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Integrated Services Digital Network (ISDN); Freephone (FPH) supplementary service; Functional capabilities and information flows
STANDARD published on 15.3.1996
Designation standards: ETSI ETR 209-ed.1
Publication date standards: 15.3.1996
SKU: NS-311770
The number of pages: 57
Approximate weight : 171 g (0.38 lbs)
Country: European technical standard
Category: Technical standards ETSI
Latest update: 2025-07-21 (Number of items: 2 209 006)
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