Showing 1 - 20 of 81 results

WAN

May 19, 2015

Wide Area Network ... Read More

On-line

May 19, 2015

Electronic availability on demand from a computer-based system without mounting removable media such as magnetic tape or disks. ... Read More

Outage

May 19, 2015

A telecommunication service condition wherein a user is deprived of service due to a malfunction of the communication system. ... Read More

Packet

May 19, 2015

In data communication, a grouping of a sequence of binary digits, including data and control signals, that is transmitted and switched as a composite whole. The data, control signals, and possibly error control information, are arranged in a specific format. The packet can be of either fixed or variable length. ... Read More

Packet mode

May 19, 2015

A packet switched operational mode for transferring (transporting and switching) user information through a network without establishing a connection. The packets do not necessarily arrive at their destination in the order they were sent, unlike the circuit mode of transmission. See packet switching. ... Read More

Protocol

May 19, 2015

Any set of standard procedures that permit devices to intercommunicate. ... Read More

Public Switched Telephone Network (PSTN)

May 19, 2015

Any common carrier network that provides circuit switching among public users. Note: The term is usually applied to the public switched telephone network, but it could be applied more generally to other switched networks, e.g., packet switched public data networks. ... Read More

Quadrature Phase Shift Keying (QPSK)

May 19, 2015

Digital modulation scheme used in transmission communications that allows increased sending capacity. ... Read More

Radio Frequency Interference (RFI)

May 19, 2015

A term used to denote apparent disturbance or distortion to satellite signals. ... Read More

Narrowcasting

May 19, 2015

Using the electronic media to reach a specific audience ... Read More

MSS

May 19, 2015

Mobile Satellite Service ... Read More

ISDN

May 19, 2015

Integrated Services Digital Network ... Read More

k/bs

May 19, 2015

Kilobit per second ... Read More

Ka-band

May 19, 2015

A higher frequency than Ku-band, operating from 18 to 31 GHz. ... Read More

Ku-band

May 19, 2015

The range of frequencies between 11 and 14 GHz used increasingly by communications satellites. ... Read More

LNA

May 19, 2015

Low Noise Amplifier ... Read More

Local Area Network (LAN)

May 19, 2015

A data communications system that (a) lies within a limited spatial area, (b) has a specific user group, (c) has a specific topology, and (d) is not a public switched telecommunications network, but may be connected to one. ... Read More

Modem

May 19, 2015

Acronym for MOdulator-DEModulator. A device that modulates and demodulates signals. Note: Modems are primarily used for converting digital signals into quasi-analog signals for transmission over analog communication channels and for reconverting the quasi-analog signals into digital signals. ... Read More

Modulation

May 19, 2015

The process of superimposing an information signal onto a carrier for transmission. ... Read More

Shared hub

May 19, 2015

A satellite communications operations center which is shared among a number of separate network users; often used for VSAT operations. ... Read More