This function key is used to send alternating DTMF sequences in an active call, for example to implement a Push To Talk button.
If the key is pressed the DTMF digits assigned to the current state are sent and the state is switched to the alternate state.
If there is no active call the key is ignored.
State 0 - Number
- DTMF digits to send when key is pressed in State 0.
State 1 - Number
- DTMF digits to send when key is pressed in State 1.
Toggle on Press and Release
- Perform State 0 action when the key is pressed and State 1 action when key is released (doesn't work with keys on extension modules)