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Integrated Services Digital Network (ISDN). Generic keypad protocol for the support of supplementary services. Digial Subscriber Signalling System No. one (DSS1) protocol. Part 1: Protocol specification
STANDARD published on 1.6.1995
Designation standards: ČSN ETS 300122-1
Classification mark: 877024
Catalog number: 17845
Publication date standards: 1.6.1995
SKU: NS-170824
The number of pages: 2
Approximate weight : 6 g (0.01 lbs)
Country: Czech technical standard
Category: Technical standards ČSN
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