
48 Chapter 3 Installing IP telephones
P0937663 03.1
4 If the new location is on a different LAN or WAN from the old location, the subnet mask,
default gateway IP, S1 IP, and S2 IP may change. If this is the case, you must change the
settings for the telephone. To do this, see “Connecting the i2002 or i2004 telephone” on page
35. Do not change the Set IP Address.
To move a Nortel IP telephone and change the DN:
1 Deregister the DN, using the instructions in “Deregistering DNs for IP telephones” on page
45.
2 Disconnect the network connection and the power connection from the telephone.
3 Reinstall the phone at the new location. For information about this, see “Connecting the i2002
or i2004 telephone” on page 35.
Keep DN alive
This feature is only relevant to the i-series IP telephones (Model i2004/i2002/i2050).
If you want to retain DN-specific features such as Call Forward No answer and Call Forward on
Busy if an IP telephone becomes disconnected, you must ensure the following setting is set to Y.
1 Find the DN record for the IP telephone.
2 Click the Capabilities heading.
3 Beside the Keep DN alive field, choose Y.
Choosing N for this field allows the DN record to become inactive if the IP telephone is
disconnected. This produces a
Not in Service
prompt if any of the special features, such as
Call Forward, are invoked.
Warning: If the system is reset while an IP telephone is disconnected, the Keep DN alive
feature becomes inactive until the telephone is reconnected.
Note: When an IP telephone is disconnected, there is about a 40-second delay before the
system activates Keep DN alive during which incoming calls will either get a busy signal
or be rerouted to the Prime set, depending on how your system is programmed. The same
type of delay occurs when the IP telephone is reconnected to the system.
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