"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.
A network control method in which the signaling functions associated with establishing and terminating a telephone call are on facilities (the common signaling channels) separate from the facilities actually carrying the call. CCS provides faster call set-up and release, and increases the efficiency of call-carrying facilities, thus allowing the network to carry additional calls.
A method of signaling in which signaling information relating to a multiplicity of circuits, or function or for network management, is conveyed over a single channel by addressed messages. Signaling systems being used and installed in many telephone networks. CCS completely separates signaling information from user data by sending it over separate signaling network.
CCS is a signaling system which was developed for use between a stored program control digital switching system (in which all the signaling information for one or more of the trunk groups is transmitted over a signaling channel that is dedicated) usually, but not always the case, this is done completely separate from the user traffic bearing facilities.
A signaling method that sends data packets of signaling information for a group of associated transmission channels over a separate link. This separate link is usually another channel of the same digital trunk, called the D (for data) channel in ISDN service. CCS sends signaling data only when one or more channels in the designated group experiences a state change. See also B channel, CAS, D channel.
In telephony, Common Channel Signalling (CCS) or in the US Common Channel Interoffice Signalling (CCIS) is the transmission of signaling information (control information) on a separate channel to the data.