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DEFINITY ECS Release 8.2 ATM Installation,
Upgrades, and Administration
555-233-124
Issue 1
April 2000
Preparing for Installation and Upgrades
1-10Determine ATM Switch Suitability
1
Figure 1-3 shows an example of a calculation.
PROBABLY
means that this application is okay under any reasonable loads.
Check the constraint tests results to see what kind of loads might be a problem.
YES means that this application is okay under any load.
NO
means that this application is not reasonable. See the Constraint Tests results
to see what resource you are short of. See if you can increase this resource, or
decrease the number of port networks.
Table 1-3. Sample calculation
Network Layout
Customer
SV
ATM switch
AC120
Total number of DEFINITY port networks:
25
Number of PNs directly attached directly to this ATM switch:
12
Is the DEFINITY PPN directly attached to this ATM switch
(yes/no)
yes
Number of trunks on this ATM switch (inter-ATM-switch
connections)
1
Any transit traffic through this ATM switch (yes/no)
no
Aggregate peak phone calls rate per hour in all directly
connected PNs
10000
Bidirectional aggregate trunk bandwidth in Mbps
155.52
Application bandwidth in kbps needed per port network
128
ATM Switch Resource Limits
(see "Limits" sheet for help)
Number of PP SVCs supported:
1000
Number of PMP (roots) supported:
6250
Number of PMP parties (leaves) supported:
8334
Number of PMP endpoints (roots+leaves) supported:
1000000
Total number of SVCs (PP+PMP) supported
1000000
Per-port SVC limit (normally based on VCI range)
1000000
Setups per second at <220 ms per setup
1000000
Feasibility
PROBABLY
Bandwidth limited
2032 calls