NA 022
DKE German Commission for Electrical, Electronic & Information Technologies of DIN and VDE
Technical rule
[CURRENT]
ITU-T Q.645
ITU-T Q.645
Logic procedures for interworking of signalling system No. 5 to R2
Title (German)
Logische Prozeduren für das Zusammenwirken von Zeichengabesystem Nr.5 zu R2