Avaya BCM 2.0 IP Telephony Manual de usuario descargar pdf (Pagina 25)

Engineering guidelines 25

P0911590 Issue 02 Enterprise Edge 2.0 IP Telephony Configuration Guide

Table 3 Link capacity

Some network management systems have network planning modules that

determine network flows. These modules provide more detailed and accurate

analysis as they can include correct node, link and routing information. They also

help the installer or administrator determine network strength by conducting link

and node failure analysis. By simulating failures, re-loading network and re-

computed routes, the modules indicate where the network can be out of capacity

during failures.

Not enough link capacity

If there is not enough link capacity, consider one or more of the following options:

• Use the G.723.1 codec. Compared to the default G.729 codec with 20 ms

payload, the G.723.1 codecs use 29% to 33% less bandwidth.

• Upgrade the link's bandwidth.

Other intranet resource considerations

Bottlenecks caused by non-WAN resources do not occur often. For a more

complete evaluation consider the impact of incremental IP telephony traffic on

routers and LAN resources in the intranet. The IP telephony traffic moves across

LAN segments that are saturated, or routers whose CPU utilization is high.

Link Utilization (%)

Available

capacity

kbit/s

Incremental IP telephony

load Enough

capacity?

End

Points

Capacity

kbit/s

Threshold Used Site pair Traffic

kbit/s

R1-R2 1536 85 75 154 Santa Clara/

Ottawa

Santa Clara/

Tokyo

15.5

Yes

R1-R3 1536

R2-R3 1536

R2-R4 1536

R4-R5 1536 85 48 568 Santa Clara/

Richardson

Ottawa/Tokyo

Santa Clara/

Tokyo

Yes

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