
Chapter 1 Introduction 21
IP Telephony Configuration Guide
Figure 1 Network diagram
Business Communications Manager
The Business Communications Manager is a key building block in creating your network. It
interoperates with many devices including the M1 and any H.323 device. In this network diagram,
the Business Communications Manager system is connected to devices through multiple IP
networks as well as the PSTN. Multiple Business Communications Manager systems can be linked
together on a network.
In Figure 1: Network diagram on page 21, BCM A is connected to a LAN (via a LAN card), a
WAN (via a WAN card), and a PSTN (via Media Bay Modules). Through these networks, the
system accesses other systems and network equipment connected to the network.
Inspect FO
RW
ARD Ca
llers
MX
P
In
spect FO
RWA
RD Callers
MXP
PSTN
LAN B
LAN A
Internet
WAN
IP set A
H.323 Device A
Router
Router
Gatekeeper
Norstar set A
BCM A
Router
BCM B
IP set B
M1-ITG
H 323 Device B
Meridian set A
I2050 set A
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