Meridian America 21, 51, 61, 71 Manual calculation of , c&t

3-8 Provisioning guidelines
Manual calculation of c&t
Normally, the customer can estimate the number of trunks required at
cutover and specify the grade of service to be maintained at the 2-year and
5-year period. (If not, the comparative method can be used).
The number of trunks can be read from the appropriate trunk&g table to
select the estimated usage on the trunk group. The number of lines at
cutover that are accessing the group are divided into the estimated usage.
The result is the CCS/r which can be used to estimate trunk requirements.
Manual calculation example:
- Line CCS/T = 6.2
- Trunk CCS/T = 4.1
- 2 Console = 30 CCS
Cutover
2 Years
5 Years
Line ccs = 275 x 6.2 = 1705
Trunk ccs = 275 x 4.1 = 1128
Subtotal = 2833
Console ccs = 30
Total system load = 2663
Line ccs = 304 x 6.2 = 1885
Trunkccs=304x4.1 =1247
Subtotal = 3132
Console ccs = 30
Total system load = 3162
Line ccs = 352 x 6.2 = 2183
Trunk ccs = 352 x 4.1 = 1444
Subtotal = 3627
Console ccs = 30
Total system load = 3657
System engineering 553-3001-151