Traffic engineering
Additional design criteria
●Each site is to have a suitable number of PSTN trunks (which terminate on PNs in Atlanta and Boston, and on the G350 Media Gateways in Cleveland).
●This is a general business application (for example, no Call Center agents), where the average usage per station is assumed to be 0.11 Erlangs, and the average call duration is assumed to be 200 seconds.
●Each site consists of a single Network Region, and all three Network Regions are interconnected in the sense of the IRCM matrix.
●
Preliminary calculations
Based on the assumption of 0.11 Erlangs per station, Table 24: Example 1 station usage by endpoint type on page 182 shows the total station usage for each station category in the system.
Table 24: Example 1 station usage by endpoint type
Endpoints |
| Atlanta | Boston | Cleveland |
|
| (Erlangs) | (Erlangs) | (Erlangs) |
|
|
|
|
|
DCP Telephones |
| 60 | 20 |
|
|
|
|
|
|
IP Telephones |
| 120 | 50 | 30 |
|
|
|
|
|
Analog stations |
| 12 | 2 |
|
|
|
|
|
|
Road Warriors |
| 3 |
|
|
|
|
|
|
|
Analog stations administered |
|
|
| 4 |
to G350 Media Gateways |
|
|
|
|
|
|
|
|
|
