“BBU CPRI Interface Error” alarm Troubleshooting

 

We need to check the following steps:

1. At first we need to check the RRU is getting power or not.

2. Also have need to check the voltage in power cable by multi meter, it must be minimum -48V dc.

3. If RRU is getting power then we need to check the CPRI cable. If the alarm is in cell B, then we can interchange the CPRI cable with cell A (from both GTMU and RRU), if the alarm is shifted to Cell A, then the problem was in CPRI cable. So we need to change the CPRI cable. If CPRI cable is faulty, the CPRI 0 led will be blinking.4) For BBU optical module transmit receive fault, we need to check the optical

module of the CPRI cable.

thanks for your experience note , carry on.........

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useful document, thanks