11.2.6. Examples for Determination of Weights 
The combined use of access point/OpenScape 4000 SoftGate weighting,
threshold settings for group switchover and, if necessary, exemption
from the group rule through individual switchover, form a powerful instrument
for configuring automatic switchover to the emergency mode. The following
two examples should help you to understand the calculations.
- Basic IP system (with no shelves in slots 1-15) with the communication server located at the computer center and 30 access points/OpenScape 4000 SoftGates, 1 CC-AP/Survivable OpenScape 4000 SoftGate at the backup computer center, and multiple trunk connections with the same code distributed on four access points/OpenScape 4000 SoftGates.
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Sample configuration 1 (Emergency mode in the case of complete failure of the communication server only, i.e. the connection from all access points/OpenScape 4000 SoftGates to the server has been lost)
- 1 emergency group, threshold = 300
- Weight of each of the 30 access points/OpenScape 4000 SoftGates = 10
Disadvantage: If only one access point/OpenScape 4000 SoftGate is not available, for example as a result of a power failure, it is excluded from the calculation since it does not have any contact with the CC-AP/Survivable OpenScape 4000 SoftGate. In such a scenario, the threshold cannot be reached.Sample configuration 2 (If the connection between the communication server and more than half of the access points/OpenScape 4000 SoftGates is lost, the system switches to emergency mode. This also applies if the same occurs with more than half of the trunk connections).- 1 emergency group, threshold = 150
- Access points/OpenScape 4000 SoftGates without a trunk connection: Weight = 10
- Access points/OpenScape 4000 SoftGates with a trunk connection: Weight = 75
- Conventional system at main location, branch 1 with 3 access points/OpenScape 4000 SoftGates one of which has a trunk connection; branch 2 with 6 access points/OpenScape 4000 SoftGates, two of which have a trunk connection; branch 3 with 1 access point/OpenScape 4000 SoftGate, which also has a trunk connection; branch 4 has 4 access points/OpenScape 4000 SoftGates, one of which has a general trunk connection and another which contains the ports for the executive management with a separate trunk connection. Connectivity via a local trunk connection is very important for the branches. If a single access point/OpenScape 4000 SoftGate without a trunk connection “fails“, this should not lead to a change of group. If, however, two or more access points/OpenScape 4000 SoftGates fail, the group must be changed. Each location has an individual access point/OpenScape 4000 SoftGate equipped with CC-AP/Survivable OpenScape 4000 SoftGate.
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Sample configuration Branch 1 (3 access points/OpenScape 4000 SoftGates)
- 1 emergency group, threshold = 200
- Access points/OpenScape 4000 SoftGates without a trunk connection: Weight = 100
- Access point/OpenScape 4000 SoftGate with a trunk connection: Weight = 200
Branch 2 (6 access points/OpenScape 4000 SoftGates)- 1 emergency group, threshold = 200
- Access points/OpenScape 4000 SoftGates without a trunk connection: Weight = 100
- Access points/OpenScape 4000 SoftGates with a trunk connection: Weight = 100
Branch 3- 1 emergency group, threshold = 100
- Access points/OpenScape 4000 SoftGates: Weight = 100
Branch 4- 1 emergency group, threshold = 200
- Access points/OpenScape 4000 SoftGates without a trunk connection: Weight = 100
- access point/OpenScape 4000 SoftGate with a trunk connection: Weight = 200
- Executive access point/OpenScape 4000 SoftGate: Weight = 100, individual switchover active The CC-AP/Survivable OpenScape 4000 SoftGate should be integrated in this access point/OpenScape 4000 SoftGate.