
66 Chapter 3 Installing IP telephones
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The system drops any active call on that telephone, and downloads a new firmware load into the
selected telephones. The telephones will be unusable until the download is complete and the
telephones have reset.
Note: In order not to saturate the IP network with download packets, the system will only
download up to five IP telephones at any given time. Telephones requiring download will show a
Unified Manager status of
Download Pending, and the UNISTIM Terminal Proxy Server
(UTPS) will initiate download as resources become available.
Deregistering DNs for IP telephones
You can deregister selected telephones from the Business Communications Manager, and force
the telephone to go through the registration process again.
There are two ways to deregister an IP telephone:
•use the Nortel IP Terminals Configuration menu (“Deregistering a telephone using the IP
record” on page 66)
•use the Configuration menu under one of the relevant headings under DN registration
(“Deregistering a telephone using a DN registration heading” on page 67)
Deregistering a telephone using the IP record
To deregister a DN for an IP telephone from the IP record:
1 In the Unified Manager, open Services, IP Telephony, IP Terminals, and click Nortel IP
Terminals.
The IP Terminal summary appears.
2 Click the IP Terminal Status tab.
3 Select the IP Terminal with the DN you want to deregister.
4 Open the Configuration menu, or alternate-click anywhere on the listing for the terminal to
display the menu, as shown in the next figure.
Warning: After this feature is activated, all active calls are dropped.
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