
26 Chapter 1 Introduction
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Digital telephone A sends a request to the gatekeeper. The gatekeeper, depending on how it is
programmed, provides Digital telephone A with the information it needs to contact BCM B over
the network. Business Communications Manager B then passes the call to IP telephone B. SIP
trunks do not use gatekeepers.
The Business Communications Manager does not contain a gatekeeper application. If you want to
put a gatekeeper on your network, it must be put on a separate gatekeeper server. The Business
Communications Manager is compatible with RadVision, CSE 1000 (CSE1K), and NetCentrex
gatekeepers. Refer to “Using a gatekeeper” on page 133 and Appendix D, “Interoperability,” on
page 175.
IP network
In the network shown in Figure 1 on page 24, several LANs and a WAN are shown. When
planning your network, be sure to consider all requirements for a data network. Your network
administrator should be able to advise you about the network setup and how the Business
Communications Manager fits into the network.
WAN
A Wide Area Network (WAN) is a communications network that covers a wide geographic area,
such as state or country. For Business Communications Manager, a WAN is any IP network
connected to a WAN card on the Business Communications Manager system. This may also be a
direct connection to another Business Communications Manager system.
If you want to deploy IP telephones or NetVision telephones that will be connected to a LAN
outside of the LAN that the Business Communications Manager is installed on, you must ensure
the Business Communications Manager has a WAN connection. This includes ensuring that you
obtain IP addresses and routing information that allows the remote telephones to find the Business
Communications Manager, and vice versa.
The Programming Operations Guide has a data section that describes the internet protocols and
data settings that the Business Communications Manager requires or is compatible with. Ensure
that this connection is correctly set up and working before you attempt to deploy any remote IP
devices.
LAN
A Local Area Network (LAN) is a communications network that serves users within a confined
geographical area. For Business Communications Manager, a LAN is any IP network connected to
a LAN card on the Business Communications Manager system. Often, the LAN can include a
router that forms a connection to the Internet. A Business Communications Manager can have up
to two LAN connections.
Warning: Meridian 1 IPT does not support the RadVision gatekeeper.
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