3Com SuperStack 3 NBX Administrator's Manual page 57

Table 9 provides a more detailed explanation of extension types, including
default extension ranges and values for 3-digit and 4-digit dial plans.
Table 9 Dial Plan Extension Settings
Field Purpose (See Notes 1 and 2)
Telephone The range of extensions for telephones.
Extensions Range
■
■
Length — This pull-down field specifies the number of digits for
telephone extensions.
Auto Attendant The range of extensions for Auto Attendants.
Extensions Range
Default:
SuperStack 3 NBX: 5500–5599
NBX 100: 500
For both 3-digit and 4-digit dial plans:
■
■
Default Auto Default extension that the NBX system assigns to the default
Attendant Auto Attendant. The Auto Discovery process assigns this
Extensions extension.
The system must direct each call coming in on an external line to
an extension. During the Auto Discovery of external lines
(analog lines and Digital Line Card channels), the NBX system
assigns the default extension (500) as the Auto Attendant
extension. After you import the dial plan configuration file and
complete the Auto Discovery process, you can manually
configure the extension for each analog line and each Digital
Line Card channel, if you want.
For both 3-digit and 4-digit dial plans:
■
■
Hunt Group The range of extensions for hunt groups.
Extensions Range
■
■
External The range of extensions that are connected to external devices,
Extensions Range such as Analog Line Card ports, Digital Line Card ports (BRI-S/T,
T1, E1, ISDN PRI), Call Park, and Paging extensions.
Default:
■
■
SuperStack 3 NBX: 1000–3999
NBX 100: 100–449
–
599
Extension 500 is reserved as the default Auto Attendant.
Extension 501 is reserved as the voice mail Auto Attendant.
Extension 500 is reserved as the default Auto Attendant.
Extension 501 is reserved as the voice mail Auto Attendant.
SuperStack 3 NBX: 4000–4099
NBX 100: 450–499 (maximum of 30 hunt groups)
SuperStack 3 NBX: 6000–7999
NBX 100: 600–799
Managing Extensions 57