Expert Documentation

Chapter 5
• Audio quality rate >95%
Precautions:
Clearly specify the zones of this type, avoid the common parts, rest rooms, stairs,
elevators and room angles/extremities. (Take into account the field level recommendations
relative to Full DECT).
3. Level 3
The coverage is good but some areas are probably in a shadow zone. Therefore cut-offs
and interference are to be expected.
The recommended commitment values for this level are:
• Call establishment success rate >90%
• Audio quality rate >85%
Precautions:
Clearly specify the zones of this type, taking into account the recommendations for field
level relative to DECT.
4. Level 4
The coverage is not guaranteed.
Work-around solutions are offered according to the customer's needs (case of rarely
frequented zones where the accessibility can be obtained by installing one-off solutions).
In the case where the customer has demands that exceed our own assessment, then
depending on the commercial context, we must:
• Either sell a pre-study that is more comprehensive, to better specify the
Alcatel-Lucent Enterprise level of commitment
• Or present two offers specifying the hypotheses version:
i. What Alcatel-Lucent Enterprise feels is sufficient
ii. What would be required to meet the customer's demands
When a results commitment is requested, we must:
• Avoid fixing the resources (number of base stations, etc.) as a more in-depth study
may enable us to reduce the number of base stations and, as a result, increase our
global margin
• Increase the assessment to cover the risk relative to the number of base stations
(5% if the requirements expression data are accurate and more in the case of
uncertainties)
Caution:
In all cases, do not make a results commitment for a site that has not been visited.
General Rules
Traffic Calculation Rules
Even though, in most cases today, the number of base stations is linked more to coverage
rather than traffic objectives, it is a good idea to make sure of the suitability of the customer's
capacity, in particular in the Full DECT case.
The calculations must be carried out zone by zone.
Reminder:
A zone is a space that is homogeneous regarding difficulty of coverage, traffic and the required quality
level
To calculate the number of possible close base stations (or terminals) as well as the traffic
when there is a reduction in the number of frequencies, refer to the document IBS NG : Rules
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