Founded in 1989 as an electronic design consultancy, we began our journey in the voice alarm market 1999 with the design and supply of technology-leading evacuation systems for London Underground. We subsequently established ourselves as a key supplier to the transport industry. Built on this foundation, we now design and manufacture products for customers worldwide, and cater for both emergency and non-emergency audio applications.In August 2021 Zenitel acquired 100% shares of ASL. Zenitel is fully committed to further developing the original ASL business and its team in the UK. Zenitel is one of the technology leaders in intelligent critical communication. Joining forces with Zenitel will enable us to strengthen our market position. The combination of both product ranges will be a key benefit to delivering higher added value solutions to our end customers, offering a true turnkey solution.With over 30 years of experience, we have established sophisticated design techniques, meticulous manufacturing processes, stringent testing programs, and world-class products and solutions. Our professional audio and control systems save lives, ease operation, and reduce risk and total cost of ownership throughout the entire product lifecycle.Customers worldwide have confidence in the quality and value of our products and solutions, as well as in our ability to deliver and support systems through their design, installation, commissioning, and operation.

BS5839 part 8 EN60418 Passenger Information Display Systems Public Address Voice Alarm (PAVA) Long Line Public Address (LLPA) EN54-16 Dante Station Management Systems Public Address Systems (PA) TransQ LinkUp Control Systems Passenger Information Display Systems (PIDS) Station Management Systems (SMS) RISQS Commercial Audio Voice Alarm (VA) Public Address (PA) Evacuation Systems PAVA Microphones