Private Integrated Services Network (PISN)
- Specification, Functional Model and Information Flows - Path
Replacement Additional Network Feature (ANF-PRSD)
3rd edition (December 1998)
This Standard specifies the Path Replacement additional network
feature (ANF-PR), which is applicable to various basic services
supported by Private Integrated Services Networks (PISN). Basic
services are specified in ECMA-142.
ANF-PR is a feature which applies to an established call, allowing
that call's connection between Private Integrated Services Network
Exchanges (PINXs) to be replaced by a new connection. If the new
connection is required to satisfy certain criteria, ANF-PR should
be used in conjunction with other supplementary services and/or
ANFs. Annex A gives examples of the circumstances under which
ANF-PR can be used and criteria which can govern the selection
of the new connection.
Additional network feature specifications are produced in three
stages, according to the method described in ETS 300 387 for supplementary
services. This Standard contains the stage 1 and stage 2 specifications
of ANF-PR. The stage 1 specification (clause 6) specifies the
feature as seen by an entity which initiates path replacement,
the ANF-PR user. The stage 2 specification (clauses 7, 8 and 9)
identifies the functional entities involved in the feature and
the information flows between them. Clause 7 contains the stage
2 specification for basic operation of the feature. Clause 8 contains
the stage 2 specification for an enhanced mode of working which
can be employed when supported by all the equipment involved.
It allows some of the elements of the old connection to be re-used.
Clause 9 contains the stage 2 specification for an optional enhancement
of the basic operation of the feature. It allows the ANF-PR user
to be located in any PINX in the old connection and to decide
the direction of the new connection.
The following file can be freely downloaded:
||Acrobat (r) PDF file
This Ecma publication is also approved as ISO/IEC 13863.
The previous replaced "historical" editions of this Ecma Standard are available here.