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Advanced Mobile Phone Service (AMPS) is a first-generation analog, circuit-switched cellular phone network. Originally operating in the 800 MHz band, service was later expanded to include transmissions in the 1900 MHz band, the VHF range in which most wireless carriers operate. Because AMPS uses analog signals, it cannot transmit digital signals and cannot transport data packets without assistance from newer technologies such as TDMA and CDMA.
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Monday, May 12, 2008
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Basic Rate Interface. ISDN interface composed of two B channels and one D channel for circuit-switched communication of voice, video, and data. Compare with PRI.
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Saturday, May 10, 2008
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Boot Programmable Read-Only Memory. Chip mounted on a printed circuit board used to provide executable boot instructions to a computer device.
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Saturday, May 10, 2008
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In a switching system, a condition in which no paths are available to complete a circuit. The term is also used to describe a situation in which one activity cannot begin until another has been completed.
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Saturday, May 10, 2008
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Priority assigned to each origination port in circuit-switched systems. This priority defines the order in which calls are reconnected. Call priority also defines which calls can or cannot be placed during a bandwidth reservation.
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Saturday, May 10, 2008
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Electrical characteristic denoting a circuit with both negative and positive polarity. Contrast with unipolar.
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Saturday, May 10, 2008
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circuit emulation access card.T1 or E1 circuit emulation card in the LightStream 2020 ATM switch.
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Saturday, May 10, 2008
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The average rate, in kilobits per second (kbps), at which a given virtual circuit will transmit.
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Saturday, May 10, 2008
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The physical link (such as wire or a telephone circuit) that connects one or more devices to one or more other devices.
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Saturday, May 10, 2008
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1) Clear To Send. Circuit in the EIA/TIA-232 specification thatis activated when DCE is ready to accept data from DTE. 2) Common transport semantic. Cornerstone of the IBM strategy to reduce the number of protocols on networks. CTS provides a single API for developers of network software and enables applications to run over APPN, OSI, or TCP/IP.
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Saturday, May 10, 2008
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