Nortel 1140E User Manual page 16

Entering and editing text
When on a call, you can use the function keys (f1, f2, f3, f4, f5, f6, f7, and
f8) to control the telephone. Table 2 shows the function keys and their
associated action during telephone calls.
Table 2: USB keyboard function keys during telephone calls
Function key
f1
f2
f3
f4
f5
f6
f7
f8
16
Action
Go to Handsfree mode
Go to Headset mode
Place the current call on hold
Mute the current call
Volume up
Volume down
Copy
Quit