diff --git a/openbsc/include/openbsc/mncc.h b/openbsc/include/openbsc/mncc.h
index 16fa053..fbf3cab 100644
--- a/openbsc/include/openbsc/mncc.h
+++ b/openbsc/include/openbsc/mncc.h
@@ -88,6 +88,7 @@
 #define MNCC_LCHAN_MODIFY	0x0203
 
 #define GSM_TCHF_FRAME		0x0300
+#define GSM_TCHF_FRAME_EFR	0x0301
 
 #define GSM_MAX_FACILITY	128
 #define GSM_MAX_SSVERSION	128
diff --git a/openbsc/src/mncc.c b/openbsc/src/mncc.c
index a5efc73..f53b15d 100644
--- a/openbsc/src/mncc.c
+++ b/openbsc/src/mncc.c
@@ -83,7 +83,7 @@
 	{"MNCC_FRAME_DROP",	0x0202},
 	{"MNCC_LCHAN_MODIFY",	0x0203},
 
-	{"GSM_TRAU_FRAME",	0x0300},
+	{"GSM_TCH_FRAME",	0x0300},
 
 	{NULL, 0} };
 
diff --git a/openbsc/src/rtp_proxy.c b/openbsc/src/rtp_proxy.c
index f9207d6..5513497 100644
--- a/openbsc/src/rtp_proxy.c
+++ b/openbsc/src/rtp_proxy.c
@@ -82,6 +82,7 @@
 #define RTP_VERSION	2
 
 #define RTP_PT_GSM_FULL	3
+#define RTP_PT_GSM_EFR	97
 
 /* decode an rtp frame and create a new buffer with payload */
 static int rtp_decode(struct msgb *msg, u_int32_t callref, struct msgb **data)
@@ -152,6 +153,9 @@
 			return -EINVAL;
 		}
 		break;
+	case RTP_PT_GSM_EFR:
+		msg_type = GSM_TCHF_FRAME_EFR;
+		break;
 	default:
 		DEBUGPC(DMUX, "received RTP frame with unknown payload "
 			"type %d\n", rtph->payload_type);
@@ -196,6 +200,11 @@
 		payload_len = 33;
 		duration = 160;
 		break;
+	case GSM_TCHF_FRAME_EFR:
+		payload_type = RTP_PT_GSM_EFR;
+		payload_len = 31;
+		duration = 160;
+		break;
 	default:
 		DEBUGPC(DMUX, "unsupported message type %d\n",
 			frame->msg_type);