Glossary:

ATIS Telecom Glossary

Search Keyword By: S

Select a term name to open its entry and any media references. Longer definitions end with a “Read More” link.

SIP

Session Initiation Protocol

site

1. The totality of all of the Internet facilities—http, ftp, etc. —offered by an individual or an organization. [After Bahorsky]
2. A Web location where Web pages are found. Synonym (in this sense) Web site.
Note: A Web site describes only those resources available through the World Wide Web.

skew

1. In parallel transmission, the difference in arrival time of bits transmitted at the same time.
2. For data recorded on multichannel magnetic tape, the difference between reading times of bits recorded in a single transverse line.
Note: Skew is usually interpreted to mean the difference in reading times between bits recorded on the tracks at the extremities, i.e., edges,… (Read More →)

skew ray

In a multimode optical fiber, a bound ray that travels in a helical path along the fiber and thus (a) is not parallel to the fiber axis, (b) does not lie in a meridional plane, and (c) does not intersect the fiber axis.

skimming

The act of producing unauthorized copy of an electronic security device while it is being used for its intended purpose.
Note: Originally, skimming meant making an illegal copy of a credit card or a bank card when the original was being used correctly. Typical methods of skimming involve use of a modified reader that reads and stores all the information… (Read More →)

skin effect

The tendency of alternating current to flow near the surface of a conductor, thereby restricting the current to a small part of the total cross-sectional area and increasing the resistance to the flow of current.
Note: The skin effect is caused by the self-inductance of the conductor, which causes an increase in the inductive reactance at high frequencies, thus forcing… (Read More →)

SKIP

SKIP is a trunk group control that allows traffic to be directed to the next route before hunting for a circuit to a destination. Equipment vendors commonly provide the capability to implement this control on a percentage basis.

skip distance

At a given azimuth, the minimum distance between the transmitting station and the closest point of return to the Earth of a transmitted wave reflected from the ionosphere.

skip zone

An annular region within the transmission range of an antenna, within which signals from the transmitter are not received.
Note: The skip zone is bounded by the locus of the farthest points at which the ground wave can be received and the nearest points at which reflected sky waves can be received. Synonyms silent zone, zone of silence.

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