Northern Telecom 3X8 Owner's Handbook Manual page 58

User filter
The COS User filter replaces the telephone (set) filter or the
line/set filter that would otherwise apply to a specific call.
Use the button, the
pad to program the two-digit User filter. The default setting
means that any other filters in place (telephone (set)
filter or line/set filter) still apply.
Line filter
The COS Line filter replaces the line filter that would otherwise
apply to a specific call.
Use the display button, and the dial pad to program the
two-digit Line filter. The default setting
Line filter already programmed still applies.
PO84262701
Capabilities 53
display button, and the dial
means that any
DR5.1 Owner's Handbook