Creating And Managing Bridged Extensions - 3Com NBX 100 Administrator's Manual

138 C 3: D
HAPTER EVICE
Creating and
Managing Bridged
Extensions
C
ONFIGURATION
NCP MAC address — Required only when the network has more than
one network call processor.
Telephone IP address — A private IP address matching the IP address
scheme on the LAN side of the NAPT device but outside of the DHCP
address range configured in the NAPT device. The telephone must
have a static IP address. For pcXset, this would be the IP address of the
computer.
NCP IP address — The IP address of the call processor that the phone
must communicate with. If you are not connecting to the network
through a VPN connection, the NBX system must have a public IP
address.
Subnet Mask — The address mask in use on the LAN side of the NAPT
device.
Default Gateway — The IP address of the NAPT device on the LAN.
For details on how to use the LUI utility, see
User Interface Utility"
4 Configure the NAPT device:
Use the device's user interface to map UDP ports 2093-2096 to the NBX
telephone IP address. These UDP ports are registered ports for NBX
operations. This mapping feature, known as virtual server, port mapping,
port range forwarding, or rules, is required to allow traffic to pass to and
from the NBX Telephone.
Bridged extensions allow you to have the extension of a primary
telephone appear on one or more secondary telephones. Most activities
associated with the extension can be performed on both the primary
telephone and any of the secondary telephones. However, you cannot
use a bridged extension on a secondary telephone to place a call.
On any NBX system, you can configure a maximum number of primary
telephones and a maximum number of bridged extension on primary
telephones. See
on page 359.
Table 24.
"Using the Telephone Local