Glossary:

ATIS Telecom Glossary

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ACK

1. acknowledge character.
2. acknowledge.

acknowledge character (ACK)

A transmission control character transmitted by the receiving station as an affirmative response to the sending station.
Note: An acknowledge character may also be used as an accuracy control character.
See also ACK.

acknowledgement

1. A response sent by a receiver to indicate successful receipt of a transmission.
Note: An example of an acknowledgement is a protocol data unit, or element thereof, between peer entities, to indicate the status of data units that have been successfully received.
2. A message from the addressee informing the originator that the originator's communication has been received and… (Read More →)

ACN

Architecture for Control Networks

ACNA Code

Access Carrier Name Abbreviation

See Interexchange Access Customer (IAC Code)

acoustic coupler

1. An interface device for coupling electrical signals by acoustical means--usually into and out of a telephone instrument.
2. A terminal device used to link data terminals and radio sets with the telephone network.
Note: The link is achieved through acoustic (sound) signals rather than through direct electrical connection.

acoustic delay line

A device that introduces a delay in the propagation of an electrical signal by (a) employing a transducer to convert the signal into an acoustic wave, (b) propagating the acoustic wave through a medium such as a column of mercury or a carbon or ferrite rod, and (c) by means of another transducer, converting the acoustic wave back to an… (Read More →)

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