diff --git a/libs/freetdm/src/include/openzap.h b/libs/freetdm/src/include/openzap.h
index 44d54473ac..7052d8e17b 100644
--- a/libs/freetdm/src/include/openzap.h
+++ b/libs/freetdm/src/include/openzap.h
@@ -561,6 +561,7 @@ struct zap_span {
 	teletone_multi_tone_t tone_finder[ZAP_TONEMAP_INVALID+1];
 	zap_channel_t *channels[ZAP_MAX_CHANNELS_SPAN+1];
 	zio_channel_outgoing_call_t outgoing_call;
+	zio_channel_get_sig_status_t get_sig_status;
 	zio_channel_request_t channel_request;
 	zap_span_start_t start;
 	zap_span_stop_t stop;
@@ -680,6 +681,7 @@ OZ_DECLARE(zap_status_t) zap_fsk_data_add_mdmf(zap_fsk_data_state_t *state, zap_
 OZ_DECLARE(zap_status_t) zap_fsk_data_add_checksum(zap_fsk_data_state_t *state);
 OZ_DECLARE(zap_status_t) zap_fsk_data_add_sdmf(zap_fsk_data_state_t *state, const char *date, char *number);
 OZ_DECLARE(zap_status_t) zap_channel_outgoing_call(zap_channel_t *zchan);
+OZ_DECLARE(zap_status_t) zap_channel_get_sig_status(zap_channel_t *zchan, zap_channel_sig_status_t *status);
 OZ_DECLARE(void) zap_channel_rotate_tokens(zap_channel_t *zchan);
 OZ_DECLARE(void) zap_channel_clear_detected_tones(zap_channel_t *zchan);
 OZ_DECLARE(void) zap_channel_clear_needed_tones(zap_channel_t *zchan);
diff --git a/libs/freetdm/src/include/zap_types.h b/libs/freetdm/src/include/zap_types.h
index 3f6d477243..38b749c0d7 100644
--- a/libs/freetdm/src/include/zap_types.h
+++ b/libs/freetdm/src/include/zap_types.h
@@ -190,6 +190,8 @@ typedef enum {
 	/* The channel signaling link is ready and calls can be placed */
 	ZAP_SIG_STATE_UP
 } zap_channel_sig_status_t;
+#define SIGSTATUS_STRINGS "DOWN", "SUSPENDED", "UP"
+ZAP_STR2ENUM_P(zap_str2zap_channel_sig_status, zap_sig_status2str, zap_channel_sig_status_t)
 
 typedef enum {
 	ZAP_SIGEVENT_START,
@@ -208,10 +210,12 @@ typedef enum {
 	ZAP_SIGEVENT_COLLECTED_DIGIT,
 	ZAP_SIGEVENT_ADD_CALL,
 	ZAP_SIGEVENT_RESTART,
+	/* Signaling link status changed (D-chan up, down, R2 blocked etc) */
+	ZAP_SIGEVENT_SIGSTATUS_CHANGED,
 	ZAP_SIGEVENT_INVALID
 } zap_signal_event_t;
 #define SIGNAL_STRINGS "START", "STOP", "TRANSFER", "ANSWER", "UP", "FLASH", "PROGRESS", \
-		"PROGRESS_MEDIA", "NOTIFY", "TONE_DETECTED", "ALARM_TRAP", "ALARM_CLEAR", "MISC", "COLLECTED_DIGIT", "ADD_CALL", "RESTART", "INVALID"
+		"PROGRESS_MEDIA", "NOTIFY", "TONE_DETECTED", "ALARM_TRAP", "ALARM_CLEAR", "MISC", "COLLECTED_DIGIT", "ADD_CALL", "RESTART", "SIGLINK_CHANGED", "INVALID"
 ZAP_STR2ENUM_P(zap_str2zap_signal_event, zap_signal_event2str, zap_signal_event_t)
 
 typedef enum {
@@ -437,6 +441,7 @@ typedef zap_status_t (*zap_stream_handle_write_function_t) (zap_stream_handle_t
 
