Creating The Ip Telephony Network - Nortel N0060609 Installation Manual

56 Chapter 8 IP telephony

Creating the IP telephony network

The following explains the components of the BCM system and the devices it interoperates with to
create a network.
The information under the following headings describes the various components of the system:
• "M1-IPT" on page 58
• "Telephones" on page 58
• "Gatekeepers on the network" on page 58
• "IP network" on page 59
• "Public Switched Telephone Network" on page 59
Figure 11 shows components of a BCM network configuration.
In this example, two BCM systems are connected both through a PSTN connection and through an
IP network connection. The IP network connection uses VoIP trunks. If the PSTN connections use
dedicated ISDN lines, the two systems have backup private networks to each other. Both BCM
systems use VoIP trunks through a common IP network to connect to the Meridian (M1-IPT)
system.
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