"4 Site have dealt promptly with any issues or requests and the way they deliver their service makes us feel our property is in safe hands."
Simon Turner, Director

Monitored Intruder & Fire Alarm Systems

Every security system has the capability to be linked to an alarm receiving centre which is operational 24 hours a day. Our operators have all the information at hand to deal with events as they happen and contact keyholders and emergency services as required.

There are several methods by which alarm signals can be transmitted through to our central station:

Digital Communicators

These are connected to telephone lines to dial the monitoring centre and pass alarm signals.

Redcare Classic

BT Redcare LogoA system of sending alarm signals direct to the monitoring centre without the need to “DIAL OUT”. This system provides a higher level of integrity of signalling in that the alarm system is regularly “POLLING” to ensure the integrity of the telephone line.

Redcare Secure

An alarm signalling device that totally combines GPRS (mobile technology) with the added protection of any standard telephone line as a backup path. If either is interfered with by an intruder, the other continues to monitor for any further alarms.


CSL DualcomThe DualCom GradeShift® range, from CSL DualCom Limited, is an intruder alarm signalling device that uses any UK mobile network as well as your telephone and/or IP path; to transmit intruder, fire and personal attack signals at high speed.

DualCom Digi Air

A cost effective Grade 2 signalling service designed for use where there is no landline or as a digi replacement. Based on the standard Secure product and using wireless signalling it can be installed anywhere that receives a good GPRS signal.


Emizon, simply protected, simply secure.Emizon 21 is the smart, secure alarm, dual-path signalling service for commercial and domestic premises. Using both broadband and GPRS networks Emizon 21 enables you to deliver advanced dual-path signalling to your customers for less than the cost of conventional competitive services.

4 Site Security Services Ltd

4 Site Security Services Ltd,
Bank House
Parkfield Street
West Yorkshire
LS11 5PH
Tel 0113 2002060
Fax 0113 2002061
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