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ITG Engineering Guidelines Page 107 of
378
ITG Trunk 2.0 ISDN Signaling Link (ISL) Description, Installation and Operation
Insufficient link capacity
If there is not enough link capacity, one or more of the following options can
be decided:
• Use the G.723 codec series. Compared to the default
G.729 Annex AB codec with 30 ms payload, the G.723 codecs use 9% to
14% less bandwidth.
• Upgrade the link's bandwidth.
Other intranet resource considerations
Bottlenecks caused by non-WAN resources are less frequent. For a more
complete assessment you must consider the impact of incremental ITG traffic
on routers and LAN resources in the intranet. Perhaps the ITG traffic will
traverse LAN segments that are saturated, or routers whose CPU utilization
is high.