Northern Telecom 3X8 Owner's Handbook Manual page 47

42 Capabilities
Filter descriptions
Filter 00 permits unrestricted dialing, and cannot be changed.
Filter 01 is pre-programmed with five restrictions and some
associated exceptions.
Filter Restrictions
Unrestricted dialing
00
01 0
1
I 9 1 1
4 1 1
976
None
02 24
Filters 02 and 03, although not pre-set with restrictions and
exceptions, are the default filter settings used later in
programming:
Where the filter is programmed as a default
Filter setting in Capabilities programming
0 2 S a t a b i l i t i e s
0 3
Line
Owner's Handbook
Exceptions
1 8 0 0
1 5 5 5
9 1 1
Set filter:
abilities Line filter:
01
P O 8 4 2 6 2 7