Glossary:

ATIS Telecom Glossary

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attenuation-limited operation

The condition that prevails when attenuation, rather than bandwidth, limits the performance of a communications link.

attenuator

1. In electrical systems, a network that reduces the amplitude of a signal without appreciably distorting its waveform.
Note 1: Electrical attenuators are usually passive devices.
Note 2: The degree of attenuation may be fixed, continuously adjustable, or incrementally adjustable. Fixed attenuators are often called pads, especially in telephony.
Note 3: The input and output impedances of an attenuator are… (Read More →)

attribute

1. In database management, a property inherent in an entity or associated with that entity for database purposes.
2. In network management, a property of a managed object that has a value.
Note 1: Mandatory initial values for attributes can be specified as part of the managed object class definition.
Note 2: Attributes may be either mandatory or conditional.

attribute authority

1. In computer security, an entity that is trusted by at least two entities to create and assign attribute certificates. [After X9.45]
2. An authority recognized in a security domain as a trusted source of attributes for entities within the domain. (See also Subject Authority) [ECMA138].

attribute certificate

A set of attributes and a public key certificate identifier that are made unforgeable by use of the digital signature created with a private key. [After X9.30]

ATU-C

ADSL Transmission Unit, Central Office

ATU-I

ADSL Transmission Unit, Intermediate

ATU-R

ADSL Transmission Unit, Remote

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