signaling, in-band

signaling, in-band
   A type of signaling using an AC signal (usually 2600 Hz) within the normal voice band. This signal can be transmitted from end to end of a long voice circuit without an intermediate signaling equipment. Since the signaling is audible, the signaling equipment must be arranged for tone-on-when-idle operation.

IT glossary of terms, acronyms and abbreviations. . 2015.

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