I.S. ETS 300 141:1993
Current
The latest, up-to-date edition.
INTEGRATED SERVICES DIGITAL NETWORK (ISDN) - CALL HOLD (HOLD) SUPPLEMENTARY SERVICE DIGITAL SUBSCRIBER SIGNALLING SYSTEM NO. ONE (DSS1) PROTOCOL
12-01-2013
Specifies 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 by means of the Digital Subscriber Signalling System No. one (DSS1) protocol.
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