public function dtmf($digits, $leg = null)
    {
        $this->proxyToInterface()->dtmf(
            $this->id, $digits, $leg);
    }
public function dtmf($digits, $leg = null)
    {
        $this->proxyToInterface()->dtmf(
            $this->id, $digits, $leg);
    }
public function dtmf ( $ digits , $ leg = null ) { $ this -> proxyToInterface ( ) -> dtmf ( $ this -> id , $ digits , $ leg ) ; }
Send digits in this call

@param $digits
@param null $leg
Send digits in this call