Glossaries

• Local Area Network (LAN)
• High speed local area network for a small geographic area such as a school, business, or office. Ethernet is a widely used technology with LANs. Compare with WAN, wide area network.
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• Lambda (λ)
• Lambda is the name given to the wavelength for CWDM or DWDM transmission. We will also say that a CWDM or DWDM wavelength is a colored wavelength.
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• Label Edge Router (LER)/Label Switching Router (LSR)
• The Label Edge Router (LER) is referring to the two Edge Routers of a circuit while the Label Switch Router is referring to the intermediate nodes performing Label Switching along the LSP.
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• Label Switching Path (LSP)
• The label pretended to the packet of multiple protocols and to give the information of the Switching Path. Then Multi-Protocol-Routers in MPLS infrastructure will switch the packet very rapidly in the infrastructure.
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• Link Access Procedure (LAP)
• Data link layer protocols for framing and transmitting data from point-to-point links.
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• Line Build Out (LBO)
• A compact network that simulates a length of transmission line.
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• Liquid Crystal Display (LCD)
• A display technology that uses liquid crystals sealed between two plates of glass. Common nowadays in computer monitors, fax machines, calculators, TVs, clocks, and many other electronic displays.
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• Link Control Protocol (LCP)
• Part of PPP, Point to Point Protocol. Establishes, tests, and configures data-link connections for further use by PPP.
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• Light Emitting Diode (LED)
• Semiconductor device that emits light from electrical energy. Considerably more efficient than incandescent light-bulbs, LEDs are often used as indicator lights in computer hardware.
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• Load Number (LN)
• A measure of how much work a computer is performing. An idle computer has a load number of 0 and each process that is running or waiting to run increments the load number by 1. It is typically measures the performance in the last one, five, and fifteen minute periods.
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• Loss of Frame (LOF)
• A generic term to designate an error in a packet-switched network. Typically indicates the device is over capacity or misconfigured.
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• Loss of Frame Count (LOFC)
• The number of seconds during which a Loss of Frame alarm condition was detected.
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• Loss of Frame Sync (LOFS)
• Occurs when errors in the Digital Signal Level 3 (DS3) framing pattern are detected by the UXM backcard receiver. This error represents consecutive errors in the terminal framing bits.
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• Loss of Multi-frame (LOM)
• Occurs when two consecutive multi-frame alignment signals have generated an error in a T1/E1 system.
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• Line of Sight (LOS)
• The fact that there must be an clear, unobstructed path between transmitters and receivers in a wireless communications system.
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• Loss of Signal (LOS)
• Occurs when N consecutive zeros are detected on an incoming signal, where N is defined by the device or user.
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• Loss of Synchronization Word Second (LOSWS)
• Whether an alarm was sent due to a Loss of Synchronization Word failure during the last second.
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• Line Power
• General purpose alternating current electric power from the wall. Can also refer to any general source of power.
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• Low Voltage Differential Signal (LVDS)
• An electrical digital signaling standard that can run at very high speeds over inexpensive twisted pair copper cables. Specifies the interoperability between the input and output connection points on integrated circuits. Is differential in that it transmits data as the voltage difference between two electrical wires.
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