
Chapter 3 Installing IP telephones 67
IP Telephony Configuration Guide
Figure 13 Deregister DN from Configuration menu
5 Click Deregister DN.
6 Reregister the telephone, as described in “Configuring the i20XX telephones to the system” on
page 47.
Deregistering a telephone using a DN registration heading
To deregister a DN from a DN registration record:
1 In the Unified Manager, click the keys beside Services, System DNs, DN registration, IP set
DNs reg’d.
2 Click the key beside one of the following:
• Active, if you are deregistering an active IP telephone
• Inactive, if you are deregistering an inactive IP telephone.
3 Select the DN for the IP Terminal you want to deregister.
Warning: After this feature is activated, all active calls are dropped.
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