Glossary
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Cable pulling lubricant |
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Cable rearrangement facility (CRF) | A special splice cabinet used to vertically organize cables so that they can be spliced easier.
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Cable sheath | A covering over the core assembly that may include one or more metallic members, strength members, or jackets.
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Cable tray |
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Cabling map | A map of how cabling is run through a building network
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Campus | The buildings and grounds of a complex, such as a university, college, industrial park, or military establishment.
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Campus backbone | Cabling between buildings that share data and telecommunications facilities.
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Campus distributor (CD) | The ISO/IEC 11801 term for the main cross-connect; this is the distributor from which the campus backbone cable emanates.
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Capacitance | The ability of a dielectric material between conductors to store electricity when a difference of potential exists between the conductors. The unit of measurement is the farad, which is the capacitance value that will store a charge of a one coulomb when a one-volt potential difference exists between the conductors. In AC, one farad is the capacitance value, which will permit one ampere of current when the voltage across the capacitor changes at a rate of one volt per second.
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Carrier | An electrical signal of a set frequency that can be modulated in order to carry voice, video, and/or data.
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Carrier detect (CD) | Equipment or a circuit that detects the presence of a carrier signal on a digital or analog network.
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Carrier sense |
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Carrier Sense Multiple Access/Collision Avoidance | A network media access method that sends a request to send (RTS) packet and waits to receive a clear to send (CTS) packet before sending. Once the CTS is received, the sender sends the packet of information. This method is in contrast to CSMA/CD, which merely checks to see if any other stations are currently using the media.
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Carrier Sense Multiple Access/Collision Detect (CSMA/CD) | A network media access method employed by Ethernet. CSMA/CD network stations listen for traffic before transmitting. If two stations transmit simultaneously, a collision is detected and each station waits a brief (and random) amount of time before attempting to transmit again.
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Category 1 | Also called CAT-1. Unshielded twisted pair used for transmission of audio frequencies up to 1MHz. Used as speaker wire, doorbell wire, alarm cable, etc. Category 1 cable is not suitable for networking applications or digital voice applications. See Chapter 1 for more information. Not a recognized media by ANSI/TIA-568-C.
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