(n) one who runs a red light or stop sign
(n) (comp) signal degradation
(n) (comp) selection signal
(n) distress signal
SOS
(n) stop signal
stoplight
(n) electrical signal
(n) synchronous idle
SYN
(n) incoming signal
input signal
(n) (comp) optional
(n) alarm
(n) (comp) mandatory
(n) time signal
(n) fog signal
(n) (comp) inhibiting signal
(n) (comp) jam signal
(n) (comp) television signal
(n) (comp) common channel signalling
(n) (comp) signal label
(n) (comp) signalling link
(n) (comp) signal-to-noise ratio
(n) (comp) analog signal
(n) (comp) clock signal
clock pulse
(n) (comp) start signal
(n) (comp) stop signal
(n) (comp) digital signal
(n) break signal
(n) (comp) interrupt signal
(n) (comp) common channel signalling network
(n) (comp) entity end (signal)
(n) (comp) signalling channel