 #define ZIO_CHANNEL_REQUEST_ARGS (zap_span_t *span, uint32_t chan_id, zap_direction_t direction, zap_caller_data_t *caller_data, zap_channel_t **zchan)
 #define ZIO_CHANNEL_OUTGOING_CALL_ARGS (zap_channel_t *zchan)
+#define ZIO_CHANNEL_GET_SIG_STATUS_ARGS (zap_channel_t *zchan, zap_channel_sig_status_t *status)
 #define ZIO_SPAN_POLL_EVENT_ARGS (zap_span_t *span, uint32_t ms)
 #define ZIO_SPAN_NEXT_EVENT_ARGS (zap_span_t *span, zap_event_t **event)
 #define ZIO_SIGNAL_CB_ARGS (zap_sigmsg_t *sigmsg)
@@ -462,6 +467,7 @@ typedef zap_status_t (*zap_stream_handle_write_function_t) (zap_stream_handle_t
 
 typedef zap_status_t (*zio_channel_request_t) ZIO_CHANNEL_REQUEST_ARGS ;
 typedef zap_status_t (*zio_channel_outgoing_call_t) ZIO_CHANNEL_OUTGOING_CALL_ARGS ;
+typedef zap_status_t (*zio_channel_get_sig_status_t) ZIO_CHANNEL_GET_SIG_STATUS_ARGS;
 typedef zap_status_t (*zio_span_poll_event_t) ZIO_SPAN_POLL_EVENT_ARGS ;
 typedef zap_status_t (*zio_span_next_event_t) ZIO_SPAN_NEXT_EVENT_ARGS ;
 typedef zap_status_t (*zio_signal_cb_t) ZIO_SIGNAL_CB_ARGS ;
@@ -488,6 +494,7 @@ typedef zap_status_t (*zio_api_t) ZIO_API_ARGS ;
 
 #define ZIO_CHANNEL_REQUEST_FUNCTION(name) zap_status_t name ZIO_CHANNEL_REQUEST_ARGS
 #define ZIO_CHANNEL_OUTGOING_CALL_FUNCTION(name) zap_status_t name ZIO_CHANNEL_OUTGOING_CALL_ARGS
+#define ZIO_CHANNEL_GET_SIG_STATUS_FUNCTION(name) zap_status_t name ZIO_CHANNEL_GET_SIG_STATUS_ARGS
 #define ZIO_SPAN_POLL_EVENT_FUNCTION(name) zap_status_t name ZIO_SPAN_POLL_EVENT_ARGS
 #define ZIO_SPAN_NEXT_EVENT_FUNCTION(name) zap_status_t name ZIO_SPAN_NEXT_EVENT_ARGS
 #define ZIO_SIGNAL_CB_FUNCTION(name) zap_status_t name ZIO_SIGNAL_CB_ARGS
diff --git a/libs/freetdm/src/ozmod/ozmod_sangoma_boost/ozmod_sangoma_boost.c b/libs/freetdm/src/ozmod/ozmod_sangoma_boost/ozmod_sangoma_boost.c
index 5aafbf3734..59f17ab875 100644
--- a/libs/freetdm/src/ozmod/ozmod_sangoma_boost/ozmod_sangoma_boost.c
+++ b/libs/freetdm/src/ozmod/ozmod_sangoma_boost/ozmod_sangoma_boost.c
@@ -29,6 +29,13 @@
  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Contributors: 
+ *
+ * Moises Silva <moy@sangoma.com>
+ * David Yatzin <davidy@sangoma.com>
+ * Nenad Corbic <ncorbic@sangoma.com>
+ *
  */
 
