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Configuring the 4300T
3 - 5
Configuration Guide For Station Side IP PBX Applications
Most private enterprise VoIP networks use an IP PBX at the corporate
headquarters location to provide voice switching between headquarters,
branch offices and the PSTN. The 4300T is used in these environments to
securely connect branch office employees to the IP PBX installed in the
corporate headquarters location.
The installation of an 4300T on the station side of an enterprise IP PBX is very
similar to the IP Centrex application above. The branch office is connected to
the corporate network using a private T1/E1 link connected directly to the
WAN port of the 4300T. The LAN port(s) of the 4300T are connected directly
to enterprise devices and/or Ethernet switches.
The IP PBX in the corporate headquarters location performs VoIP signaling
and the 4300T acts as a proxy for the voice devices installed at the branch
office. Please note that in the configuration the 4300T located at the
Headquarters location is acting as a WAN router only. The 4300Ts installed at
the brand offices perform the following functions in this application:
• WAN/LAN IP routing.
IP PBX
Gateway
4300T
4300T
4300T
PSTN
EM004
Headquarters
Branch Office Branch Office
T1
T1/FT1 T1/FT1