|Kbps - Kilobits per second.
A measurement for the speed of data transmission.
kHz - Kilohertz.
Key System - CPE that provides line sharing capabilities to the user. Typical key systems share a few lines among many phones.
Kilobit - One thousand bits.
Kilobyte - A measure of computer memory or storage.
LAN - Local Area Network. A network that connects computers, modems, and printers within a limited area such as a school or office.
LANE Local Area Network Emulation. ATM devices communicate by emulating a LAN.
Last-Mile Technology - Any telecommunications technology, such as wireless radio, that carries signals from the broad telecommunication infrastructure along the relatively short distance (hence, the "last mile") to and from the home or business.
LATA - Local Access and Transport Area. A local geographical area that was originally established to define the area in which a local telephone company may offer telecommunications services.
Latency - The delay between the time a device receives a frame and the frame is forwarded out of the destination port.
LD-CELP - Low-Delay Code Excited Linear Prediction.
Leased line - A telecommunication facility or link reserved for the exclusive use of one customer. Also called a dedicated line.
Leased service - The exclusive use of any channel or combination of channels designated to a subscriber.
Loading coil - Equipment used to increase resistance to electrical current and balance attenuation of high and low frequency signals in the voiceband.
Local loop - In telephony the wire pair that connects a subscriber to a phone company end office, typically containing two wires. Four-wire local loops are common, however, especially with leased voice grade circuits.
Loopback - A diagnostic procedure where data is sent to the device being tested, and the output of the device is fed directly back to its input, looped around, and the returning data is checked against that which was sent.
Loopback test - A test typically run on a 4-wire circuit. Two transmit leads are joined to the two receive leads. A signal is then sent around the loop. Measuring differences between the sent and received signal is the essence of a loopback test.
LSD - Low speed data channel of H.320.
Luma - Brightness ( black and white ) information in a video image. Short for luminance.
Luminance - Brightness ( black and white ) information in a video image. Often called luma.