Nortel BCM50 2.0, Руководство по установке

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Chapter 6 IP telephone overview 43
Telephony Device Installation Guide
The information under the following headings describes the various components of the system:
• “M1-IPT” on page 45
• “Telephones” on page 45
• “Gatekeepers on the network” on page 45
• “IP network” on page 46
• “Public Switched Telephone Network” on page 46
Figure 10 shows components of a BCM50 2.0 network configuration.
In this example, two BCM50 2.0 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 BCM50 2.0 systems use VoIP trunks through a common IP network to connect to the
Meridian (M1-IPT) system.