diff --git a/TODO-RELEASE b/TODO-RELEASE
index 964ffe1..ea29b6a 100644
--- a/TODO-RELEASE
+++ b/TODO-RELEASE
@@ -38,3 +38,4 @@
 libosmo-mgcp-client	deprecate public API	New code should no longer use codecs[], instead use ptmap[].codec. There
 						is backwards compat code that moves codecs[] entries, if any, over to
 						ptmap[], so callers may migrate at own leisure.
+osmo-mgw		remove cfg		Remove VTY config item 'sdp audio fmtp-extra' (see OS#6313)
diff --git a/include/osmocom/mgcp/mgcp_network.h b/include/osmocom/mgcp/mgcp_network.h
index e95907d..a7bd333 100644
--- a/include/osmocom/mgcp/mgcp_network.h
+++ b/include/osmocom/mgcp/mgcp_network.h
@@ -108,7 +108,6 @@
 	int  frames_per_packet;
 	uint32_t packet_duration_ms;
 	int maximum_packet_time; /* -1: not set */
-	char *fmtp_extra;
 	/* are we transmitting packets (true) or dropping (false) outbound packets */
 	bool output_enabled;
 	/* FIXME: This parameter can be set + printed, but is nowhere used! */
diff --git a/include/osmocom/mgcp/mgcp_trunk.h b/include/osmocom/mgcp/mgcp_trunk.h
index e608161..1679239 100644
--- a/include/osmocom/mgcp/mgcp_trunk.h
+++ b/include/osmocom/mgcp/mgcp_trunk.h
@@ -27,7 +27,6 @@
 	unsigned int trunk_nr;
 	enum mgcp_trunk_type trunk_type;
 
-	char *audio_fmtp_extra;
 	int audio_send_ptime;
 	int audio_send_name;
 
diff --git a/src/libosmo-mgcp/mgcp_conn.c b/src/libosmo-mgcp/mgcp_conn.c
index 283a213..d9bc573 100644
--- a/src/libosmo-mgcp/mgcp_conn.c
+++ b/src/libosmo-mgcp/mgcp_conn.c
@@ -110,8 +110,6 @@
 	end->rtcp.fd = -1;
 	memset(&end->addr, 0, sizeof(end->addr));
 	end->rtcp_port = 0;
-	talloc_free(end->fmtp_extra);
-	end->fmtp_extra = NULL;
 
 	/* Set default values */
 	end->frames_per_packet = 0;	/* unknown */
diff --git a/src/libosmo-mgcp/mgcp_protocol.c b/src/libosmo-mgcp/mgcp_protocol.c
index 2249a98..ac5c682 100644
--- a/src/libosmo-mgcp/mgcp_protocol.c
+++ b/src/libosmo-mgcp/mgcp_protocol.c
@@ -1076,9 +1076,6 @@
 		rc = mgcp_conn_iuup_init(conn);
 	}
 
-	conn->end.fmtp_extra = talloc_strdup(trunk->endpoints,
-					     trunk->audio_fmtp_extra);
-
 	if (pdata->cfg->force_ptime) {
 		conn->end.packet_duration_ms = pdata->cfg->force_ptime;
 		conn->end.force_output_ptime = 1;
diff --git a/src/libosmo-mgcp/mgcp_sdp.c b/src/libosmo-mgcp/mgcp_sdp.c
index 183c4ec..77825f6 100644
--- a/src/libosmo-mgcp/mgcp_sdp.c
+++ b/src/libosmo-mgcp/mgcp_sdp.c
@@ -488,34 +488,10 @@
 }
 
 /* Add fmtp strings to sdp payload */
-static int add_fmtp(struct msgb *sdp, struct sdp_fmtp_param *fmtp_params, unsigned int fmtp_params_len,
-		    const char *fmtp_extra)
+static int add_fmtp(struct msgb *sdp, struct sdp_fmtp_param *fmtp_params, unsigned int fmtp_params_len)
 {
 	unsigned int i;
 	int rc;
-	int fmtp_extra_pt = -1;
-	char *fmtp_extra_pars = "";
-
-	/* When no fmtp parameters ara available but an fmtp extra string
-	 * is configured, just add the fmtp extra string */
-	if (fmtp_params_len == 0 && fmtp_extra) {
-		return msgb_printf(sdp, "%s\r\n", fmtp_extra);
-	}
-
-	/* When there is fmtp extra configured we dissect it in order to drop
-	 * in the configured extra parameters at the right place when
-	 * generating the fmtp strings. */
-	if (fmtp_extra) {
-		if (sscanf(fmtp_extra, "a=fmtp:%d ", &fmtp_extra_pt) != 1)
-			fmtp_extra_pt = -1;
-
-		fmtp_extra_pars = strstr(fmtp_extra, " ");
-
-		if (!fmtp_extra_pars)
-			fmtp_extra_pars = "";
-		else
-			fmtp_extra_pars++;
-	}
 
 	for (i = 0; i < fmtp_params_len; i++) {
 		rc = msgb_printf(sdp, "a=fmtp:%u", fmtp_params[i].payload_type);
@@ -532,13 +508,6 @@
 				return -EINVAL;
 		}
 
