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IP Telephony Configuration Guide
Chapter 2
Prerequisites checklist
Before you set up VoIP trunks or IP telephones on a Business Communications Manager, complete
the following checklist to ensure that the system is set up properly. Some questions do not apply to
all installations.
Network diagram
To aid in installation a Network Diagram is needed to provide a basic understanding of how the
network is configured. Before you install VoIP functionality, you must have a network diagram
that captures all of the information described below. If you are configuring IP telephones but not IP
trunks, you do not need to answer 1.d and 1.e.
Table 1 Network diagram
Network devices
This section of the checklist contains questions about devices on the network such as firewalls,
NAT devices, and DHCP servers.
Prerequisites Yes No
1.a Has a network diagram been developed?
1.b Does the network diagram contain any routers, switches or bridges with
corresponding IP addresses and bandwidth values for WAN or LAN links?
1.c Does the network diagram contain IP Addresses and network locations of all BCMs?
1.d Answer this if your system will use IP trunks, otherwise, leave it blank: Does the
network diagram contain IP Addresses of any other Voice over IP gateways desired
to connect to?
1.e Answer this only if your system will use a gatekeeper, otherwise, leave it blank: Does
the network diagram contain alias for any Gatekeeper that may be used?
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