Samsung DECT 500 Installation And Programming Manual

Contents

Part 1: Site Survey and Overview of DECT Systems23Repeaters as Problem Solvers in Multi-Cell SystemsTypical problems with multi-cell systems are:• Missing radio coverage• Missing traffic capacityOne of the typical problems is lack of coverage even after the site survey showed noproblems. This could be because in multi-cell systems some of the cells may inter-fere with each other; the Base Station may not have been installed in exactly thesame location as the survey Base Station during the site survey; or when the buildingis busy (especially in the case of warehouses) shelving, racking and stored goodsmay influence the radio coverage.The radio coverage is not the same all year, as coverage may depend on humidity orbuilding material. Therefore, a DECT system must be installed with a security overlapbetween coverage areas which can cause a rise in overall installation costs.Repeaters are excellent tools for adjusting multi-cell installations: they are easy toinstall and move, as they need no cabling.Installation of Repeaters with External Directional AntennaThe Repeater can be installed with an external directional antenna so it can be usedto create radio coverage in a remote building or area (Figure 1.13). With a standardantenna, coverage can be extended to a distance of around 1,000 metres, but thismay be greater or less if a higher or lower gain antenna is used. This is useful wherecabling is not possible or too expensive to install (Figure 1.14).When the Repeater does not have to hand over, the Repeater can be programmed torepeat up to three traffic channels.Figure 1.13