In addition and subtraction operations, a mode in which the decimal marker is placed at a predetermined location with respect to the last digit entered.

A service feature that allows an additional party to be added to an established call without attendant assistance.
Note: A common implementation provides a progressive method that allows a call originator or a call receiver to add at least one additional party.

A multiplexing function offered in connection with SONET that allows lower level signals to be added or dropped from a high-speed optical carrier channel in a wire center. The connection to the add/drop multiplexer is via a channel to a central office port at a specific digital speed (i.e., DS3, DS1, etc. ). [NECA/FCC-5]

A bit delivered to the intended destination user in addition to intended user information bits and delivered overhead bits. Synonym extra bit.

Any block, or other delimited bit group, delivered to the intended destination user in addition to intended user information bits and delivered overhead bits. Synonym extra block.

1. A device whose output data are a representation of the sum of the numbers represented by its input data.
Note: An adder may be serial or parallel, digital or analog.
2. A device whose output data are a representation of the sum of the quantities represented by its input data.
Note: An adder can add things other than representations… (Read More →)

A device that acts as an adder or subtracter depending upon the control signal received; the adder-subtracter may be constructed so as to yield a sum and a difference at the same time.
Note: An arithmetic adder-subtracter yields arithmetic sums and differences, whereas a logical adder-subtracter yields logical sums and differences.

White noise

1. In communications, the coded representation of the source or destination of a message.
2. In data processing, a character or group of characters that identifies a register, a particular part of storage, or some other data source or destination.
3. To assign to a device or item of data a label to identify its location.
4. The part of… (Read More →)

The portion of a message that contains the source-user address and the destination-user addresses.
Note: In a communications network, the address field is usually contained within the message header portion of the message. A message usually consists of the message header, the user data, and a trailer.