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Provisioning Page 95 of 544
Option 11C and 11C Mini Technical Reference Guide
Manual calculation
Normally, the customer can estimate the number of trunks required at cutover
and specify the grade of service to be maintained at two-year and five-year
periods (see Table 19). (If not, use the comparative method described on
page 93.)
The number of trunks can be read from the appropriate trunking table to select
the estimated usage on the trunk group. The number of lines that are accessing
the group at cutover are divided into the estimated usage. The result is the
CCS/T which can be used to estimate trunk requirements.
Example:
• Line CCS/T = 6.2
• Trunk CCS/T = 4.1
• 2 consoles = 30 CCS
Table 19
Example of manual calculation of CCS/T
Cutover Line CCS = 275 x 6.2 = 1705
Trunk CCS = 275 x 4.1 = 1128
Subtotal = 2833
Console CCS = 30
Total system load = 2863
2 years Line CCS = 304 x 6.2 = 1885
Trunk CCS = 304 x 4.1 = 1247
Subtotal = 3132
Console CCS = 30
Total system load = 3162
5 years Line CCS = 352 x 6.2 = 2183
Trunk CCS = 352 x 4.1 = 1444
Subtotal = 3627
Console CCS = 30
Total system load = 3657