How to write the sign and telephone number of the security duty room?

The sign on the security duty room says "Security duty room" and the telephone number of the company switchboard.

1, the sign of the security duty room will clearly indicate "security duty room", so people can clearly identify the purpose of the room. This sign allows employees and visitors to quickly find the security duty room and improve the search speed.

2, telephone number, write the company switchboard number. The switchboard number is a unified contact way to ensure fast and convenient communication with the safety duty room.