Definitions for "Common Channel Signaling"
Keywords:  ccs, trunk, isdn, interoffice, ccis
"A signaling method in which a single channel conveys
A form of signaling in which the signaling for all of the affected circuits is carried over a separate common circuit. An example of common channel signaling in both T-1 and E-1 transmission is the D channel used in PRI ISDN signaling. (source)
A signaling method where signaling information is provided for a number of channels in data-packet form sent over a separate link. This separate link is usually another channel of the same digital trunk, called a D channel in ISDN service.