3Com NBX 100 Administrator's Manual page 155

2 Select the telephone or other device that you want to update and click
IP Settings.
3 Type the new values for IP Address, Subnet Mask, and Default Gateway
address in the text boxes. Click the Help button to see more information
about the dialog box fields.
4 Click OK.
5 Disconnect the device from the Call Processor subnetwork.
6 Connect the device to the new subnetwork as follows:
Connect a telephone or a single-port Analog Terminal Adapter to a
port on either a switch or hub that is connected to the new
subnetwork.
Plug a card into an NBX chassis that is connected to the new
subnetwork.
7 Reboot the device:
Remove power from a telephone or a single-port Analog Terminal
Adapter, and then reconnect it.
If the device is a card, it reboots automatically when you insert it into
the new chassis. You do not need to remove power to the chassis
when adding or removing cards.
When you change IP Settings, all current calls through this device are
terminated.
8 In the NBX NetSet utility, return to the IP Settings dialog box for the
device.
9 Verify that the IP settings that you entered are now reported by the
device.
CAUTION: If you have configured an NBX telephone for operation on a
subnetwork other than the Call Processor's subnetwork, and if you access
the Modify IP Settings dialog box to verify that the device settings are
correct, you must exit the dialog box by clicking the Cancel button. If you
click OK, the NBX system applies the IP settings in the Manually Assigned
IP Settings text boxes. By default, all of these fields contain 0.0.0.0, and if
you click OK, all of the IP settings for the telephone are set to 0.0.0.0,
and the telephone no longer works on the "remote" subnetwork.
Changing Device IP Settings 155