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automatic call back (ACB)

Automatic Call Back (ACB) is a feature of telecommunications equipment for automatically interrupting an incoming connection and then setting up a connection

in the opposite direction. The Automatic Call Back feature

isavailable for modems and routers. The called modem terminates the connection

and then automatically re-establishes the connection to the calling modem. The ACB function is a security function to prevent unauthorized connections; on the other hand, it serves to charge the first called connection with the costs of data transmission.

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Englisch: automatic call back - ACB
Updated at: 11.03.2008
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