The Erlang value for DAP C4710(E) and C4720(E) (12 radio channels), with blocking
probability of 0.5%, is 5.25.
Calculate the traffic density using the following formula:
One cell has 20 users: five average traffic and 15 low traffic. The load is: (5 x 0.15) + (15 x
0.05) = 1.5 Erlang
Therefore, one 12 channel DAP is sufficient for this cell.
System deployment
This section describes the basics of SIP DECT system deployment.
DECT Deployment Kit 2
The DECT Deployment Tool (deployment tool) determines cell centers and cell boundaries.
The DECT Deployment Kit 2 is shown in
Figure 12: Deployment Kit 2 and carrying case
on
page 41. For more information about the deployment kit, see the DeTeWe User Manual that
accompanies each kit.
Important:
If you use an older deployment tool that differs from the one in the following figure , see
on page 205.
Site planning and hardware deployment
40 SIP DECT Fundamentals
October 2012
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