
TracPhone V3-IP User’s Guide
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Glossary
PSTN
Public Switched Telephone Network. Worldwide telephone network
carrying analog voice signals.
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.
RX
Receive.
SIP
Session Initiation Protocol. Protocol for routing VoIP calls.
Skew
Adjustment angle to orient an LNB with a linearly polarized satellite
signal.