3Com NBX 100 Administrator's Manual - page 98
98
C
HAPTER
5: T
ELEPHONE
C
ONFIGURATION
have a static IP address. For the pcXset application, this is the IP
address of the computer.
■
Call Processor IP address — The IP address of the Call Processor with
which the telephone must communicate. If you are not connecting to
the network through a VPN connection, the 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 about how to use the LUI utility, see
“Using the Telephone
Local User Interface Utility”
on
page 413
.
4 Configure the NAPT device.
Use the device’s user interface to map UDP ports 2093-2096 to the 3Com
telephone IP address. These UDP ports are registered ports for system
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 3Com Telephone.
Creating and
Managing Bridged
Extensions
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 system, you can configure a maximum number of primary
telephones and a maximum number of bridged extensions on primary
telephones. See
Table 22
.
Table 22 Maximum Bridged Extensions
System
Device Limit
Maximum
Number of
Primary
Telephones
Maximum Number
of Bridged
Extensions on
Primary Phones
V3000
250
250
1200
V3000
More than 250
400
1200
V5000
250
250
1200
V5000
More than 250
400
1200