Security

Door Entry Info

When installing door entry products it is recommended that prior to ordering a site survey is conducted to determine the customers requirements and make estimates for cable lengths, in our experience using the correct cables is one of the most important requirements of a successful installation.

Selecting which products work with which cables

There are a number of different cable types including CAT5, CAT6, Belden, BT, Intruder (stranded) and co-axial. Every manufacturer will specify the type of cable and maximum cable lengths their systems are designed to operate over, this recommendation should be taken into consideration prior to installing any cable or if the installation is a retro fit, the cable types and lengths should be checked to ensure the products selected can work. If you are unsure, please contact us for assistance.

Determining product requirements

Some requirements are obvious such as selecting an audio or video system, however product selection will require consideration of other points, surface or flush fitting, vandal resistance and extreme environment are three areas which need to be determined. VR in a part number for a call station determines the product is deemed vandal resistant, they are usually manufactured from robust materials such as stainless steel and have rounded flush fitting buttons reducing their vulnerability, typically VR panels will be flush fitting for maximum protection, however they can be surface fitted with the correct case. If a property is close to the sea (within 5 miles) or has a swimming pool then to ensure the panel lasts you should consider specifying marine grade products which have been tested to resist salt and chlorine.

Wired or wireless

Hard wired is usually recommended for door entry systems and will provide the most reliable connection, however on occasions it may not be practical to install cables between the call point and the property, there are now several wireless technology options which may be considered, please see a list below along with recommendations giving rule of thumb rules for a successful installation.

Audio DECT - This call point requires local low voltage power and provides a switched output to control gates/electric locks, it utilises industry proven DECT (digital electronic cordless telephone) technology to communicate with a base station installed within the property which then communicates with portable hand held receivers. Suited only to sites with under 100 metres distance between the call point and the base station, best practice is to test that a DECT telephone handset can make a call from the door/gate where the call point is to be located using a standard DECT telephone during site survey. Not suited to multi apartment systems this product is designed for domestic, light commercial and retail environments where a single door/gate is to be controlled. Typically the systems are closed design, only working with supplied handsets.

Video DECT This call point requires local low voltage power and provides a switched output to control gates/electric locks, it utilises industry proven DECT (digital electronic cordless telephone) technology to communicate the audio signal with a base station installed within the property which then communicates with portable hand held receivers, in addition it utilises a proprietary wireless technology to transmit video directly to the handset. Suited only to sites with under 100 metres distance between the call point and the base station/ hand set, best practice is to test that a DECT telephone handset can make a call from the door/gate where the call point is to be located using a standard DECT telephone during site survey ensuring audio and control functions are reliable, video is line of sight and directional and may suffer from loss of frames/drop outs or non functionality in some areas caused by items blocking the direct line signal path required. Not suited to multi apartment systems this product is designed for domestic, light commercial and retail environments where a single door/gate is to be controlled. Typically the systems are closed design, only working with supplied handsets.

Audio GSM - This call point requires local low voltage power and provides a switched output to control gates/electric locks, it utilises industry proven GSM technology and will require a dedicated SIM card from a GSM service provider, the call point requires no other parts as it is programmed with telephone numbers to communicate with the person authorised to control access through the door/gate. The GSM system is not limited by range however prior to installation and/or ordering a SIM card you should test several phones on different service providers networks to determine that a reliable service is available from the proposed location of the call point. This system is available in multiple call point format making it suited to apartment blocks and has an added benefit that the gate/door can be controlled by the person receiving the call even if they are not at the premises at the time.

Video GSM - This call point is identical to the audio GSM but provides video call technology when coupled with a suitable smart phone, please note: iPhones are not compatible with this product as Apple use a different technology. The costs of video calls should be taken into consideration when purchasing this product and when selecting a network service provider.

Installing external call points - IP Ratings

Please note that most call points do not have an IP rating unless they are installed correctly, to achieve an IP rating manufacturers recommend that call points have additional sealing completed by the installer. Please see details below as a guideline to best industry practice when installing.

Flush fitting panels require the faceplate to be sealed with a watertight gasket (silicone sealant or self adhesive foam tape) on both the sides and top where the overlap of the faceplate meets the surface into which it is to be flush fixed, in addition if the product is installed into a metal post or hollow brick pillar, the column below the cut out will require sealing to prevent evaporated ground water from condensing inside the call point.

Surface fitting panels require the surface box supplied is installed in a sheltered location and be sealed with a watertight gasket (silicone sealant or self adhesive foam tape) on both sides and top where the surface box meets the surface to which it is to be fixed, in addition if the product is installed onto a metal post or hollow brick pillar, the cable access cut out will require sealing to prevent evaporated ground water from condensing inside the call point, this will achieve a similar rating to IP54 (protected against dust and splashing water). Where a sheltered/covered location is not practical additional sealing to uprate the call point to withstand driving rain must be installed, typically this will mean adding an additional watertight gasket (silicone sealant or self adhesive foam tape) to close off the panel gap between the faceplate and the surface housing.

The recommendations for sealing panels described are industry standard best practice and are required to maintain the warranty of the product.