Interference issue between 2G/3G and 4G Basebands during fiber connection

[Dalton]

Hello Ericsson Experts.

We have two Ericsson basebands on-site, one for 2G/3G and another for 4G.

While replacing the 4G baseband, we noticed that each time we connect the fiber cables to the 4G baseband, the 2G/3G service stops carrying traffic.

However, when the 4G baseband is powered off, the 2G/3G service resumes normal traffic.

Has anyone experienced this issue before? If so, please share the root cause.

Thank you!

[Maxy]

Verify the NGS priority.

Check the sync quality.

The sync is shared between the basebands, correct? If possible, try providing separate sync sources for each baseband.