RF unit CPRI interface error, BBU CPRI interface error.

RF unit  CPRI interface error,  BBU CPRI interface error.

This alarm is reported when the data transmission on the CPRI link (at the link layer) malfunctions between the BBU and the lower-level RF units.

main Causes

?If the CPRI optical transmission is used, the optical module or connector of the BBU or lower-level RF unit may be improperly installed, or the optical link is faulty.

?If the CPRI electrical transmission is used, the cable connector of the BBU or lower-level RF unit may be improperly installed, or the cable is faulty.

?The BBU or lower-level RF unit is running improperly, or the hardware is faulty.

For alarm, Carrier configuration error, we need to check the TRX power of the RRU.If 4 trx configured in one port then the power must be 15W for each trx.If 4 trx configured in different ports(A and B) then the power must be 20W for each TRX.