re Sha
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`For Reference
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`Not to be taken from this room
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`Telecom Dictionary
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`Published By:
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`AlthosPublishing
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`DISCARDED FR
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`BOB JONES UNIVERSELae
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`REF
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`ALTHos /
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`Althos
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`contained in this book.
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`Furthermore, this manual contains information ontelecommunications
`accurate only up to the printing date. The purposeof this manual to edu-
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`2
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`

`

`mobile radio system, the control channel sends messages
`that include paging (alerting), access control (channel
`assignment) and system broadcast information (access
`parameters and system identification).
`Control Channels-An allocation offrequencies in a com-
`munication system (suchasa cellular telephone network)
`that are used to convey control information rather than
`voice traffic.
`Control Character-A character in a computer program
`whose occurrence in a particular context initiates, modi-
`fies, or stops an action that affects the recording, process-
`ing, or interpretation of data.
`Control Keys-Keys on a computer keyboard that, when
`pressed simultaneously,
`invoke control
`functions,
`for
`example, the use of “Control-D” to terminate a computer
`work session. One of the keys generally is marked Control
`or CTRL,andthe other is an alphabetic character.
`Control Mobile Attenuation Code (CMAC)-Usedin a
`message sent to the mobile from the base which assigns
`the mobile to an absolute (specified) powerlevel. This is
`important in small diameter cells where the mobile must
`access the system at a low powerlevelto prevent co-chan-
`nel interfering with other control channels.
`Control Office-An exchange carrier center or office
`responsible for the installation and maintenance of a
`given access service furnished to an access customer.
`Control Packet-A packet of data that is sent in a com-
`munication system that is used to control the transmis-
`sion (link layer) or higher- level communicationlayer.
`Control Panel-A control panel
`is an interface that
`allows users to enter operational commandsto a device or
`system.
`Control Plane-A control planeis the portions of a net-
`work system thatare involved in the setup, management
`and termination of communication sessions andservices.
`Control Station-A control station a fixed radio trans-
`ceiver whose transmissionsare usedto automatically con-
`trol the operation of anotherradio transceiverat another
`location.
`Control Transmitter-A control transmitter is a fixed
`radio transmitter that is used to transmit control signals
`to one or moreotherradio stations for the purpose of con-
`trolling their operation and interaction with users (sub-
`scribers).
`Control Unit-A part of the microprocessor whose func-
`tion is to read and decodeinstructions from the memory.
`Controlled Environmental Vault (CEV)-A controlled
`environmental vault (CEV) is an underground room that
`is used to contain electronic and/or optical equipment
`under controlled thermal and humidity conditions.
`Controlled Load Service-Controlled-load service pro-
`vides a variable bandwidth for each communicationses-
`sion that varies based on factors including the amountof
`network activity (e.g. heavy traffic) and quality of service
`requirements (e.g. real-time compared to non-real time
`communication application).
`Controlled Rerouting-In the Signaling System 7 proto-
`col, the controlled transfer of signaling traffic from an
`
`ConvergentBilling
`
`alternative signaling route to the normalsignaling route,
`when it becomesavailable.
`Controller/Sequencer-An electronic assembly that
`receives and executes instructions from memory to allow
`the coordination of other electronic assemblies or process-
`ing communications data flow.
`Controlling RNC (CRNC)-The controlling RNC is
`responsible for the load and congestion control of its own
`cell, and also executes the admission control and code
`allocation for new radio links to be established in those
`cells.
`Convention-A generally acceptable symbol, sign, or
`practice in a given industry.
`Conventional Radio System-Conventional radio sys-
`tems allow communication on a dedicated radio channel
`between two or more mobile radios. Traditionally, con-
`ventional (two-way) radio systems have served public
`safety and industrial applications. These systems typical-
`ly only allow push-to-talk service (one-way at a time) to
`allow sharingof a single radio channels frequency.
`ConvergenceBilling-An all inclusivebill that combines
`chargesfor: local, long distance, data, Internet, andpos-
`sibly utilities (water, gas, electric) and cable TV.
`Convergentbilling generally implies one all-encompass-
`ing view of the Customerforall subscribed services, and
`a unified view of the product portfolio to enable cross-
`product packages.
`Convergence Layer-A convergencelayeris a functional
`process within a communication device or system that
`adapts one or more transmission mediums(such as radio
`packetorcircuit data transmission) to one or more alter-
`native transmission formats (such as ATM or IP data
`transmission).
`Convergence Sublayer (CS)-A convergence sublayeris
`a functional process within a communication device or
`system that adapts one or more transmission mediums
`(such as radio packet or circuit data transmission) to one
`or more alternative transmission formats (such as ATM
`or IP data transmission). The use of a convergence sub-
`layer in a communication system typically allows for the
`transparent flow of commands and media regardless of
`the media and type of transmission systems.
`Convergence Time-The amountof timeit takes an echo
`canceller to train (learn) how to cancel echoes from the
`incoming audiosignal.
`Convergent-A process of integrating services such as
`local
`telephone service, mobile communications, cable
`television, and long distance together onto a single sys-
`tem. These services and/or systems may betruly inte-
`grated or loosely tied together (sometimes called “sta-
`pled”) so allow a customerto have a single billing and cus-
`tomer care access point.
`ConvergentBilling-Convergentbilling is the combining
`of billing information for multiple types of services such
`as television, telephone service and data communication
`services, Convergent billing or systems may be tightly
`integratedorloosely tied together (sometimescalled “sta-
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