Transportation

Transportation infrastructure is the backbone of every economy; therefore, it is important to provide secure voice communication in areas like metro/rail stations, airports, and tunnels.

The structural and functional requirements of PAVA systems for transport hubs are as follows:

• Redundant design to avoid a single point of failure.
• A DSP-based controller equipped with a MIC bypass port to allow the paging microphone to page the amplifiers in case of CPU failure of the controller.
• Noise sensing microphones to measure the background noise and to control the gain accordingly.
• At least two driven audio buses are to feed two sets of amplifiers as a redundant structure.
• Each output zone is to be divided into two monitored lines; each line is to be powered from a separate amplifier channel to avoid a single point of failure.
• Each line is to be impedance monitored.
• Integration with building management is to be achieved over Ethernet using Modbus protocol.
• EN54 -4 compliant secondary power supply to be available in case of main power failure.
• Full integration with the SIP intercom system.

Redundancy is required in the transportation sector as any failure of such a system leads to chaos and traffic congestion.