprising
either one PINX or more than one PINX interconnected by Inter-PINX
connections. This Technical Report is concerned with inter-PINX
connections (IPC) that are provided by Intervening Networks (IVN),
and the way in which these are handled by PINXs to provide a platform
for inter-PINX communication. Different types of IVNs can be used
to provide IPCs, in accordance with the scenarios indicated in
These are Overlay Scenarios in that they enable the services of
the PISN to operate transparently across an IVN.
Connected PINXs need to co-ordinate their use of IVNs, and appropriate
standardisation is needed to allow networks to be created employing
PINXs and IVNs from multiple vendors. The following points need
to be considered:
- In general but depending on the type of IVN, procedures and
signalling protocols between the PINXs are needed for the establishment,
maintenance and release of IPCs. Appropriate standardisation
of these procedures and signalling protocols is necessary.
- At the Q-reference point (a conceptual point within a PINX)
channels and PISN call control signalling (QSIG) are defined
independently of the type of IVN. However, at the C-reference
point (where the PINX is connected to the IVN), the representation
of the channels and of signalling is dependent on the type of
IVN, and on how the PINXs use the IPCs. Appropriate standardisation
of these aspects at the C reference point is necessary.
- In general the relationship between a channel at the Q-reference
point and its representation at the C-reference point is not
static, and procedures and signalling between the PINXs are
needed for the co-ordination of these relationships. Appropriate
standardisation of these procedures and signalling is necessary.
- Appropriate mechanisms need to be standardised for conveying
inter-PINX signalling through the IVN. These will depend on
the characteristics of the IPC used.
The aim of this Technical Report is to identify:
- In addition to PISN call control signalling (QSIG), what needs
to be standardised, in order to be able to inter-connect PINXs;
- General techniques, procedures, protocols etc., that apply
to of all (or at least very many) types of IVNs.
The following file can be freely downloaded:
||Acrobat (r) PDF file
This Ecma publication is also approved as ISO/IEC TR 14475.