A variable-duration window that allows a sender to transmit a specified number of data units before an acknowledgement is received or before a specified event occurs.
Note: An example of a sliding window in packet transmission is one in which, after the sender fails to receive an acknowledgement for the first transmitted packet, the sender "slides" the window, i.e., resets… (Read More →)

Acronym for serial line Internet protocol. A protocol that allows a computer to use the Internet protocol (IP) with a standard telephone line and a high-speed modem.

1. The repetition or deletion of a block of bits in a synchronous or perspicacious bitstream due to a discrepancy in the read and write rates at a buffer. [T1.101-1987]
2. In a sequence of transmitted symbols, e.g., digital bits, a signal phase shift, i.e., a signal positional displacement, that causes the loss of one or more symbols or the… (Read More →)

Operation of a communications system with sufficient phase-locking to avoid overflowing or emptying buffers.

Synonym line source.

In a transmission line, the rate of change of attenuation with respect to frequency over the frequency spectrum.
Note 1: The slope is usually expressed in dB per hertz or dB per octave.
Note 2: In metallic lines, the slope is usually greater at high frequencies than at low frequencies.

A device or circuit used to achieve a specified slope in a metallic transmission line.

Data compaction accomplished by stating (a) a specific keypoint of departure, (b) a direction or slope of departure, (c) the maximum deviation from a prescribed specific value, and (d) a new keypoint and a new slope.
Note: An example of slope-keypoint compaction is the storage or transmission of a slope and one point on a straight line instead of storing… (Read More →)

In a distributed-queue dual-bus (DQDB) network, a protocol data unit (PDU) that (a) consists of 53 octets used to transfer segments of user information, (b) has the capacity to contain a segment of 52 octets and a 1-octet access control field, and (c) may be either a pre-arbitrated (PA) slot or a queued arbitrated (QA) slot.

A radiating element formed by a slot in a conducting surface or in the wall of a waveguide.