Talkback System

Functional brief and Specifications of Talkback Systems

Objective
The purpose of installing a talkback system is to enable communication between occupants in trouble zones and rescue support staff.

System Components
The talkback system consists of hands-free units equipped with a speaker, microphone, and a single call button.

Master Control and Receiver Unit
The master control and receiver unit typically includes a handset or microphone and a panel speaker for two-way conversations. It features a display to indicate the caller’s location and control buttons/icons for targeted calls and conference calls.

Operation
When needed, users can activate the talkback unit by pressing the call button. This action will prompt the control panel to display the device ID and location along with a ringtone. The user can then acknowledge the call, establishing a connection for conversation.

Audio Specifications
The talkback unit’s speaker output shall be a minimum of 65 dB, ensuring it is audible to listeners. The microphone should be capable of picking up voice from a distance of up to 1 foot with intelligibility.

Fault Monitoring and Supervision
Each talkback unit is electrically supervised for fault monitoring. The recommended cable for the talkback system shall be fire-resistant, with each core of the cable electrically supervised for open and short circuits.

Connectivity Monitoring
The control panel shall also monitor each talkback speaker unit for connectivity. When a unit experiences defects or connectivity issues, it shall be detected and provide an audio-visual warning.

Power Backup
The talkback system shall include a secondary battery for power backup to ensure an uninterrupted power supply.

Note:

For talkback units exposed to sunlight, the enclosure should be paintable to prevent color fading due to UV rays. Regular repainting will help maintain its appearance. Additionally, talkback units installed outside, especially in refuge areas, must have weatherproof enclosures to ensure durability and reliable operation in outdoor conditions.

What are the locations Talkback speaker unit shall be installed ? 

  1. Each floor level
  2. Each notification zone
  3. Each elevator cab
  4. Elevator lobbies
  5. Elevator machine rooms
  6. Emergency and standby power rooms
  7. Fire pump rooms
  8. Areas of refuge
  9. Each floor level inside an enclosed exit stairs
  10. Other rooms or areas as required by the authority having jurisdiction.