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ASL Safety & Security supplies IP-networked public address systems to LOROL stations

Published on 5 November, 2009

Station on London Overground Rail Operation Limited's network
ASL Safety & Security provides IP-networked public address systems for installation at over 50 stations
ASL Safety & Security are providing IP-networked public address systems for installation at over 50 stations on London Overground Rail Operation Limited's network, with some of the locations using the company's pioneering dynamic ambient noise sensing system (DANS) to overcome background sounds and reduce noise pollution.

Through three different contract routes, ASL have won 95% of the LOROL stations, building on an extensive presence in the capital at 170 London Underground stations and a considerable market share within the overground network.

All London Overground stations are secure station accredited by the Department of Transport and this CIS project serves to enhance the already-high customer service standards.

The project includes monitored PA equipment at 44 stations which is being supplied through Amey, and a separate contract covering 12 stations for LTE Network Communications on the former Silverlink franchise. ASL have also provided public address and voice alarm systems to Thales for installation at ten stations on the East London Line, with this equipment also including ASL's Voice Over Internet Protocol (VoIP) LLPA equipment.

A dozen sites will be upgraded or maintained to BS5839:8 voice alarm specification, with the client opting for ASL's ruggedised radio microphones which have been developed for ergonomic and audio performance after use on London Underground.

London Underground stations including North Wembley, Queens Park, West Brompton and Harlesden will also benefit from dynamic ambient noise sensing which improves audibility of train platform announcements by using signal processing to distinguish between ambient noise and the announcement, optimising volume levels in real time. Other equipment being used includes ASL's Intellevac VAR router range and Adaptive Class D amplifiers which are among the most power-efficient in the industry.

Richard Lack, Director of Sales & Marketing at ASL, said: "ASL has invested heavily in developing next-generation technology in the rail sector which meets all of the relevant Network Rail and LUL standards. We are delighted to have been selected as a technology partner on this project which is a significant element in the overall regeneration of London's transport infrastructure in preparation for the 2012 Olympics."

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