The set of rules that dictates how binary 1s and 0s are electrically transmitted over a wire.
Link Fragmentation and Interleaving (LFI)
A QoS mechanism that reduces serialization delay by fragmenting large payloads and interleaving small payloads in among the fragments.
liquid crystal display (LCD)
The technology used by many Cisco IP phones to display XML pages, line appearances, and softkey settings.
The connection from your home to the local central office, made up of tip and ring wires.
Locally Significant Certificate (LSC)
Digital certificates used by Cisco IP phones released prior to the 7970G model.
look ahead buffer
A storage area used by a CODEC to see whether a voice sample matches a pattern already in a dynamically created codebook, which allows the codebook location to be transmitted instead of the actual sample, thus reducing required bandwidth.
loop start signaling
Lets a phone switch know a phone went off-hook by current flow through the local loop.
Low Latency Queuing (LLQ)
A queuing technology that can give priority treatment to specific traffic types, such as voice.