Siemens HiPath 3000 Series - Additional Parameters

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A31003-H3590-S100-7-7620, 06/2012
HiPath 3000/5000 V9, Service documentation
2-57
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Dynamic Configuration Rules
2.5.2.4 Additional Parameters
In order to calculate the number of points for a specific system, several additional parameters
are usually required. These parameters are described below.
● Factor F
Tln
(subscriber traffic factor):
As in Guideline 12TR3 for 700 ports or more, this rule of thumb assumes a station traffic
value P
Tln
= 0.15 Erl and four outgoing seizures per device during busy traffic hours. The
factor F
Tln
is used to achieve a certain flexibility in the underlying station traffic values and
seizures. In the case of international systems, in particular, a factor greater than 1 may be
appropriate in some circumstances (e.g., P
Tln
= 0.20 erl results in F
Tln
= 1.33). In general,
the following applies:
If the seizure value per terminal is not directly specified, F
Tln
can be determined via the re-
lationship to the 4 outgoing seizures indicated above (e.g., 3 seizures produce a value of
F
Tln
= 0.75).
● Factor F
Ltg
(trunk traffic factor) for traffic volume on trunks:
As in Guideline 12TR3, this rule of thumb assumes a line traffic value P
Ltg
= 0.8 Erl and
12.5 incoming seizures per B channel during busy traffic hours. The factor F
Ltg
is used to
achieve some flexibility in the underlying traffic values and seizures. A factor of less than
1 (for example, P
Ltg
=
0.5 Erl gives F
Ltg = 0.63) may be appropriate in some cases, especially
for systems that were over-dimensioned to create a virtually blockage-free system. In gen-
eral, the following applies:
● Factor F
VPL
(AC traffic factor) for traffic volume of an attendant console:
This rule of thumb assumes a traffic value at an active attendant P
VPL
= 0.8 Erl and 144
seizures during busy traffic hours. The factor F
VPL
is used to achieve some flexibility in the
underlying station traffic values and seizures. A factor of less than 1 may be appropriate,
especially for systems in which the attendant consoles were over-dimensioned. In general,
the following applies:
● Factor C for ACD utilization:
For ACD agents, the intensity of the utilization of this feature must also be taken into ac-
count. By default, it is assumed that an ACD agent handles 16 ACD calls per hour. If ap-
plications need to be configured with values that significantly exceed or fall below this de-
fault, the factor C can be used to specify the corresponding multiple of the value 16. For
example, TV advertising campaigns may incur values of up to ten times the norm.
P
Tln
0.15
F
Tln
=
BHCA
Tln
4
F
Tln
=
P
Ltg
0.8
F
Ltg
=
BHCA
Ltg
12.5
F
Ltg
=
P
VPL
0.8
F
VPL
=
BHCA
VPL
144
F
VPL
=