Lucent Technologies PARTNER Advanced Communications System Programming And Use Instructions page 374

Feature Reference
All of the system and telephone programming settings that were in effect
before the power failure or down period are retained (except those
mentioned in the "Related Features" section above); they do not revert to
the default settings.
Using
(See Figure 2-3 on page 2-22 for the location of special programming buttons such
s
as
To reset the system, press
at extension 10 or 11.
A display similar to the following appears:
Reset - Save All
When the reset is completed, the system is no longer in Programming Mode and
the date and time appear on the display.
5-264
e
and on system phones.)
f 0 0 s s # 7 2 8