The PWD (person with disabilities) Call System is designed specifically to help the evacuation of a person with disabilities in the shortest possible time after he or she has made an emergency call at the nearest holding area.

Once an emergency call is made, the guard must go to the holding point (calling zone) to rescue the person and clear the call. Call alert cannot be cleared remotely on the monitoring panel, the PWD Zone Controller. All the important events are logged into the system memory for future reviews. The logged messages indicate when an emergency call was made and when a rescue operation was carried out and completed.

The emergency call button, or Smart Call Button (SCB), features built-in alert tone and dual-colour LED indication. This give important feedback, especially to a person with visual or hearing impairment. This is one of the requirements stated in Singapore BCA's Fire Code for PWD.

Very simple wiring, a single 4-wire cable can support up to 16 zones with distance up to 1000m meters if using AWG20 twisted pair cable.