revert part of 390e6713

src/switch_rtp.c

@@ -660,10 +660,7 @@ static handle_rfc2833_result_t handle_rfc2833(switch_rtp_t *rtp_session, switch_
 					rtp_session->dtmf_data.in_digit_ts = 0;
 					rtp_session->dtmf_data.in_digit_sanity = 0;
 					rtp_session->dtmf_data.in_digit_queued = 0;
-
-					if (!switch_rtp_test_flag(rtp_session, SWITCH_RTP_FLAG_USE_TIMER)) {
-						*do_cng = 1;
-					}
+					*do_cng = 1;
 				} else {
 					if (!switch_rtp_ready(rtp_session)) {
 						return RESULT_GOTO_END;
@@ -708,9 +705,7 @@ static handle_rfc2833_result_t handle_rfc2833(switch_rtp_t *rtp_session, switch_
 				return RESULT_GOTO_RECVFROM;
 			}
 		} else {
-			if (switch_rtp_test_flag(rtp_session, SWITCH_RTP_FLAG_USE_TIMER)) {
-				*do_cng = 1;
-			}
+			*do_cng = 1;
 			return RESULT_GOTO_TIMERCHECK;
 		}
 	}