What is the difference between a three-party and five-party elevator intercom?
提问时间：
2024-03-21
回答
The terms usually describe the number of communication points, but suppliers may count those points differently. Specify the required locations, such as the cabin, car top, pit, machine room and monitoring room. Confirm which stations can call and speak to each other in the proposed system.
回答时间：
2024-03-22
