Understand the three-way call system: the training should first introduce the basic principle and composition of the three-way call system, including the functions and operation methods of the call host, car phone and computer room phone.

Master how to use the three-way call system: The training should explain in detail how to use the three-way call system to make calls, including how to make calls, how to answer calls and how to transfer calls.

Understand the application scenarios of the three-way call system: The training should introduce the application scenarios of the three-way call system in elevators, including emergency rescue, equipment maintenance and personnel coordination. And emphasize the important role of the three-way call system in an emergency.

Master the fault handling methods of the three-way communication system: The training should teach how to handle the faults of the three-way communication system, including fault diagnosis and troubleshooting, so as to ensure the normal operation of the elevator in an emergency.

Practical demonstration: during the training process, practical demonstration can be conducted to let employees know how to use the tripartite communication system correctly, and emphasize that employees should pay attention to safety in actual operation.

Regular inspection and maintenance: Finally, we should emphasize the importance of regular inspection and maintenance of the three-party communication system to ensure that the system always maintains a good working condition during use and avoid the system failure affecting the normal operation of the elevator.