ETSI ETR 251-ed.1

Public Switched Telephone Network (PSTN); Signalling System R2; Digital line signalling [CEPT Recommendation T/CS 42-03 E (1985)]

STANDARD published on 15.3.1996

English -
PDF - Immediate download (16.40 USD)

English -

Print design (16.40 USD)

The information about the standard:

Designation standards: ETSI ETR 251-ed.1
Publication date standards: 15.3.1996
The number of pages: 4
Approximate weight : 12 g (0.03 lbs)
Country: European technical standard
Category: Technical standards ETSI