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`Page 1
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`CommScope Ex. 1037
`
`

`

`_ This book and other books may be purchased ata discount
`from the publisher when ordered in bulk quantities. Contact:
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`© 2001 by the Institute of Electrical and Electronics Engineers, Inc.
`3 Park Avenue, 17th Floor, New York, NY 10016-5997.
`
`All rights reserved. No partof this book may be reproduced in any form,
`nor may it be stored in a retrieval system or transmitted in any form,
`without written permission from the publisher.
`
`Printed in the United States of America.
`
`10
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`1
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`ISBN 0-7803-6020-6
`IEEE Order No. PC5869
`
`Library of Congress Cataloging-in-Publication Data
`
`Hargrave, Frank.
`Hargrave’s communications dictionary.
`/ Frank Hargrave.
`.
`cm.
`
`Includes index.
`ISBN 0-7803-6020-6
`1, Telecommunication——Dictionaries.
`TK5102.H37 2000
`621.382'03—de21
`
`I. Title.
`
`00-061416
`
`Page 2
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`CommScope Ex. 10
`
`

`

`threshold
`
`527
`
`One
`
`threshold (1) That point of a transfer function where a changein the
`input causes an abrupt change in the output. See also hysteresis and
`Schmitt trigger. (2) In network management. Anattribute value that
`is used as a cutoff point between significant (or critical) and non-
`significant events. (3) The smallest value of a parameter that can be
`detected or causes a specified action by a particular device. For ex-
`ample, the smallest value an analog-to-digital converter can discern,
`(4) The minimum value a stimulus may have to create a desired ef-
`fect, e.g., the minimum currentnecessary for a laser diode to produce
`coherent emission. (5) A value used to denote predeterminedlevels.
`For example:
`¢ The levels in a UART (Universal asynchronousreceiver transmit-
`ter) transmit or receive buffer.
`* Those pertaining to volume of message storage, i.e., in-transit
`storage or queue storage, used in a message-switching center.
`
`ticker A receive only telex machine typically used to report stock and
`commodity prices. Information is printed on a one-inch-wide paper —
`tape.
`
`TID (1) An abbreviation of Transaction ID. (2) An abbreviation of
`Traveling Jonospheric Disturbance.
`
`TIDF An abbreviation of Trunk Intermediate Distribution Frame.
`
`TIDS An acronym for Technical Information Distribution Service.
`
`TIE (1) An acronym for Time Interval Error. (2) An acronym for
`Trusted Information Environment—an encoding method.
`(3) An
`acronym for Terminal Interface Equipment.
`
`tie line (1) TIE is an acronym for Terminal Interface Equipment. A
`TIE line is a long-distance line leased from a communicationscarrier
`for private, nonswitched use. The TIE line may be a single voice grade
`threshold current (1) Inalaser, the driving current corresponding to
`line or may have the capacity of a T-1 or greater link. TIE lines are fre-
`lasing threshold. Currents below this threshold may cause emission;
`quently used to connect two or more buildings,facilities, or private
`however, it will not be coherent. (2) Of a fuse. The current at which
`branch exchanges (PBXs) of an organization. Also called a tie trunk.
`the device becomes currentlimiting, that is, it becomes an opencir-
`(2) A transmission line connecting two or more power systems.
`cuit in a specified period oftime.
`threshold extension See FM threshold extension.
`
`tie trunk A dedicated telephone line or channel directly connecting
`twoprivate branch exchanges (PBXs). See also fie line.
`
`threshold frequency In opto-electronics, the frequency of incident
`radiant energy below whichthere is no photoemissive effect.
`
`threshold signal to interference (TSD ratio The minimum signalto
`interference powerrequired by a circuit, device, or system to provide
`a specified performancelevel.
`
`through group A group of 12 voice-frequency channels transmitted
`as a unit through a carrier system.
`
`through supergroup An aggregate of 60 voice-frequency channels
`(five groups) transmitted as a unit through a carrier system.
`
`throughput (1) The average transfer rate of actual, error-free, useful
`information (not including overhead,error bits, or retransmitted bits)
`through a device or series of devices. See also transferrate of infor-
`mationbits (TRIB). (2) The maximum capacity of a communications
`channel or system. (3) A measure of the numberof tasks performed
`by a system overa period of time.
`
`THT Anabbreviation of Token Holding Time.
`THz The SI symbolfor terahertz (10'? Hz).
`TI (4) An abbreviation of Time In. (2) An abbreviation ofTexas In-
`struments Inc.
`(3) An abbreviation of Terminal Interface.
`
`TIA (4) An acronym for Telecommunications Industry Association.
`A trade group representing about 600 manufacturers, A key player in
`setting telecommunications standards both in the United States and
`abroad. (2) An acronym for Thanks In Advance. (3) An acronym for
`The Internet Adapter. (4) An acronym for Telematic Internetworking
`Application.
`
`TIA/EIA IS-n See [S-n.
`i
`
`TIC (1) An acronym for Tongue In Cheek. (2) An acronym for Token
`ring Interface Coupler. (3) An acronym for Terminal Identification
`Code.
`
`TICS An acronym for Telecommunication Information Control Sys-
`tem.
`
`tick tone A signal generated by some auto dialers and private auto-
`matic branch exchanges (PABXs)that indicates digits are being out-
`pulsed to the local exchange.
`
`TIES An acronym for Time Independent Escape Sequence. TIES is
`an escape sequence, which is not the same as the escape sequence
`with guard time (patented by Hayes Computer products) that is now
`used as the de facto standardforreliable modem operation by modem
`manufacturers worldwide. A modem supporting only TIES will re-
`spond to the escape sequence with guard time but will also escape
`into command mode if the chosen escape sequence is embedded in
`the data being transmitted.
`,
`
`-TIF A graphicsfile adhering to the Tagged Image File Format. See
`also TIFF.
`
`TIF (1) An acronym for Telecommunications Interference Filter.
`(2) An acronym for Telephone Influence (or Interference) Factor.
`
`TIFF An acronym for Tagged Image File Format. The standard was
`developed by Microsoft, Aldus, and major scanning hardware ven-
`dors as a means to capture andtransfer images into publishing appli-
`cations. There are several image types supportedin the standard, that
`is,
`
`¢ Black and white,
`¢ Halftone or dithered, and
`* Grayscale.
`
`tight buffer In fiber optic cabling, a protective layer that is extruded
`over the cladding to keep the fiber from moving around or bending
`too sharply. Tight buffers are commonly used in patch cords and
`other areas where the cable is likely to be “carelessly” moved.
`
`time (1) Theinterval between two events, or the duration of an event.
`(2) An apparently irreversible continuum of ordered events. (3) The
`designation of an instant on a selected time scale, for example.
`* Local Apparent Time (LAT )—anearly timekeeping scheme based
`on the Sun’s crossing the meridian, that is, when the Sun is due
`south (for positions in northern temperate latitudes), the time is
`12:00 noon.(For positions in the southern temperatelatitudes, the
`Sun will be due north, and for regions between theselatitudes, the
`Sun maybedue north orsouth depending on the season.) Because
`of the Earth’s elliptical orbit and its tilted axis, the time scale is
`not linear. In fact, it can be off as much as 16 minutes in some sea-
`sons. Another problem is caused by the fact that the Earth is
`
`Page 3
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`CommScope Ex. 1037
`
`