User Manual

6 WHITE PAPER DECT DENSITY
ESTIMATED MAX. NUMBER OF UNITS PER LOCATION*
Large office environment
EU
DW Series
Americas
DW & SD Series
Contact Centre
When 90 % of the users spend
most of the time on calls
200 units 100 units
Offices
When up to 40 % of the
users call at the same time
360 units 180 units
*Location is defined as an open office environment which is not interfering with another
area using a DECT system.
Above mentioned numbers are estimates only. In practice many factors can influence the
real number of units per location e.g. wideband versus narrowband etc. Please refer to page
7 for instructions on how to increase DECT density.
Simultaneous users
There is a huge difference from company to company when it comes to
call utilization. In some companies only a few employees use the phone
at a time whereas the staff of busy contact centres are constantly on the
phone. The number of concurrent users plays a large role in determining
the number of possible DECT units at one location.
Ways of working
DECT headsets are “intelligent” because they adapt to the usage by
deploying different channels and increasing the transmission power the
further away they are from their base units. In other words: Office work
routines have an effect on the density of DECT devices. The more desk
workers who mainly stay at their desks, the more devices can be used
simultaneously.
The office layout
Open office space allows radio frequencies to travel more freely than office
space with angles, hallways, conference rooms and other obstacles. The
physical barriers do not necessarily stop radio signals but they can limit the
range and decrease the possible density of DECT units in the company.
The same applies to the types of building materials used. A solid, big
concrete wall limits the radio signals significantly more than glass
windows, for instance. On the other hand this can make it possible to use
more than one DECT system and increase the number of users.
The environment
No company is an island. Often there will be other companies or organi-
zations on the floors above or below. If these neighbours also use DECT
technology this may limit the number of units and decrease the range for
each user in your company.
Products deployed
DECT is an industry standard and all DECT-products must comply with
the relevant regulations and standards. However, there are differences
between the actual products like headsets, and this will also have an effect
on the maximum number of units deployed and their user range.
A guideline
At Sennheiser we have made a rough guideline for the maximum number
of DECT units that can be deployed at one location. However, as mentioned
above, certain considerations need to be taken into account when planning
the deployment of DECT technology.
Few simultaneous users
Office A
Dect system A
Office B
Dect system B
The DECT system in office A can be
influenced by the DECT system in office
B and the opposite.
Many simultaneous
users