User's Manual

SPEEDLAN Installation and Operation User Guide
Glossary-8
Hertz (Hz)
A unit of measurement equal to one cycle per second.
Hexadecimal (Hex, or H)
A Base-16 numbering system. This means 16 sequential numbers are used as a base unit (i.e., “0-9” and “A-F”).
Hop
A term used to describe a single radio path between two points.
Host
This term is interchangeable with the definition “node,” which means this is a point on the network. The host is also any
device on the network that has two-way communication to any point on the network, as well as the Internet.
Hot-standby
A condition whereby when the primary method of communication goes down, the secondary method instantly takes over.
Hub
This device on a network collects, receives, and repeats data to its forwarded destination on the network. A hub is also
known as a switch.
HyperTerminal
This provides you details of the internal configuration of the ODU. In the HyperTerminal, you can also change the port set-
tings for the modem connection and adjust the settings to make a call.
IDU
Indoor Unit (i.e., Modem Unit).
IF Cable
In an SPEEDCOM system, this is the coaxial cables that connects the modem unit to the RF unit. These cables are termi-
nated with male TNC-type connectors at both ends.
Interface
The standard signal for connecting a microwave system to the connecting equipment.
Interference
Unwanted signals that cause performance degradation or loss of information.