How to adjust the wireless intercom signal in an elevator?

When the signal of the elevator wireless intercom system is poor, there are generally the following situations.

The usage range of the elevator wireless intercom equipment exceeds 2 kilometers, and the transmission power of the equipment cannot reach the required level

There are other high-power transmission devices around the usage environment, which affects the signal transmission

The antenna is placed in a closed environment and is not placed upright

The power supply of the elevator wireless intercom system is low and cannot drive the transmission power of the equipment

Signal transmission equipment of the same frequency as other devices