User manual PLANTRONICS WIRELESS DENSITY WHITE PAPER

[. . . ] It is for that reason that Plantronics strongly recommend a site survey for customers interested in deploying more than 70 wireless headsets. Please contact Plantronics engineering for any proposed deployments of more than 70 headsets on a single site. As general guidance, 70 headsets can normally be deployed without problems. [. . . ] So compared to Bluetooth, it is possible to deploy many more DECT wireless systems. 1: Number of CONCURENT users. The maximum number of concurrent users in a `given area' (something we will come back to) is 70, given the number of channels available. Of course, in a typical office, not everyone is on the phone the whole time. So in simple terms, if call utilisation is 50%, the number of users approximately doubles. This might suggest that if call utilisation is just 20%, 350 users are possible. Unfortunately, it is not quite that simple. Each headset (whether in use of not) does take up a part of the available channels. As such, the larger the number of headsets in a given area, the fewer channels available for calls. However, the effects of this are relatively small up to 120 headsets. 2: The building layout & design No office is alike. Some are split into sections, broken up by meeting rooms, walls and open space. These physical barriers get in the way of wireless signals, but don't stop them. And it is the extent of interference between areas in a building that impacts density. If areas are completely separate from a wireless signal perspective, you can have 70 in each assuming 100% call utilisation. Or 120 in each assuming up to 50% call utilisation. The layout, material and many other facts can have a big impact on the extent to which wireless signals travel through a building. [. . . ] Plantronics Voyager headsets use Adaptive Frequency Hopping (AFH) designed to reduce interference from 802. 11 WiFi systems. This system works well with just one or two 802. 11 base stations (access points) in the vicinity, though short bursts of interference may occur. Where more than two WiFi access points are in operation within the same area, operation of the Voyager 510 may be subject to interference. [. . . ]