TeleCom Glossary

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Glossary: A
A and Z direction For a two-point circuit, one end is A and the other end is Z. For a multipoint circuit, the master station is A and the remote stations or terminals are Z.
AAL ATM Adaptation Layer
ABR Available Bit Rate
Acceptance mask A collection of thresholds assigned to circuit performance parameters. When used during circuit testing, it automatically reports whether a particular performance parameter has failed.
ACNA Access Carrier Name Abbreviation
Action set A set of instructions used to control the parsing of responses or variables in a dialog.
Add-drop multiplexer (ADM) A SONET multiplexer capable of extracting or inserting lower-rate signals from a higher-rate multiplexed signal without completely demultiplexing the signal
ADSL Asymmetric Digital Subscriber Line
Advanced Intelligent Network (AIN) A telecommunications network in which complex call processing, routing, and network management are provided by means of centralized database at a few points, rather than from a speed signaling network carrying information on call setup to an individual switch
AF Autoframed. See Autoframe.
AID Access Identifier
AIS See Alarm Indication Signal
Alarm Indication Signal (AIS) An unframed All Ones signal that replaces the normal traffic signal when a maintenance alarm indication has been activated. Also called a blue alarm.
AIS-CI Alarm Indication Signal–Customer Installation. See Alarm Indication Signal.
AIX®
Advanced Interactive Executive (AIX) The computer operating system for several Hekimian systems, including REACT 2001™, REACT 2000, and PM Integrator™.
All ones code A signal stream containing 15,360 or less zeros in one second. When a device loses synchronization, it sends an all ones code to keep the network up. It also sends this code to tell the network there is a transmission problem.
Alternate mark inversion (AMI) A line-coding format for T1 lines where successive marks alternate between positive and negative polarity. The marks are equal in amplitude. A space designates zero amplitude.
American Standard Code for Information Interchange (ASCII) A code with seven information signals plus one parity check signal. It is useful for interworking between computers.
AMOS Access Mechanized Order System
Analog In communications, transmission employing variable and continuous waveforms to represent information values.
Analog signal A nominally continuous electrical signal that varies in amplitude or frequency
ANSI American National Standards Institute
AOR Area of Responsibility
API Applications Programming Interface
Asynchronous error measurement A measurement that detects error events referenced by the system's time clock.
Asynchronous transfer mode (ATM) A transmission mode in which information is organized in cells (packets). It is asynchronous in the sense that the recurrence of cells depends upon the required or instantaneous bit rate.
Asynchronous transmission Transmission in which time intervals between transmitted characters may be of unequal length. Transmission is controlled by start and stop bits at the beginning and end of each character.
ATAF ATM Test Access Function
Attenuation Amount of signal loss in a transmission. Usually measured in decibels. High attenuation can be caused by poor connections, defective connector hardware, excessively long lines, or ambient temperatures
Attribute An occurrence that can be detected and reported by Hekimian's 3246 T1 Line Performance Monitor (TLPM) or 3248 T1 Service Performance Monitor (TSPM).
ATU-C ADSL Transmission Unit-Central
ATU-R ADSL Transmission Unit-Remote
Autoframe A process which determines the framing on the digital circuit and reports the framing format.
AWS ADSL Workstation
AXP Alpha Processor
 

 

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Telephone I & R Telephone I & R
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OSP Tester, Fault Loc... OSP Tester, Fault Loc...
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ISDN ISDN
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SS7 SS7
DDS DDS
Internetworking ATM Internetworking ATM
DWDM/Routing DWDM/Routing
DMS10 DMS10
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MetroE Field-Tech MetroE Field-Tech
T1 & T3 T1 & T3
T1T3 for CATV T1T3 for CATV
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LTE Core LTE Core
LTE Air Interface LTE Air Interface
LTE and 4G LTE and 4G
LTE Charging Mgmt and Apps LTE Charging Mgmt and Apps
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Carrier Wireless Carrier Wireless
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Ladder Safety and Fall Protect Ladder Safety and Fall Protect
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Digital TV Crossover Digital TV Crossover
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