What is CCS (Common Channel Signaling)?

Common channel signaling (CCS) is signaling in which a group of voice-and-data channels share a separate channel that is used only for control signals. This arrangement is an alternative to channel associated signaling (CAS), in which control signals, such as those for synchronizing and bounding frames, are carried in the same channels as voice and data signals.The signaling channel usually controls multiple message channels. CCS offers Faster call set-up time and Can transfer additional information along with the signaling traffic.