Unlike data transfer and PBX applications (which are out of band), where digits you dial and the ringing are carried within the channel you talk on (like your home hone line).
The transmission of control information in the same 4kHz channel used for voice transmission.
Control signals embedded in a media stream rather than in a dedicated control channel.
Signaling made up of tones or defined bits which pass within the data transmission stream. Tones sent over digital circuits are encoded into digital PCM bursts and sent as digital data within the data channel.
In an analog telephony circuit, in-band refers to signaling that occupies the same transmission path and frequency band used to transmit voice tones. In digital telephony, "in-band" has come to mean signaling that is transmitted within an 8-bit voice sample or time slot, as in T-1 "robbed-bit" signaling.
The transmission of signaling information over the same path as data and/or voice information. Another term for in-band signaling is robbed-bit signaling. Robbed-bit refers to the 8 kbps of each channel used for signaling. T1 access lines containing one or more switched channels, and switched-56 lines use in-band signaling.
(1) In an analog telephony circuit, in-band refers to signaling that occupies the same transmission path and frequency band used to transmit voice tones. (2) In digital telephony, "in-band" means signaling transmitted within an 8-bit voice sample or time slot, as in T-1 "robbed-bit" signaling. (3) On the Dialogic PCM Expansion Bus (PEB), signaling is considered "in-band" only if it occupies the same transmission path and frequency band used to transmit voice data.
A signaling method in which information is carried as audio signals that are transmitted in the voice band. Touchtone dialing is a familiar example. See also out-of-band signaling.
The transmission of signaling information at some frequency or frequencies that lie within a carrier channel normally used for information transmission.
In telecommunications, in-band signaling is the sending of metadata and control information in the same band, on the same channel, as used for data.
