Meridian America 21 Benutzerhandbuch
3-12 Provisioning guidelines
Step 3:
Calculate number of trunks required
Trunks required
The values obtained through any of the three previous methods should now
be entered on Worksheet A (provided at the end of this document).
be entered on Worksheet A (provided at the end of this document).
Add
your calculations to the worksheet. Once the trunk
is known, and a
grade of service has been specified by the customer, the number of trunks
required per trunk group to meet the cutover, 2-year and
requirements of a customer can be determined as follows:
required per trunk group to meet the cutover, 2-year and
requirements of a customer can be determined as follows:
Example
The customer requires a Poisson 1% blocking grade of service (see Table
3-A at the end of this document). The estimated trunk
3-A at the end of this document). The estimated trunk
is 1.14 for a
DID trunk group. With the cutover, 2-year and 5-year number of lines, the
total trunk CCS is determined by multiplying the number of lines by
total trunk CCS is determined by multiplying the number of lines by
Cutover 275 (lines) x 1.14 (trunk
313.5 CCS
2 year 304 (lines) x 1.14 (trunk
= 346.5 CCS
---
5 year 352 (lines) x 1.14 (trunk
= 401.28 CCS
Use Table 1 to determine the quantity of trunks required to meet the trunk
CCS at cutover, 2-year and
CCS at cutover, 2-year and
interval. In this case:
17 DID trunks are required at cutover
18 DID trunks are required at 2 years
21 DID trunk are required at 5
Note: For trunk traffic greater than 4427 ccs, allow 29.5
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