5.10.1.7. Affected Talk States 
As definition, the station DTMF signaling flag will be active only
in basic through-connect talk states, when a station device requires
the DTMF signal from it's local partner. This flag will be effective
while the station is in direct conversation with another device. For
this reason, it will be considered only in the mandatory talk states,
in which DTMF signaling is frequently used.
The DTMF mandatory talk states are:
- Basic A-B talk state.
- Both A or B Pty talk consultation mode.
- Consultation out of a conference.
- Camped-on talk state.
- 3-Pty and 4-Party conference talk state.
IMPORTANT:
Toggle after consulting out of conference. Toggle,and or 2nd. consultation will not be supported in conference scenarios for the DTMF in conference feature . These states may also represent conference talk states, but they will not be supported , in addition it does not make sense to toggle a call which has an IVR involved (this is the typical situation in which DTMF dialing is required).
For any other states (e.g: ACD Silent Monitoring) the DTMF signaling/dialing feature
is not
in effect.