diff --git a/conf/rayo/autoload_configs/rayo.conf.xml b/conf/rayo/autoload_configs/rayo.conf.xml
index 52a1a35977..50af0f7ecd 100644
--- a/conf/rayo/autoload_configs/rayo.conf.xml
+++ b/conf/rayo/autoload_configs/rayo.conf.xml
@@ -26,6 +26,13 @@
 	<!-- Define CPA detectors.  These are sources for Rayo CPA signal events -->
 	<!-- Detectors must fire an event that can be translated by mod_rayo into a CPA signal event -->
 	<cpa>
+		<!-- map DTMF events to CPA -->
+		<detector name="core_dtmf_event">
+			<event class="DTMF" value-header="DTMF-Digit" duration-header="DTMF-Duration">
+				<signal-type value="dtmf"/>
+			</event>
+		</detector>
+
 		<!-- map mod_spandsp fax detector to the Rayo CPA events. Fires DETECTED_FAX_* event once and quits. -->
 		<detector name="mod_spandsp_fax_ced">
 			<start application="spandsp_start_fax_detect" data="event 'Event-Name=CUSTOM,Event-Subclass=DETECTED_FAX_CED' 500 ced"/>
diff --git a/src/mod/event_handlers/mod_rayo/conf/autoload_configs/rayo.conf.xml b/src/mod/event_handlers/mod_rayo/conf/autoload_configs/rayo.conf.xml
index 52a1a35977..50af0f7ecd 100644
--- a/src/mod/event_handlers/mod_rayo/conf/autoload_configs/rayo.conf.xml
+++ b/src/mod/event_handlers/mod_rayo/conf/autoload_configs/rayo.conf.xml
@@ -26,6 +26,13 @@
 	<!-- Define CPA detectors.  These are sources for Rayo CPA signal events -->
 	<!-- Detectors must fire an event that can be translated by mod_rayo into a CPA signal event -->
 	<cpa>
+		<!-- map DTMF events to CPA -->
+		<detector name="core_dtmf_event">
+			<event class="DTMF" value-header="DTMF-Digit" duration-header="DTMF-Duration">
+				<signal-type value="dtmf"/>
+			</event>
+		</detector>
+
 		<!-- map mod_spandsp fax detector to the Rayo CPA events. Fires DETECTED_FAX_* event once and quits. -->
 		<detector name="mod_spandsp_fax_ced">
 			<start application="spandsp_start_fax_detect" data="event 'Event-Name=CUSTOM,Event-Subclass=DETECTED_FAX_CED' 500 ced"/>
diff --git a/src/mod/event_handlers/mod_rayo/rayo_cpa_detector.c b/src/mod/event_handlers/mod_rayo/rayo_cpa_detector.c
index 27ce9a13be..ed1d87d152 100644
--- a/src/mod/event_handlers/mod_rayo/rayo_cpa_detector.c
+++ b/src/mod/event_handlers/mod_rayo/rayo_cpa_detector.c
@@ -79,8 +79,13 @@ struct rayo_cpa_detector_state {
 int rayo_cpa_detector_start(const char *call_uuid, const char *signal_ns, const char **error_detail)
 {
 	struct rayo_cpa_detector *detector = switch_core_hash_find(globals.detectors, signal_ns);
+	switch_core_session_t *session;
 	if (detector) {
-		switch_core_session_t *session = switch_core_session_locate(call_uuid);
+		if (zstr(detector->start_app)) {
+			/* nothing to do */
+			return 1;
+		}
+		session = switch_core_session_locate(call_uuid);
 		if (session) {
 			struct rayo_cpa_detector_state *detector_state = switch_channel_get_private(switch_core_session_get_channel(session), detector->uuid);
 			if (detector_state) {
@@ -114,8 +119,13 @@ int rayo_cpa_detector_start(const char *call_uuid, const char *signal_ns, const
 void rayo_cpa_detector_stop(const char *call_uuid, const char *signal_ns)
 {
 	struct rayo_cpa_detector *detector = switch_core_hash_find(globals.detectors, signal_ns);
+	switch_core_session_t *session;
 	if (detector) {
-		switch_core_session_t *session = switch_core_session_locate(call_uuid);
+		if (zstr(detector->stop_app)) {
+			/* nothing to do */
+			return;
+		}
+		session = switch_core_session_locate(call_uuid);
 		if (session) {
 			struct rayo_cpa_detector_state *detector_state = switch_channel_get_private(switch_core_session_get_channel(session), detector->uuid);
 			if (detector_state) {