ETSI ETR 254
- Public Switched Telephone Network (PSTN); Signalling System R2; Signalling and circuit supervision via the European Communications Satellite (ECS) [CEPT Recommendation T/CS 42-09 E (1985)]
- standard by European Telecommunications Standards Institute, 03/01/1996
- Publisher: ETSI
$7.00$14.00
Related Products
ETSI ETS 300 805-1
Private Integrated Services Network (PISN); Inter-exchange signalling protocol; Circuit mode basic s..
$34.00 $68.00
ETSI ETS 300 188-3
Integrated Services Digital Network (ISDN); Three-Party (3PTY) supplementary service; Digital Subscr..
$11.00 $21.51
ETSI EN 300 196-1
Integrated Services Digital Network (ISDN); Generic functional protocol for the support of supplemen..
$39.00 $78.50
ETSI I-ETS 300 490-2
Terminal Equipment (TE); File transfer over the Integrated Services Digital Network (ISDN); Conforma..
$9.00 $17.50