AT&T SYSTEM 25 Manual page 159

S L A C
To use Position Busy, a system with a SLAC(s) must have either two attendant positions or
one position and a multiline voice terminal administered as a "backup." If the system has
two consoles, pressing POS BUSY on one console will make it inactive and cause most calls
in the common queue to be directed to the active console. If the system has one console with
an administered backup voice terminal, pressing POS BUSY will make the SLAC inactive, and
most calls from the common queue will be directed to the backup terminal.
A console in inactive mode can receive attendant PDC, DID, and DGC calls, and outgoing
calls can still be placed.
Activating and deactivating POS BUSY does not affect the current display.
DTAC and SLAC
Using the Position Busy Feature
To turn on Position Busy:
Press
The light next to this button turns on.
To turn off this feature:
Press
The light next to this button turns off.
3-42 Attendant Features
[POS BUSY].
again.
[POS BUSY]