TracPhone V7 User’s Guide
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Appendix C - Glossary
Ping
Software utility used to check a network connection. Sends a test
packet to the designated address and reports how long it takes to
receive a response.
Polarization
Orientation of a satellite signal. Circular polarization, which has a
“corkscrew” propagation path, consists of left-hand (LHCP) and right-
hand (RHCP) signals. Linear polarization consists of vertical and
horizontal signals offset by 90 degrees.
Protocol
Standard that establishes strict rules for how data is communicated
over a network.
Return Link
Communication path from the antenna to the satellite. Another term
for “Uplink.”
RF
Radio Frequency.
RJ45
Registered Jack 45. Eight-wire network cable connector for LANs.
Similar to a telephone jack.
Router
Device that connects multiple IP networks. For each data packet it
receives that is destined for another IP network, determines the best
path to reach its destination.
RSSI
Receive Signal Strength Indicator. Indicates the strength of the
received satellite signal. The modem supplies this data to the control
unit for tracking purposes.
Rx
Receive.
