In-Band Signaling

In telecommunications, in-band signaling is the sending of control information within the same band or channel used for voice or video. This is in contrast to out-of-band signaling which is sent over a different channel, or even over a separate network. In-band signals may often be heard by telephony participants, while out-of-band signals are inaccessible to the user.

Courtesy of Wikipedia

Cumberland Computer Services., LLC
205-467-4055
https://cumberlandcomputerservices.com/