4RF Aprisa XE User Manual - page 213
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272
Interface connections | 212
QJET Interface connections
Pin
number
Pin function
Direction
TIA-568A wire
colour
1 Transmit
Output Green/white
2 Transmit
Output
Green
3 Not
used
Orange/white
4 Receive
Input
Blue
5 Receive
Input
Blue/white
6 Not
used
Orange
7 Not
used
Brown/white
8 Not
used
Brown
RJ-45 connector LED indicators
LED Status
Explanation
Green On
Normal
operation
Yellow
On
Loss of signal (LOS) or
Alarm Indication Signal (AIS) or
Loss Of Frame alignment (LOF) in Framed
modes
Green
Flashing
Port in loopback
The standard QJET interface is 120 ohm balanced.
External Balun transformers can be used to provide a 75 ohm unbalanced interface.