AT&T SYSTEM 25 Manual page 149

Trunk-Answer-from-Any-Station (TAAS) Night Service
With TAAS Night Service, calls are administered (on a per trunk basis) to activate an external
alerting device, such as a bell. Any user can dial the Night Service access code to answer the
call. Night Service delay announcement is not available for TAAS Night Service.
Using the Night Service Feature
To turn on Night Service:
To turn off this feature:
Typical Display:
Turning Night Service on or off does not affect the current display.
3-32 Attendant Features
Press
[ N I G H T ] .
The light next to this button turns on.
Press again.
[NIGHT]
The light next to this button turns off.