BBU CPRI Optical Module or Electrical Port Not Ready

BBU CPRI Optical Module or Electrical Port Not Ready

This alarm is reported when the optical module on the CPRI port of the BBU is not in position or when the cable connection on the CPRI optical module or electrical port is not ready.

In chain topology, the CPRI link of lower-level RF units is disconnected. The services carried on lower-level RF units are disrupted.

In ring topology, the reliability of the CPRI link decreases. In this case, the active CPRI link of lower-level RF units is switched over to the standby CPRI link. In the case of a hot ring, the ongoing services are not affected. In the case of a cold ring, the ongoing services are disrupted temporarily.

the main cause for this alarm are:

?A redundant RRU chain/ring is configured.

?The optical module on the CPRI port of the BBU is not in position, or the cable connection on the CPRI optical module or electrical port is not ready.

?The optical module on the CPRI port of the BBU is faulty, or the cable connected to the CPRI optical module or electrical port is faulty.

?The connecting piece on the CPRI port of the BBU is faulty.

From our experience, we see this alarm rarely come individually rather come with BBU Optical Module Transmit/Receive Fault ,BBU CPRI Interface Error and others.

useful