Private Integrated Services Network (PISN)
- Specification, Functional Model and Information Flows - Recall
Supplementary Service (RESD)
3rd edition (December 2001)
This Standard specifies supplementary service Recall (SS-RE),
which is applicable to various basic services supported by Private
Integrated Services Networks (PISN). Basic services are specified
SS-RE is a supplementary service which provides for the redirection
of a call transferred by the served user back to the served user
if the call is unanswered. SS-RE is only applicable after transfer
by join, not after transfer by rerouteing.
Service specifications are produced in three stages, according
to the method described in ETS 300 387. This Standard contains
the stage 1 and stage 2 specifications of SS-RE. The stage 1 specification
(clause 6) specifies the supplementary service as seen by users
of PISNs. The stage 2 specification (clause 7) identifies the
functional entities involved in the supplementary service and
the information flows between them.
The following file can be freely downloaded:
||Acrobat (r) PDF file
This Ecma publication is also approved as ISO/IEC 15051.
The previous replaced "historical" editions of this Ecma Standard are available here.