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Private Telecommunication Network (PTN); Inter-exchange signalling protocol; Diversion supplementary services
STANDARD published on 29.11.1993
Designation standards: ETSI ETS 300257-ed.1
Publication date standards: 29.11.1993
SKU: NS-312407
The number of pages: 66
Approximate weight : 198 g (0.44 lbs)
Country: European technical standard
Category: Technical standards ETSI
Latest update: 2024-09-12 (Number of items: 2 346 316)
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