Northern Telecom 3X8 Owner's Handbook Manual page 45

40 Capabilities
Programming hints
can have up to 20 dialing filters (00 to 19).
Filter 00 cannot be changed.
Each programmable fitter can have up to 48 restrictions;
there is no limit on the number of exceptions that can be
allocated to any restriction.
There is a maximum of 200 restrictions and exceptions
allocated to the 24 programmable filters. For example, notice
the reduction in the number of available restrictions and
exceptions after each filter has been programmed.
User
Filter Rest'n Excpt'n Remaining
The maximum length for a restriction is 15 digits; for an
exception, the maximum is 16 digits.
DR5.1 Owner's Handbook PO84262701