Memory calculations 145
I=
the average number. of digits that must be
inserted as part of digit manipulation.
LGC=
number of on-net or virtual locations.
FCAS =
(N + 1) + N(M + 1) + MN[ 4 +
(1OOP
+ 15j/16]
where:
N = the number of defined FCAS tables
M = the average number of NPA codes per table
P = the average number of first digit of NXX codes
see
=
Number of entries in the SCC table.
SDRR = Number of supplemental digit restricted/recognized blocks
defined for NPA, NXX, LGC, SPN.
SDE = Average number of SDRR entries for each SDRR block.
. .
ITGE =
9 x ITEk where ITEI = the number of Incoming Trunk
Group Exclusion Index.
MDID =
(2 x number of total office codes) + (2 x number of total
DID ranges regardless of which office codes they belong
to). Maximum of 20 ranges or office codes can be defmed
per location code, (i.e., 1 office code and 20 ranges, or 20
office codes and 1 range for each office code).
BASICESN =
SIZE(ESN-DATA-BLOCK)
+
SIZE(NCTI-DATA-BLOCK)
129 +
305 = 434
. .
Memory calculations
553-2201-151 Appendix 1