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| Prestige 782R G.SHDSL Router |
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| more specific kinds of Server programs and each Server requires a specific kind of |
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| Client. A Web Browser, for example, is a specific kind of Client. |
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| CO |
| Central Office. A CO is a facility that serves local telephone subscribers. In the CO, |
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| subscribers' lines are joined to switching equipment that allows them to connect to |
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| each other for both local and long distance calls. |
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| COE |
| Central Office Equipment. A central office is where home and office phone lines |
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| terminate and connect to a much larger switching system. |
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| CPE |
| Customer Premise Equipment is |
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| organization’s site that is attached to the telecommunication network. CPE equipment |
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| includes routers, modems, PBXs, telephones, key systems, facsimile products, voice |
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| processing equipment and video communication equipment. |
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| Crossover |
| A cable that wires a pin to its opposite pin, for example, RX+ is wired to TX+. This |
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| Ethernet Cable |
| cable connects two similar devices, for example, two data terminal equipment (DTE) or |
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| data communications equipment (DCE) devices. |
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| Crosstalk |
| Crosstalk is noise emanating from the signals transmitted on adjacent wire pairs. |
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| Crosstalk is caused by electric or magnetic fields of one telecommunication signal |
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| affecting the signal in an adjacent circuit. In a telephone circuit, crosstalk can result in |
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| you hearing part of a voice conversation from another circuit. The phenomenon that |
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| causes crosstalk is called Electro Magnetic Interference (EMI). It can occur in |
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| microcircuits within computers and audio equipment as well as within network circuits. |
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| CSU/DSU |
| Channel Service Unit/Data Service Unit. CSUs and DSUs are actually two separate |
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| devices, but they are used in conjunction and often combined into the same box. |
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| These devices are part of the hardware you need to connect computer equipment to |
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| digital transmission lines. The CSU device connects with the digital communication line |
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| and provides a termination for the digital signal. The DSU device, sometimes called a |
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| digital service unit, is the hardware component you need to transmit digital data over |
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| the hardware channel. This device converts signals from bridges, routers and |
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| multiplexors into the bipolar digital signals used by the digital lines. Multiplexors mix |
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| voice signals and data on the same line. |
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| DCE |
| Data Communications Equipment is typically a modem or other type of communication |
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| device. The DCE sits between the DTE (data terminal equipment) and a transmission |
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| circuit such as a phone line. |
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| Device Filters |
| Your Prestige uses Device Filters to decide whether or not to allow passage of a data |
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| packet and/or to make a call. Device filters act on raw data from/to LAN and WAN, |
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| serve as a limited firewall to your Prestige and may be configured as Device Filter |
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| Rules via the SMT. |
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| DHCP |
| Dynamic Host Configuration Protocol automatically assigns IP addresses to clients |
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| when they log on. DHCP centralizes IP address management on central computers |
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| that run the DHCP server program. DHCP leases addresses for a period of time which |
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Glossary | C |