3Com NBX 100 Administrator's Manual - page 115
Dial Plan Configuration File Commands
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Example: These commands define the extension range for telephones as
100 through 449, for call park as 601 through 609, for Auto Attendants
as 500 through 599, for hunt groups as 450 through 499, and for
external lines as 600 through 799.
ExtensionRange Telephone 100 449
ExtensionRange Park 601 609
ExtensionRange Autoattendant 500 599
ExtensionRange HuntGroup 450 499
ExtensionRange External 600 799
CAUTION: Do not define extension ranges that overlap. The only
exception is Park, which must be within the External range.
ExternalSettings
Syntax
ExternalSettings szExternalKeysetPrefix
szFirstAutoDiscoverExtension szDefaultAutoExtension
Description Specifies settings for several aspects of external devices.
Arguments
szExternalKeysetPrefix
— The digits that are prepended to external calls
made in Keyset mode. This is used to determine the Class of Service (CoS)
for external calls made in Keyset mode. Typical values for this digit are 8,
9, or 0 (zero). This prefix is set to the appropriate number in each
country’s dial plan.
Example: In the default internal dial plan table, the digit 9 instructs the
system to connect the call to an external line. When a telephone has a
button mapped to an external device, and the user places a call using
that external device, the system prepends the
szExternalKeysetPrefix
digit
to the digits dialed by a user; then the system applies the dial plan tables
to determine call Class of Service.
szFirstAutoDiscoverExtension
— The first extension used when
autodiscovering external devices. This must be in the specified range of
lowest/highest external extensions.
The system assigns extensions starting with this number and
incrementing upward. For information on the Auto Discovery topic, see
“Using Auto Discovery for Initial System Configuration” in the
NBX Installation Guide.