Hello friend!
Description
This alarm is generated when the reverse power from the power output of the TRX is too high. This alarm is generated when the cables concerning the power output port of the TRX (TX1, TX2, TCOM) are not properly connected. This alarm is generated for the Carrier Module if the VSWR exceeds the major VSWR alarm threshold of the Carrier Module. This alarm is generated when the antenna jumper is not connected to the antenna port of the Carrier Module.
Possible Causes
The cable is not securely connected to the power output port of the TRX.
The cable is not securely connected to the power input port of the RF front-end unit.
The cable between the power output port of the TRX and the power input port of the RF front-end unit is damaged.
The RF front-end unit is faulty.
The DTRU is faulty.
For details about how to clear the alarm, click: ALM-4144 TRX VSWR alarm
Hope this helps!