When you encounter an online fault of calling 485 on the fire phone, don't worry, and follow the following steps to solve the problem easily.

Check the hardware connection

First, check whether the communication line of the fire telephone panel is connected correctly, whether the plug is loose or damaged, and whether the pins are in good condition.

parameter testing

Secondly, confirm that the parameter setting of the fire telephone panel is consistent with other equipment. If necessary, please reconfigure.

Equipment status check

Then, check whether the online equipment such as the fire engine works normally and whether there is any abnormality.

Line and power check

Then, confirm that there is no problem with the 485 communication line and the power supply of the equipment is normal.

Seek professional help

If all the above methods fail, contact the fire equipment supplier or technical support, they are more professional!