Traffic engineering
Table 32: Completed COI matrix for Example 4: Expanded COI matrices
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| To endpoints in Site ___ |
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| 1 |
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| 2 |
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| 3 |
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| I | C | P |
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| I | C | P |
| I | C | P |
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| I |
| 12.7 | 7.5 | 0 |
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| 5.2 | 2.3 | 0 |
| 2.8 | 0.37 | 0 |
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___ | 1 | C |
| 7.5 | 4.4 | 0 |
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| 3.1 | 1.4 | 0 |
| 1.6 | 0.22 | 0 |
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| P |
| 30.9 | 18.1 | 0 |
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| 0 | 0 | 0 |
| 0 | 0 | 0 | |
Site |
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| 5.2 | 3.1 | 0 |
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| 1.9 | 0.85 | 0 |
| 1.2 | 0.16 | 0 | |
in |
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endpoints |
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2 | C |
| 2.3 | 1.4 | 0 |
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| 0.85 | 0.37 | 0 |
| 0.54 | 0.07 | 0 | |
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| P |
| 0 | 0 | 0 |
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| 12.5 | 5.5 | 0 |
| 0 | 0 | 0 |
From |
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| I |
| 2.8 | 1.6 | 0 |
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| 1.2 | 0.54 | 0 |
| 0.78 | 0.10 | 0 | |
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3 | C |
| 0.37 | 0.22 | 0 |
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| 0.16 | 0.07 | 0 |
| 0.10 | 0.01 | 0 | |
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| P |
| 0 | 0 | 0 |
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| 0 | 0 | 0 |
| 7.1 | 0.94 | 0 |
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The general formula that is used to determine the expanded inbound and outbound CUR entries in Table 32 is:
Inbound CUR to stations of type t in Site j over PSTN trunks in Site i
Outbound CUR from stations of type t in Site i over PSTN trunks in Site j
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| ⎛inbound CUR from trunks in Site i ⎞ |
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= | fj | ⋅ | ⎝ | to stations in Site j | ⎠ |
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| t |
| ⎛outbound CUR from stations in Site i ⎞ | |||
= | fi | ⋅ | ⎝ | to trunks in Site | j | ⎠ |
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where:
●“Type t” refers to IP or
●fi t
●fj t
= number of type t stations in Site i
total number of stations in Site i
= number of type t stations in Site j
total number of stations in Site j