Nortel 1000 Features And Services Fundamentals page 512

512 CLASS: Calling Number and Name Delivery
One XCMC pack serving a 3-5 group system Chances of groups larger
than three requiring special engineering are slim, since the threshold
9 "Maximum CLASS sets per group (based on inter-group junctor capacity
limitation)" (page
If the rule of co-locating CLASS sets and CMOD units in the same group
is not fully met, as long as basic rule like putting XCMC pack in the group
with most CLASS sets is followed, perhaps, no re-configuration between
any two groups is necessary.
However, if in doubt, isolate any two groups at one time, and go through the
two-group engineering procedure to re-configure the system two groups at
a time. Ignore the rest of system during the engineering process, except for
calculating the total number of CMOD units, which should cover the need of
all CLASS sets in the system. However, during a two-group engineering,
only the number of CMOD units attributable to the two-group at hand should
be used in calculations.
Also remember to use 2933 (equivalent) sets per group for threshold
check-off for the three-group system, and their respective number for four-
and five-group systems
on inter-group junctor capacity limitation)" (page
The complete check-off of set threshold between any two groups in a
multi-group system can be represented by the following combinations (a
number denotes the group number: for example, 1-2 represents group
one-group 2):
three-group: 1-2, 1-3, 2-3.
four-group: 1-2, 1-3, 1-4, 2-3, 2-4, 3-4.
five-group: 1-2, 1-3, 1-4, 1-5, 2-3, 2-4, 2-5, 3-4, 3-5, 4-5.
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.
Move 100 CLASS sets and 400 incoming trunks from group 0 to group
1; all above 3 violations are removed by this re-configuration: (1)
CLASS sets in group 0 is 100, (2) 400 CLASS agent sets and 400
incoming trunks with COI are in the same group (group 1), (3) the
number of equivalent sets in group 1 for threshold check-off is reduced
to 640 (=100+60x4+300=640) which is certainly within the limit (1760).
However, it is impractical to put almost all trunks and agent sets in
one group (group 1). With so many rule violations, the most realistic
approach is to move 200 CLASS agent sets to group 0 and equip
approximately 15 CMOD units in group 0 and 12 units in group 1.
503)) limiting the number of sets per group is much higher.
(Table 9 "Maximum CLASS sets per group (based
Nortel Communication Server 1000
Features and Services Fundamentals — Book 2 of 6 (C)
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503)).
(Table