Mikrotik 3011 - Connection lost _OSPF used.

Hello, I’m new here.
I’m working with a Mikrotik 3011 router that feeds a camera installed on a tower at a height of 70 meters.
It frequently loses data connection, I disconnect and restart the camera and it works again, after a while it goes down again, it doesn’t ping when I apply the ping command.
What should I do in this case? What is the ideal configuration?

Note: Port 3 of the Mikrotik router and the camera are configured as autonegotiation and 100 Mb.

It might be a PoE issue with a 70-meter ethernet cable to the camera. What voltage are you feeding the MikroTik RB3011 with?

EDIT
Wait, you are using port 3 which doesn’t have PoE out. Does this mean your camera is powered locally?