
Chapter 1 Introduction 19
IP Telephony Configuration Guide
Creating the IP telephony network
This section explains the components of the Business Communications Manager 2.5 system and
the devices it interoperates to create a network. Figure 1 shows components of a Business
Communications Manager 2.5 network configuration.
Note that the two Business Communications Manager systems are connected both through a PSTN
connection and through a WAN connection. The WAN connection uses VoIP trunks. If the PSTN
connections use dedicated ISDN lines, the two systems have backup private networks to each
other. Both Business Communications Manager systems use VoIP trunks through a common
WAN to connect to the Meridian (M1-ITG) system.
Figure 1 Network diagram
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LAN B
LAN A
Internet
WAN
IP telephone A
NetVision
Router
Gatekeeper
Business Communications
Router
Business Communications
IP telephone B
M1-ITG
H 323 Device B
Meridian set A
I2050 telephone A
Digital telephone A
Manager A
Manager B
telephone
Access Point
(H 323 device A)
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