3com SuperStack 3 NBX Manual De Usuario

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Managing Extensions
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recommends that you take advantage of the Auto Discovery process. For 
instructions on using the Auto Discovery process or manually adding and 
configuring a new telephone, see the section on 
.
You can define a user in the system database without assigning a telephone 
to that user. By defining a user with no device, but with a telephone 
extension only, you create a phantom mailbox. The NBX system associates 
an extension with this phantom mailbox so that the user can have voice 
mail capability. To access voice mail from any telephone, the user calls 
either extension 500 (the default Auto Attendant extension), or 501 (the 
default Auto Attendant voice mail extension.)
Telephones and Line Card ports reserve most of the extensions within the 
system. However, there are other extensions within the system. 
 
shows the default extension ranges for 3-digit and 4-digit dial plans.
Modifying Extensions
You can modify the extension number of any device in the system. 
Normally, you make changes only after you have changed the extension 
ranges for the NBX system, in order to align the extensions with the new 
ranges.
CAUTION: Be very careful when you change extensions. The system does 
not validate changes that you make here, and there is no 
Undo or Cancel 
function. A mistake can compromise the operation of the system.
To modify extensions:
From the NBX NetSet main menu, click Dial Plan > Operations > Modify 
Extensions to open the Modify Extensions dialog box.
In the extensions list, select the extensions that you want to modify. Use 
Shift-click to select a block of extensions or Ctrl-click to select several 
extensions at different locations in the list.
Select an operation from the Operation drop-down list. 
 lists and 
describes the operations.
Make the appropriate entry in the text box to the right of the Operation 
list. The system uses this number in conjunction with the operation that 
you selected in step 3. For examples, see 
Click Apply. If the requested change creates a duplicate extension or an 
extension of zero length, the change is discarded.
Click OK to enable your changes and exit the dialog box.