AT&T SYSTEM 25 User Manual page 7

The Switchhook (Recall, Flash)
The switchhook is the button(s) held down by the handset when
it rests in the handset holder on your voice terminal. Some
System 25 features require that you use the switchhook to signal
the system.
When you are instructed to press the switchhook, press the
button(s) down as far as it will go for approximately 1/2 second
and then release it. If the switchhook is released too soon, the
signal will not work. If you hold the switchhook down for too
long your call will be disconnected.
If you have a
NOTE:
voice terminal, you can press it instead of the
switchhook. These buttons send a timed signal to the
system, so disregard how long you hold down the
button.
If you want to hang up and place. another call right
away, be sure to hold down the switchhook for more
than two seconds. Do not use the
button to disconnect the call.
2
or
[RECALL] [FLASH]
[RECALL]
PI button on your
or
[FLASH]