
Engineering guidelines 17
P0911590 Issue 02 Enterprise Edge 2.0 IP Telephony Configuration Guide
Figure 1 IP Telephony network engineering process shows when the design and
planning decisions that must occur.
Figure 1 IP Telephony network engineering process
Enterprise Edge VoIP Gateway bandwidth engineering
Traffic controls the network design and the design process starts with the process
of getting an IP telephony bandwidth forecast. The bandwidth forecast drives the
following:
• LAN requirements (LAN must be great enough for the number of calls plus the
overhead)
• WAN requirements (WAN must be great enough for the number of calls plus
the overhead)
Implement
network changes
Further network
analysis or
design
Implement IP
telephony
Network
monitoring and
data collection
Measure
intranet QoS
Within Qos
expectations?
Within QoS
objectives?
Capacity
available?
Assess WAN
resources
Determine
bandwidth
requirements
Start
No
Yes
Yes
No
No
Yes
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