 #include "openzap.h"
@@ -1506,10 +1513,30 @@ static BOOST_WRITE_MSG_FUNCTION(zap_boost_write_msg)
 
 static BOOST_SIG_STATUS_CB_FUNCTION(zap_boost_sig_status_change)
 {
-	/* TODO: Notify the upper layer of the signaling status change (via span signaling callback and a new msg type?) */
+	zap_sigmsg_t sig;
+	zap_sangoma_boost_data_t *sangoma_boost_data = zchan->span->signal_data;
+	zap_log(ZAP_LOG_DEBUG, "%d:%d Signaling link status changed to %s\n", zchan->span_id, zchan->chan_id, zap_sig_status2str(status));
+	
+	memset(&sig, 0, sizeof(sig));
+	sig.chan_id = zchan->chan_id;
+	sig.span_id = zchan->span_id;
+	sig.channel = zchan;
+	sig.event_id = ZAP_SIGEVENT_SIGSTATUS_CHANGED;
+	sig.raw_data = &status;
+	sig.raw_data_len = sizeof(status);
+	sangoma_boost_data->signal_cb(&sig);
 	return;
 }
 
+static ZIO_CHANNEL_GET_SIG_STATUS_FUNCTION(sangoma_boost_get_sig_status)
+{
+	zap_sangoma_boost_data_t *sangoma_boost_data = zchan->span->signal_data;
+	if (!sangoma_boost_data->sigmod) {
+		zap_log(ZAP_LOG_ERROR, "Cannot get signaling status in boost channel with no signaling module configured\n");
+		return ZAP_FAIL;
+	}
+	return sangoma_boost_data->sigmod->get_sig_status(zchan, status);
+}
 
 /**
  * \brief Initialises an sangoma boost span from configuration variables
@@ -1612,8 +1639,8 @@ static ZIO_SIG_CONFIGURE_FUNCTION(zap_sangoma_boost_configure_span)
 			FAIL_CONFIG_RETURN(ZAP_FAIL);
 		}
 		sigmod_iface->pvt = lib;
-		sigmod_iface->set_sig_status_cb(zap_boost_sig_status_change);
 		sigmod_iface->set_write_msg_cb(zap_boost_write_msg);
+		sigmod_iface->set_sig_status_cb(zap_boost_sig_status_change);
 		hashtable_insert(g_boost_modules_hash, (void *)sigmod_iface->name, sigmod_iface, HASHTABLE_FLAG_NONE);
 		lib = NULL; /* destroying the lib will be done when going down and NOT on FAIL_CONFIG_RETURN */
 	}
@@ -1642,6 +1669,7 @@ static ZIO_SIG_CONFIGURE_FUNCTION(zap_sangoma_boost_configure_span)
     span->signal_type = ZAP_SIGTYPE_SANGOMABOOST;
     span->outgoing_call = sangoma_boost_outgoing_call;
 	span->channel_request = sangoma_boost_channel_request;
+	span->get_sig_status = sangoma_boost_get_sig_status;
 	span->state_map = &boost_state_map;
 	zap_set_flag_locked(span, ZAP_SPAN_SUSPENDED);
 
diff --git a/libs/freetdm/src/zap_io.c b/libs/freetdm/src/zap_io.c
index 5141e2f524..3a623f3db7 100644
--- a/libs/freetdm/src/zap_io.c
+++ b/libs/freetdm/src/zap_io.c
@@ -1255,6 +1255,22 @@ OZ_DECLARE(zap_status_t) zap_channel_outgoing_call(zap_channel_t *zchan)
 	return ZAP_FAIL;
 }
 
+OZ_DECLARE(zap_status_t) zap_channel_get_sig_status(zap_channel_t *zchan, zap_channel_sig_status_t *sigstatus)
+{
+	zap_status_t status;
+
+	zap_assert(zchan != NULL, ZAP_FAIL, "Null channel\n");
+	zap_assert(sigstatus != NULL, ZAP_FAIL, "Null sig status");
+	
+	if (zchan->span->get_sig_status) {
+		status = zchan->span->get_sig_status(zchan, sigstatus);
+	} else {
+		zap_log(ZAP_LOG_ERROR, "get_sig_status method not implemented!\n");
+	}
+	
+	return ZAP_FAIL;
+}
+
 OZ_DECLARE(zap_status_t) zap_channel_done(zap_channel_t *zchan)
 {
 	assert(zchan != NULL);