Private Integrated Services Network (PISN)
- Specification, Functional Model and Information Flows - Simple
Dialog Supplementary Service (SDSD)
This Standard specifies the supplementary service Simple Dialog
(SS-SD), which is applicable to various basic services supported
by Private Integrated Services Networks (PISNs). Basic services
are specified in ECMA-142.
Supplementary service SD enables a user to communicate with another
user or application by the exchange of keypad and display information
transparently over a PISN.
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-SD. The stage 1 specification
(clause 6) specifies the supplementary service as seen by users
of PISNs. The stage 2 specification (clause 7) specifies 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 21407.