Zeichengabesystem-Nr.7
commun.	signalling system No.7 (ITU-T (CCITT) Rec. Q.701-764, FTZ RL 1R7)
Zeichengabesystem Nr.7
el.	common channel signaling 7; common channel signalling 7
Zeichengabesystem Nr. 7
commun.	Signalling System No 7