diff --git a/src/mod/codecs/mod_ilbc/mod_ilbc.c b/src/mod/codecs/mod_ilbc/mod_ilbc.c
index dc69c5e2d3..660ba54426 100644
--- a/src/mod/codecs/mod_ilbc/mod_ilbc.c
+++ b/src/mod/codecs/mod_ilbc/mod_ilbc.c
@@ -190,7 +190,7 @@ static const switch_codec_implementation_t ilbc_8k_30ms_implementation = {
 		/*.codec_type */ SWITCH_CODEC_TYPE_AUDIO, 
 		/*.ianacode */ 97, 
 		/*.iananame */ "iLBC", 
-		/*.fmtp */ NULL,
+		/*.fmtp */ "mode=30",
 		/*.samples_per_second */ 8000, 
 		/*.bits_per_second */ NO_OF_BYTES_30MS*8*8000/BLOCKL_30MS,
 		/*.microseconds_per_frame */ 30000,
@@ -210,7 +210,7 @@ static const switch_codec_implementation_t ilbc_8k_20ms_implementation = {
 		/*.codec_type */ SWITCH_CODEC_TYPE_AUDIO, 
 		/*.ianacode */ 97, 
 		/*.iananame */ "iLBC", 
-		/*.fmtp */ NULL,
+		/*.fmtp */ "mode=20",
 		/*.samples_per_second */ 8000, 
 		/*.bits_per_second */ NO_OF_BYTES_20MS*8*8000/BLOCKL_20MS, 
 		/*.microseconds_per_frame */ 20000,
@@ -233,7 +233,7 @@ static const switch_codec_implementation_t ilbc_102_8k_30ms_implementation = {
 		/*.codec_type */ SWITCH_CODEC_TYPE_AUDIO, 
 		/*.ianacode */ 102, 
 		/*.iananame */ "iLBC", 
-		/*.fmtp */ NULL,
+		/*.fmtp */ "mode=30",
 		/*.samples_per_second */ 8000, 
 		/*.bits_per_second */ NO_OF_BYTES_30MS*8*8000/BLOCKL_30MS,
 		/*.microseconds_per_frame */ 30000,
@@ -253,7 +253,7 @@ static const switch_codec_implementation_t ilbc_102_8k_20ms_implementation = {
 		/*.codec_type */ SWITCH_CODEC_TYPE_AUDIO, 
 		/*.ianacode */ 102, 
 		/*.iananame */ "iLBC102", 
-		/*.fmtp */ NULL,
+		/*.fmtp */ "mode=20",
 		/*.samples_per_second */ 8000, 
 		/*.bits_per_second */ NO_OF_BYTES_20MS*8*8000/BLOCKL_20MS, 
 		/*.microseconds_per_frame */ 20000,
@@ -275,7 +275,7 @@ static const switch_codec_implementation_t ilbc_8k_20ms_nonext_implementation =
 		/*.codec_type */ SWITCH_CODEC_TYPE_AUDIO, 
 		/*.ianacode */ 97, 
 		/*.iananame */ "iLBC20ms",
-		/*.fmtp */ NULL,
+		/*.fmtp */ "mode=20",
 		/*.samples_per_second */ 8000, 
 		/*.bits_per_second */ NO_OF_BYTES_20MS*8*8000/BLOCKL_20MS, 
 		/*.microseconds_per_frame */ 20000,
diff --git a/src/switch_core.c b/src/switch_core.c
index 0c150a6c63..405d3d9136 100644
--- a/src/switch_core.c
+++ b/src/switch_core.c
@@ -809,6 +809,7 @@ SWITCH_DECLARE(switch_status_t) switch_core_codec_init(switch_codec_t *codec, ch
 {
 	const switch_codec_interface_t *codec_interface;
 	const switch_codec_implementation_t *iptr, *implementation = NULL;
+	char *mode = fmtp; 
 
 	assert(codec != NULL);
 	assert(codec_name != NULL);
@@ -820,6 +821,17 @@ SWITCH_DECLARE(switch_status_t) switch_core_codec_init(switch_codec_t *codec, ch
 		return SWITCH_STATUS_GENERR;
 	}
 
+	if (mode && strncasecmp(mode, "mode=", 5)) {
+		int mms;
+		mode += 5;
+		if (mode) {
+			mms = atoi(mode);
+			if (mms > 0 && mms < 120) {
+				ms = mms;
+			}
+		}
+	}
+	
     /* If no specific codec interval is requested opt for 20ms above all else because lots of stuff assumes it */
     if (!ms) {
         for (iptr = codec_interface->implementations; iptr; iptr = iptr->next) {