Out-of-band signaling is a method of sending control information separately from the main data being transmitted. The control information manages or supports communication without being part of the main data stream.

It appears in several types of communication systems. The exact method depends on the network or technology being used.

Common Uses

• Sending control information in telecommunications.
• Managing telephone calls and connections.
• Signaling between network devices.
• Controlling communication sessions.
• Supporting network services that need separate control messages.

Related Terms: In-Band Signaling, Signaling, Control Channel, Data Channel, Telecommunications, Network Protocol, Control Information, Communication Channel, Signaling System, Network Communication

Related Entries

• Connectionless Protocol
• OSI
• Protocol Stack
• SNMP