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Integrated Services Digital Network (ISDN). Call Hold (HOLD) supplementary service. Digital Subscriber Signalling System No. one (DSS1) protocol. Part 1: Protocol specification
STANDARD published on 1.6.1995
Designation standards: ČSN ETS 300141-1
Classification mark: 877032
Catalog number: 17849
Publication date standards: 1.6.1995
SKU: NS-170878
The number of pages: 2
Approximate weight : 6 g (0.01 lbs)
Country: Czech technical standard
Category: Technical standards ČSN
1.7.1999
1.12.1997
1.7.1999
1.10.1997
1.7.1999
1.12.1997
Latest update: 2025-07-25 (Number of items: 2 209 786)
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