Public Switched Telephone Network (PSTN); Signalling System R2; Signalling tests via the European Communications Satellite (ECS) [CEPT Recommendation T/CS 42-05 E (1985)]
STANDARD published on 15.3.1996
Designation standards: ETSI ETR 253-ed.1
Publication date standards: 15.3.1996
The number of pages: 8
Approximate weight : 24 g (0.05 lbs)
Country: European technical standard
Category: Technical standards ETSI