send_dtmf_sync
Description:
[ Version ( since = "1.6" ) ]
public bool send_dtmf_sync (string dtmf, Cancellable? cancellable = null) throws Error
  public bool send_dtmf_sync (string dtmf, Cancellable? cancellable = null) throws Error
Synchronously requests to send a DTMF tone the call.
Call objects can only be sent once.
The calling thread is blocked until an incoming call is ready. See send_dtmf for the asynchronous version of this method.
Parameters:
| this | 
           A Call.  | 
      
| dtmf | 
           the DMTF tone.  | 
      
| cancellable | 
           A Cancellable or   | 
      
Returns:
| 
           
  |