3Com VCX V7000, Installation Manual

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26 C
HAPTER
1: P
RE
-I
NSTALLATION
G
UIDELINES
Gathering Site
Information
The VCX V7000 hardware servers communicate with each other using IP
addresses. These addresses must be dedicated (static) and must be
compatible with your network design.
The next sections describe the information you need to gather or decide
for each of these systems.
Using DNS 3Com recommends that customers configure DNS servers so that they
know the IP addresses and host names of all VCX servers and gateways.
3Com does not support NIS or WINS as domain name resolution methods
for VCX products.
Single Office
Configurations
VCX systems for single offices contain either two or four servers. Gather
the following information before you start installing the VCX system.
Two Servers
You must dedicate four IP addresses, one for each NIC (2 per server)
Four Servers
You must dedicate eight IP addresses, one for each NIC (2 per server)
Gateways
You must also dedicate IP addresses for use by the gateways:
■
Each analog gateway requires one IP address. There are two types of
analog gateways. FXS gateways connect to analog telephones and fax
machines. FX0 gateways connect to analog telephone lines provided
by the telephone company and enable the VCX system to make and
receive telephone calls over analog lines.
The 3Com V6000 (Analog) Integrated Branch Communications Platform
contains both FXO and FXS analog interfaces. (The V6100 does not.)
■
Each digital gateway with 8 or fewer T1/E1 spans requires one IP
address. Digital gateways enable the VCX system to make and receive
telephone calls over digital channels (T1/E1).
■
Each digital gateway with more than 8 T1/E1 spans requires two IP
addresses.