A range of NEW High Performance DOOR PHONES have recently been released !     GENERAL INFORMATION    Our DOOR PHONE devices are specifically designed for connection to a National Communications DOOR STATION (CONTROLLER).   The DOOR PHONE can operate at distances of up to 200 meters from the Controller, providing high quality cabling such as CAT5 is used.   Up to two DOOR PHONE devices can be connected to the one DOOR STATION (CONTROLLER). This allows for a separate DOOR PHONE to be located at two different locations. In this situation, the DOOR PHONE devices are  connected in parallel. (see User Guide for further detail).   Your DOOR PHONE is designed for wall or pole mounting at a height of approximately 1.5 meters (5 feet). Visitors should stand within 0.5 meters (20 inches) of the Door Phone for best results.   Our DOOR PHONE  are designed to be highly WEATHER RESISTANT and they have proven to be highly reliable over long periods of time, providing it is not exposed to direct rain. The Speaker is made of a plastic Mylar material and great effort has been taken to maximise weather proofing all electronic components.  Our DOOR PHONE devices are not FULLY WATERPROOF.   Whenever  your  DOOR PHONE is not under cover, use of the optional PERSPEX DOOR PHONE COVER is essential to ensure that water from rain cannot gradually permeate through to the electronics of the Door Phone which can cause unreliable operation and can eventually lead to permanent failure of this device.   The face plate of the Flush Mount Door Phone is made from High Quality Brushed Aluminium, which has been anodised silver. This material provides exceptional long term durability and is far superior to the 304 Grade Stainless Steel which we have used in the past.   FLUSH MOUNT DOOR PHONE   Our FLUSH MOUNT DOOR PHONE (FMDP) device designed to be recessed into a wall surface.  It can be fitted vertically OR horizontally.         When mounted horizontally, you may wish to purchase the optionally available galvanised iro ‘wall mount box’, which can be fitted in place of a brick. The FMDP is designed to precisely fit this accessory.   The FMDP is then located in place by using 2 supplied stainless steel mounting screws, which are supplied with 5mm nylon hole plugs.   To accommodate the body of the FMDP, you must allow for a MINIMUM recessed area of :  W 80mm, H 160mm, D 35mm.   Our FMDP unit also provides for the mounting of a digital camera. A camera hole with a perspex sealing plate are provided on the stainless steel face plate. Two threaded mounting studs are also provided on the rear of the plate to allow for mounting of the camera.   Due to the wide range of individual requirements a digital camera is not supplied with this product.             SURFACE MOUNT DOOR PHONE   Our SURFACE MOUNT DOOR PHONE (SMDP) device is designed to be fitted ONTO a wall surface.      The SMDP device is then located in place by using 2 mounting screws. The dimensions of this device are as follows :             DOOR PHONE COVER   Whenever  your  DOOR PHONE is not under cover, an optional PERSPEX DOOR PHONE COVER is essential to ensure that water from rain cannot gradually permeate through to the electronics of the Door Phone which can cause unreliable operation and can eventually lead to permanent failure of this device.   Our Door Phone Covers are made from strong 5mm transparent perspex. There are 3 models available :   Door Phone Cover for Surface Mount Door Phone                                                                                                  - Order Code is DPC-1. Door Phone Cover for Flush Mount Door Phone -  mounted Verticaly                                                                       - Order Code is DPC-2. Door Phone Cover for Flush Mount Door Phone -  mounted Horizontaly                                                                    - Order Code is DPC-3   . DOOR PHONE PERFORMANCE This product is IDEAL for RESIDENTIAL USE or COMMERCIAL USE, where ROAD NOISE is NOT HIGH. It is not designed for INDUSTRIAL USE where ambient noise can be constantly high. The volume of the audio communication on the internal phones should be comfortably audible (nearly as loud as a telephone call) providing : The person at the Door Phone is talking directly towards the Door Phone and at a distance of no more than 1 to 2 feet away (max 500-600 mm). The Door Phone is best mounted at a height of about 1.5 meters (5 feet). You can mount at a lower level to allow for very young children, but volume will suffer. No plates or other material should be placed over the front face of the Door phone. Our Door Phone Cover accessory, or a  properly designed Rain Hood will not affect performance. The volume of the audio communication at the Door Phone should be should be comfortably audible, providing : There is not excessive road noise or other noise near the Door Phone. This will affect the automatic gain circuit used in this device. That high quality ADSL FILTERING is fitted ahead of the DS CONTROLLER where ADSL is used on the same line. If you do not do so, volume in both directions will be affected. Refer to your Door Station Controller User Guide for detailed information on the use of ADSL with this product. A BALANCE POT is provided, which may need to be adjusted for the ‘noise level’ of your environment.