ASL Safety & Security offers IP-based long-line public address and voice alarm (PA/VA) systems for rail, light rail and other mass transit infrastructure hubs. ASL pioneered the use of energy-efficient Adaptive Class D amplification in its PA/VA range, removing the need for forced cooling. The company’s fanless wall and rack-mounted systems have received extensive endorsement on global infrastructure projects.
Monitored public address system
ASL’s iPAM product is a monitored public address (PA) solution that has been created specifically for rail projects. ASL integrates routing, amplification, PC/DVA and CIS software functions into a robust voice over internet protocol (VoIP) offering. Where necessary, a graphical user interface (GUI) can be provided by ASL’s mini-iVENCS software, which can operate from Linux, Windows, Solaris and OS X. Clients benefit from dual redundancy should they require it.
As well as offering core public address – predominantly platform and public concourse announcements – iPAM provides general customer information system (CIS) functionality such as digital voice announcements (DVA) and text to speech. iPAM also supplies network-wide fault reporting to a client’s control centre workstations.
Operators and maintainers receive status information on the PA system and potentially on related disciplines such as CCTV and access control. BS5839:8-compliant voice alarm can be provided using ASL’s VAR router and V400 amplifiers. Client feedback on a UK light rail network has stressed the benefits of flexibility and scalability within this architecture, particularly in environments requiring multiple controls.