Samsung DECT 500 Installation And Programming Manual

Contents

Part 1: Site Survey and Overview of DECT Systems3Environmental Considerations for Users and Buildingsy Carefully track the movement of users to establish movement patterns. The number ofBase Stations required is determined by the number of users and their movements.y The distance between Base Stations should be at least 3m to avoid interference. Keep thedistance between Base Stations shorter the more frequently users move while in conversa-tion.y Do not install a Base Station where it could spoil architectural features.y Consider ease of maintenance when installing a Base Station.Other Considerationsy There should be at least one Base Station with an RSSI (Receive Signal Strength Indicator)value greater than 65 hex and a “Q” value (bit error rate) greater than 52 at some locationwithin the service area for DECT users.y Take into account radio interference caused by objects such as trees, walls and glass. Tryto install in an open environment where masking by objects is minimised. Refer to Table 1for details.Table 1: Radio Interference by MaterialsMaterial Approximate Loss in dBGlass 2Glass, metal reinforced grid 10Glass, metal-clad sun guard 10Wall, indoor, wood 2Wall, brick, 10cm 3.5Wall, concrete, 15cm 9Wall, concrete, 20cm, large windows 6Wall, concrete, 40cm 17Concrete 15Concrete, metal clad 30Concrete, window 8–9Venetian blinds open 10Venetian blinds closed 20Soft partitioning 3–4y When installing cables for Base Stations, keep them away from high-speed LAN cables andpower cables which can cause electrical interference. Maintain at least 1m distance.y Avoid installing a Base Station near windows since radio interference between floors of abuilding might be more active due to diffraction of radio waves.y It is recommended that a Base Station should be installed at a distance of 2m from the floorand 30cm from the ceiling, and cables should come from the ceiling rather than the floor.