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Common channel signaling is a form of out-of-band signaling where a separate, dedicated channel is used for the exchange of signaling information for multiple traffic channels. Example: ISDN's D channel used for control and signaling purposes.

Circuit switching signaling is used to establish a dedicated channel or circuit between two parties for the duration of a session. Example: The establishment of a traditional telephone call utilizing a dedicated physical line.

In-band signaling involves the transmission of control information within the same band or channel as the main data. Example: DTMF tones used in telephone networks to indicate the dialed numbers.

Out-of-band signaling refers to the sending of control signals on a separate channel from the data traffic. Example: SS7 protocol used in public switched telephone networks to set up and manage phone calls.