New HT488 problem

[Halea]

After I upgraded 3CX to the latest version, I am experiencing problems with my HT488 again. This time I am getting the following errors for each uncompleted call:
14:25:36.145 MediaServerReporting::RTPReceiver [MS105000] C:8.1: No RTP packets were received:remoteAddr=192.168.xxx.xxx:5004,extAddr=0.0.0.0:0,localAddr=192.168.xxx.xxx:7002
14:25:36.145 MediaServerReporting::RTPReceiver [MS105000] C:8.2: No RTP packets were received:remoteAddr=192.168.xxx.xxx:5008,extAddr=0.0.0.0:0,localAddr=192.168.xxx.xxx:7004

Through the handset I simply hear a busy signal.
This setup was fully functional until the latest upgrade.
Any ideas about what to do?
Halea

 

[5qg4]

Both 3CX box and HT488 are in same LAN?

 

[Halea]

Yes, they are connected to the same LAN.
Halea