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 follo wing option s 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 increment al ITG traffic
on routers and LAN reso u r ces in the intranet. Perh ap s th e I TG tr a ffi c will
traverse LAN segments that are saturated, or routers whose CPU utilization
is high.