ETSI - PRETS 300 141-2
Integrated Services Digital Network (ISDN); Call Hold (HOLD) Supplementary Service; Digital Subscriber Signalling System No. One (DSS1) Protocol; Part 2: Protocol Implementaion Conformance Statement (PICS) Proforma Specification
|Publication Date:||1 January 1995|
This second part of ETS 300 141 is applicable to the stage three of the Call Hold (HOLD) supplementary service for the pan-European Integrated Services Digital Network (ISDN) as provided by European public telecommunications operators at the T reference point or coincident S and T reference point (as defined in ITU-T Recommendation I.411 ) by means of the Digital Subscriber Signalling System No. one (DSS1) protocol. Stage three identifies the protocol procedures and switching functions needed to support a telecommunications service (see CCITT Recommendation I.130 ).
This ETS provides the Protocol Implementation Conformance Statement (PICS) proforma for the ISDN DSS1 HOLD supplementary service protocol as specified in ETS 300 141-1  in compliance with the relevant requirements and in accordance with the relevant guidance given in ISO/IEC 9646-7 .
The supplier of a protocol implementation which is claimed to conform to ETS 300 141-1  is required to complete a copy of the PICS proforma provided in annex A of this ETS and is required to provide the information necessary to identify both the supplier and the implementation.