Default Filters (North America) - Nortel BCM50 Configuration Manual

• Removing a restriction from a filter has no effect on the contents of other filters, even if the
restriction was copied to them.
• You cannot delete a filter. Removing the restrictions programmed on a filter makes it an
unrestricted filter but the filter itself is not removed.

Default filters (North America)

Filter 00 permits unrestricted dialing and cannot be changed.
Filter 01 is pre-programmed with 10 restrictions and some associated overrides. In Filter 01,
Restriction 02 and Override 001 allow long distance toll free calls.
The dialing string 911, which is the number for emergency assistance in North America, is
included as both a restriction and an override in Filter 01. This arrangement prevents anyone from
blocking calls for emergency assistance on lines or sets using the default filter.
Table 86 Default restriction filters
Filter Restrictions (denied)
00 Unrestricted dialing
01 01: 0
02: 1
03: 911
04: 411
05: 976
06: 1976
07: 1AAA976
01 08: 1900
09: 1AAA900
10: 5551212
02 - 99 No restrictions or exceptions programmed
Note: Default filters are loaded when the system is initialized. A cold
start restores the default filters.
Filters 02, 03, and 04, although not preset with restrictions and overrides, are the default filters in
these programming headings:
Chapter 52 Call security and remote access
Overrides
001: 1800
002: 1877
003: 1888
001: 911
Networking Configuration Guide
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