
18 Engineering guidelines
Enterprise Edge 2.0 IP Telephony Configuration Guide P0911590 Issue 02
Table 1 LAN and WAN IP bandwidth usage per Enterprise Edge Gateway (loaded
to 36 CCS per port per hour) with silence compression on page 20 and Table 2 LAN
and WAN IP bandwidth usage per Enterprise Edge Gateway (loaded to 36 CCS per
port per hour) without silence compression on page 21 show the bandwidth use for
the different codecs. This data assumes that each port is complete to 36 CCS (Centi-
call-second). CCS is a channel or circuit occupied for 100 s. The worst case scenario
is 100% utilization, or 36 CCS. Engineering the network for worst case numbers
ensures that the network can handle peak traffic.
Multiple network interfaces
The Enterprise Edge can have more than one IP address. Figure 2 Multiple network
interfaces has three Enterprise Edge systems, each with more than one IP address
available. Define the IP address for the VoIP gateway in the Local Gateway table.
The other remote gateways use this address to communicate with the Enterprise
Edge VoIP Gateway.
Figure 2 Multiple network interfaces
Local Gateway IP
IP2
Remote Gateway Table
Remote Gateway
IP addresses
IP3 IP5
Remote Gateway Table
Remote Gateway
IP addresses
IP2 IP5
Local Gateway IP
IP3
Enterprise Edge 1
Local Gateway Table
Enterprise Edge 2
Local Gateway Table
Enterprise Edge 3
Local Gateway Table
Local Gateway IP
IP5
Remote Gateway Table
Remote Gateway
IP addresses
IP3 IP3
DN-C
DN-A DN-B
IP3
IP4
IP2
IP1
IP5
IP6IP7
LAN/WAN
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