CSL Group Limited is a specialist IoT critical communications company that evolved from a fire and alarm signalling business. CSL operates across the United Kingdom, Spain, Ireland, the Netherlands, Belgium and Sweden. CSL began as a supplier of dual signalling burglar alarms. CSL pioneered the use of dual signalling, wherein the alarm system communicates with a monitoring station using both wired (telephone or internet) and wireless (GPRS/GSM) communications for increased reliability. CSL is among the UK's suppliers of signalling for intruder alarms, managing the signalling of residential and commercial installations. More information...
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