For a computer, a device that handles the transfer of data between internal memory and peripheral equipment.

A functional unit that controls one or more input-output channels. Synonym I/O controller.

A device that introduces data into or extracts data from a system.

The gain resulting from the insertion of a device in a transmission line, expressed as the ratio of the signal power delivered to that part of the line following the device to the signal power delivered to that same part before insertion.
Note 1: If the resulting number is less than unity, an "insertion loss" is indicated.
Note 2: Insertion… (Read More →)

1. The loss resulting from the insertion of a device in a transmission line, expressed as the reciprocal of the ratio of the signal power delivered to that part of the line following the device to the signal power delivered to that same part before insertion.
Note: Insertion loss is usually expressed in dB.
2. In an optical fiber system,… (Read More →)

Of a system or device, a plot of the amplitude as a function of frequency.
Note: The insertion-loss-vs. -frequency characteristic may be expressed as absolute gain or loss, or it may be normalized with respect to gain or loss at a specified reference frequency.

Synonym internal call.

1. All the cabling and equipment installed in a telecommunications facility, including the main distribution frame (MDF) and all the equipment extending inward therefrom, such as PABX or central office equipment, MDF protectors, and grounding systems.
2. In radio and radar systems, all communications-electronics (C-E) equipment that is installed in buildings.

See on-premises wiring.

A collection of produced units from which a statistically valid sample is to be drawn and inspected to determine conformance with acceptability criteria.
Note: The inspection lot may differ from a collection of units designated as a lot for other purposes, such as for production, storage, packaging, and shipment.