diff --git a/src/mod/endpoints/mod_dingaling/mod_dingaling.c b/src/mod/endpoints/mod_dingaling/mod_dingaling.c
index a7476bb3fa..344828e2df 100644
--- a/src/mod/endpoints/mod_dingaling/mod_dingaling.c
+++ b/src/mod/endpoints/mod_dingaling/mod_dingaling.c
@@ -1280,17 +1280,19 @@ static switch_status_t channel_read_frame(switch_core_session_t *session, switch
 		}
 
 		if (tech_pvt->read_frame.datalen > 0) {
-			if (tech_pvt->read_codec.implementation->encoded_bytes_per_frame) {
-				bytes = tech_pvt->read_codec.implementation->encoded_bytes_per_frame;
-				frames = (tech_pvt->read_frame.datalen / bytes);
-			} else {
-				frames = 1;
-			}
-			samples = frames * tech_pvt->read_codec.implementation->samples_per_frame;
-			ms = frames * tech_pvt->read_codec.implementation->microseconds_per_frame;
-			tech_pvt->timestamp_recv += (int32_t) samples;
-			tech_pvt->read_frame.samples = (int) samples;
-			tech_pvt->last_read = tech_pvt->read_frame.datalen;
+            if (!switch_test_flag((&tech_pvt->read_frame), SFF_CNG)) {
+                if (tech_pvt->read_codec.implementation->encoded_bytes_per_frame && bytes) {
+                    bytes = tech_pvt->read_codec.implementation->encoded_bytes_per_frame;
+                    frames = (tech_pvt->read_frame.datalen / bytes);
+                } else {
+                    frames = 1;
+                }
+                samples = frames * tech_pvt->read_codec.implementation->samples_per_frame;
+                ms = frames * tech_pvt->read_codec.implementation->microseconds_per_frame;
+                tech_pvt->timestamp_recv += (int32_t) samples;
+                tech_pvt->read_frame.samples = (int) samples;
+                tech_pvt->last_read = tech_pvt->read_frame.datalen;
+            }
 			break;
 		}
 
diff --git a/src/mod/endpoints/mod_sofia/mod_sofia.c b/src/mod/endpoints/mod_sofia/mod_sofia.c
index 9cba1aea55..d1176a85d6 100644
--- a/src/mod/endpoints/mod_sofia/mod_sofia.c
+++ b/src/mod/endpoints/mod_sofia/mod_sofia.c
@@ -1614,9 +1614,12 @@ static switch_status_t sofia_read_frame(switch_core_session_t *session, switch_f
                 size_t bytes = 0;
                 int frames = 0;
 				//tech_pvt->last_read = switch_time_now();
-                bytes = tech_pvt->read_codec.implementation->encoded_bytes_per_frame;
-                frames = (tech_pvt->read_frame.datalen / bytes);
-				tech_pvt->read_frame.samples = (int) (frames * tech_pvt->read_codec.implementation->samples_per_frame);
+                if (!switch_test_flag((&tech_pvt->read_frame), SFF_CNG)) {
+                    if ((bytes = tech_pvt->read_codec.implementation->encoded_bytes_per_frame)) {
+                        frames = (tech_pvt->read_frame.datalen / bytes);
+                        tech_pvt->read_frame.samples = (int) (frames * tech_pvt->read_codec.implementation->samples_per_frame);
+                    }
+                }
 				break;
 			}
 		}
diff --git a/src/switch_rtp.c b/src/switch_rtp.c
index 706da89204..120c7d507a 100644
--- a/src/switch_rtp.c
+++ b/src/switch_rtp.c
@@ -782,7 +782,7 @@ static int rtp_common_read(switch_rtp_t *rtp_session, switch_payload_t *payload_
             *flags |= SFF_CNG;
             /* Return a CNG frame */
             *payload_type = SWITCH_RTP_CNG_PAYLOAD;
-            return SWITCH_RTP_CNG_PAYLOAD;
+            return SWITCH_RTP_CNG_PAYLOAD + rtp_header_len;
 		}
 
 		if (!switch_test_flag(rtp_session, SWITCH_RTP_FLAG_IO)) {
@@ -857,7 +857,7 @@ static int rtp_common_read(switch_rtp_t *rtp_session, switch_payload_t *payload_
 				*flags |= SFF_CNG;
 				/* Return a CNG frame */
 				*payload_type = SWITCH_RTP_CNG_PAYLOAD;
-				return SWITCH_RTP_CNG_PAYLOAD;
+				return SWITCH_RTP_CNG_PAYLOAD + rtp_header_len;
 			}
 		}