Traffic engineering

In addition, 37% of intercom calls that are generated in Site 1 are generated by circuit-switched stations, and 69% of those calls are terminated by IP stations. Since 69% of 37% is 25.5%, 25.5% of Site 1 to Site 2 intercom calls are circuit-switched station to IP station. Finally, 37% of intercom calls that are generated in Site 1 are generated by circuit-switched stations, and 31% of those calls are terminated by circuit-switched stations. Since 31% of 37% is 11.5%, 11.5% of Site 1 to Site 2 intercom calls are circuit-switched station to circuit-switched station.

So, since 43.5% of Site 1 to Site 2 intercom calls are IP station to IP station, Site 1 IP station to Site 2 IP station CUR is 43.5% of the 12 Erlangs of overall Site 1 to Site 2 intercom CUR, or 5.2 Erlangs. Similarly, the Site 1 IP station to Site 2 circuit-switched station CUR is equal to 19.5% of 12 Erlangs, or 2.3 Erlangs, and the Site 1 circuit-switched station to Site 2 IP station CUR is equal to 25.5% of 12 Erlangs, or 3.1 Erlangs. Finally, the Site 1 circuit-switched station to Site 2 circuit-switched station CUR is 11.5% of 12 Erlangs, or 1.4 Erlangs.

The values for the remaining COI cells that correspond to intercom traffic for this example are calculated in a similar manner. Table 31: COI matrix for Example 4: Expanded COI matrices (intercom CUR values only) summarizes the results of that exercise:

Table 31: COI matrix for Example 4: Expanded COI matrices (intercom CUR values only)

From endpoints in site ___

 

 

 

 

 

 

To endpoints in site ___

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

 

 

 

2

 

 

 

3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

I

C

P

 

 

I

C

P

 

I

C

P

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

I

 

12.7

7.5

 

 

 

5.2

2.3

 

 

2.8

0.37

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

C

 

7.5

4.4

 

 

 

3.1

1.4

 

 

1.6

0.22

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

P

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

I

 

5.2

3.1

 

 

 

1.9

0.85

 

 

1.2

0.16

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

C

 

2.3

1.4

 

 

 

0.85

0.37

 

 

0.54

0.07

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

P

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

I

 

2.8

1.6

 

 

 

1.2

0.54

 

 

0.78

0.10

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3

C

 

0.37

0.22

 

 

 

0.16

0.07

 

 

0.10

0.01

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

P

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

194 Avaya Application Solutions IP Telephony Deployment Guide

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Avaya 555-245-600 manual 12.7