1. Application

 During construction of high-rise buildings, high efficient and reliable communication between construction lifter passengers and the lifter cage driver is very important.To make the lifter run more efficient and make the communication between lifter passenger and operator more reliable, this system is designed by our company for such needs.

2. Specifics

Wireless technology is used for the communication between the host and pagers. The host applies micro processing chip,which can automatically detect calling signals and avoid the comflicts due to multiple floor pagers send the calling signal simultaneously.It has very friendly operating interface. Any passenger on whatever floor can send signal through the pager, and the host installed in the lifter cage driving room will show the calling floor number, then the operator will drive the lifter cage to the corresponding floor, which hugely improves working efficiency of the lifter. This system applies wireless alarm frequency band，frequency-stabilizing and anti-cochannel interference technology, which ganrantees working stability, long distance communication and anti-interference.

3. Composition

Each system composes two displaying control units(named Host) and dozens of calling switch boxes (named Pagers, maximum 63 pieces so far). Each host is installed on the control panel in the lifter cage driving room, and the pagers are installed on each floor correspondingly. All pagers are powered just by dry batteries which makes power source wiring not necessary, very easy to install and use.

 Wireless communication technology is adopted between hosts and pagers. No need to setup wiring for signal transmission which makes the installation

piece of cake.

4.  Diagram of the displaying Host

5. Wireless signal emission and reception diagram