
Chapter 1 Introduction 23
IP Telephony Configuration Guide
In the figure above, note that Business Communications Manager A is connected to a LAN
through a LAN card, to a WAN through a WAN card, and to a PSTN through trunk media bay
modules. Through these networks, the system accesses other systems and network equipment
connected to the network.
M1-ITG
The Meridian 1 Internet Telephony Gateway (M1-ITG) allows Meridian 1 systems to
communicate with the Business Communications Manager 3.0 via H.323 trunks. In Figure 1 on
page 22, telephones on the M1, such as Meridian telephone A, can initiate and receive calls with
the other telephones on the system across IP networks.
To provide fallback at times when IP traffic cannot pass, you can also connect the Meridian to the
Business Communications Managers through ISDN PRI SL-1 lines, which provide the same
MCDN capability that you can achieve through the VoIP trunks with MCDN active.
Refer to the Business Communications Manager Programming Operations Guide for a description
of MCDN features and networking with PRI SL-1 lines. “Typical network applications using
MCDN” on page 115 describes how to provide the same network over VoIP lines.
A Business Communications Manager connected to an M1-ITG using the MCDN protocol can
provide access to a central voice mail and call attendant systems, which can streamline
multi-office telephony administration.
Telephones
The Business Communications Manager 3.0 system can communicate using digital telephones
(M7000/T7000, T7100, M7100, M7100N, T7208, M7208, M7208N, T7316, M7310, M7310N,
M7324, and M7324N), cordless telephones (Companion, DECT, T7406), IP telephones and
applications (i2002, i2004, Nortel Networks i2050 Software Phone), and IP/wireless telephones
(NetVision and NetVision Data telephones). With this much flexibility, the Business
Communications Manager can provide the type of service you require to be most productive in
your business.
VoIP trunks and analog/digital telephones
While analog and digital telephones cannot be connected to the Business Communications
Manager 3.0 system with an IP connection, they can make and receive calls to and from other
systems through VoIP trunks. Calls received through the VoIP trunks to system telephones are
received through the LAN or WAN card and are translated within the Business Communications
Manager to voice channels.
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