Comtech EF Data Vipersat CDM-570 User Manual page 156

GUI
Graphical User Interface – A form of graphical shell or user interface to a
computer operating system.
HDLC High Level Data Link Control – A standard defining how data may be transmit-
ted down a synchronous serial link.
HPA
High Power Amplifier – The amplifier used in satellite communications to raise
the transmit signal to the correct power level prior to transmission to satellite.
See also SSPA.
HTTP
Hyper Text Transfer Protocol – The Internet standard for World Wide Web
(WWW) operation.
Hub
The central site of a network which links to a number of satellite earth sites.
ICMP Internet Control Message Protocol
Installation A program which guides the user through the process of installing an applica-
Wizard tion.
IF
Intermediate Frequency – In satellite systems, IF frequencies are usually
centered around 1200 MHz (L-band), or 70/140 MHz (video/TV).
IP Internet Protocol – A format for data packets used on networks accessing the
Internet.
ISP Internet Service Provider – A company providing Internet access.
ITU
International Telecommunications Union
Kb/s Kilo bits per second - 1000 bits/second. A measure of transmission speed. See
also bps & Mb/s.
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V i p e r s a t C D M - 5 7 0 / 5 7 0 L U s e r G u id e