Broadband Telephony - 3Com 3C10111C - NBX 100 - Modular Exp Base Installation Manual

Broadband Telephony

system. Consult your 3Com NBX Voice-Authorized Partner or a
3Com-qualified service technician for assistance.
The specific configuration tasks required for setting up the link between
the Call Processor and the remote telephone depend on the type of
equipment and the Telco/ISP that you use. For help in selecting
equipment and configuring it, contact your 3Com NBX Voice-Authorized
Partner or a 3Com-qualified support technician.
After you enable low-bandwidth communication for a telephone,
complete the configuration of the low-bandwidth IP connection:
1 Use the telephone key pad to configure IP settings on the telephone. See
"Manually Configuring Telephone IP Settings"
information.
2 Configure the telephone in the configuration database of the Call
Processor.
NBX system software (release R4.2 and higher) supports Network Address
Port Translation (NAPT, also called NAT overloading). NAPT allows you to
put an NBX Telephone behind a device that applies network address
translation at a remote location, such as a home office, and connect to
the NBX call processor through an Internet connection. One typical
configuration is to connect a cable/DSL modem to a small office/home
office router that includes a firewall and Ethernet ports. You connect the
NBX Telephone directly to one of the Ethernet ports. Another option is
use the pcXset soft telephone application instead of an NBX Telephone.
This section summarizes the tasks you must complete to configure an
NBX Telephone for operation behind the NAPT device. Because the
configuration interface on each device varies, detailed procedures for
NAPT device configuration are beyond the scope of this document. For
information about configuring the NAPT device, see the documentation
for that device.
To add a broadband connected telephone behind a NAPT device:
1 Make sure the NBX system is set up for IP operations, either Standard IP
or IP On-the-Fly. If you are not using a VPN connection to establish access
Configuring IP Telephony
on page 157 for more
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