-		/* Append extra parameters from fmtp extra */
-		if (fmtp_params[i].payload_type == fmtp_extra_pt) {
-			rc = msgb_printf(sdp, " %s", fmtp_extra_pars);
-			if (rc < 0)
-				return -EINVAL;
-		}
-
 		rc = msgb_printf(sdp, "\r\n");
 		if (rc < 0)
 			return -EINVAL;
@@ -558,7 +527,6 @@
 			    const char *addr)
 {
 	const struct mgcp_rtp_codec *codec;
-	const char *fmtp_extra;
 	const char *audio_name;
 	int payload_type;
 	struct sdp_fmtp_param fmtp_param;
@@ -575,7 +543,6 @@
 	OSMO_ASSERT(addr);
 
 	codec = conn->end.codec;
-	fmtp_extra = conn->end.fmtp_extra;
 
 	audio_name = codec->audio_name;
 	payload_type = codec->payload_type;
@@ -617,7 +584,7 @@
 			fmtp_params[0] = fmtp_param;
 			fmtp_params_len = 1;
 		}
-		rc = add_fmtp(sdp, fmtp_params, fmtp_params_len, fmtp_extra);
+		rc = add_fmtp(sdp, fmtp_params, fmtp_params_len);
 		if (rc < 0)
 			goto buffer_too_small;
 	}
diff --git a/src/libosmo-mgcp/mgcp_vty.c b/src/libosmo-mgcp/mgcp_vty.c
index 784894c..b82f3df 100644
--- a/src/libosmo-mgcp/mgcp_vty.c
+++ b/src/libosmo-mgcp/mgcp_vty.c
@@ -111,9 +111,6 @@
 			VTY_NEWLINE);
 	} else
 		vty_out(vty, " no rtp-patch%s", VTY_NEWLINE);
-	if (trunk->audio_fmtp_extra)
-		vty_out(vty, " sdp audio fmtp-extra %s%s",
-			trunk->audio_fmtp_extra, VTY_NEWLINE);
 	vty_out(vty, " %ssdp audio-payload send-ptime%s",
 		trunk->audio_send_ptime ? "" : "no ", VTY_NEWLINE);
 	vty_out(vty, " %ssdp audio-payload send-name%s",
@@ -187,7 +184,7 @@
 		"   Payload Type: %d Rate: %u Channels: %d %s"
 		"   Frame Duration: %u Frame Denominator: %u%s"
 		"   FPP: %d Packet Duration: %u%s"
-		"   FMTP-Extra: %s Audio-Name: %s Sub-Type: %s%s"
+		"   Audio-Name: %s Sub-Type: %s%s"
 		"   Output-Enabled: %d Force-PTIME: %d%s",
 		tx_packets->current, tx_bytes->current, VTY_NEWLINE,
 		rx_packets->current, rx_bytes->current, VTY_NEWLINE,
@@ -198,7 +195,7 @@
 		codec->payload_type, codec->rate, codec->channels, VTY_NEWLINE,
 		codec->frame_duration_num, codec->frame_duration_den,
 		VTY_NEWLINE, end->frames_per_packet, end->packet_duration_ms,
-		VTY_NEWLINE, end->fmtp_extra, codec->audio_name,
+		VTY_NEWLINE, codec->audio_name,
 		codec->subtype_name, VTY_NEWLINE, end->output_enabled,
 		end->force_output_ptime, VTY_NEWLINE);
 	if (mgcp_conn_rtp_is_osmux(conn)) {
@@ -681,21 +678,15 @@
 	return CMD_SUCCESS;
 }
 
-DEFUN_USRATTR(cfg_mgcp_sdp_fmtp_extra,
-	      cfg_mgcp_sdp_fmtp_extra_cmd,
-	      X(MGW_CMD_ATTR_NEWCONN),
-	      "sdp audio fmtp-extra .NAME",
-	      "Add extra fmtp for the SDP file\n" "Audio\n" "Fmtp-extra\n"
-	      "Extra Information\n")
-{
-	struct mgcp_trunk *trunk = mgcp_trunk_by_num(g_cfg, MGCP_TRUNK_VIRTUAL, MGCP_VIRT_TRUNK_ID);
-	OSMO_ASSERT(trunk);
-	char *txt = argv_concat(argv, argc, 0);
-	if (!txt)
-		return CMD_WARNING;
+#define SDP_STR "SDP File related options\n"
+#define AUDIO_STR "Audio payload options\n"
 
-	osmo_talloc_replace_string(g_cfg, &trunk->audio_fmtp_extra, txt);
-	talloc_free(txt);
+DEFUN_DEPRECATED(cfg_mgcp_sdp_fmtp_extra,
+	      cfg_mgcp_sdp_fmtp_extra_cmd,
+	      "sdp audio fmtp-extra .NAME",
+	      SDP_STR AUDIO_STR "Deprecated, without effect since osmo-mgw v1.13\n" "Deprecated, without effect\n")
+{
+	vty_out(vty, "%% deprecated: the config option 'sdp audio fmtp-extra' has been removed.%s", VTY_NEWLINE);
 	return CMD_SUCCESS;
 }
 
@@ -715,8 +706,6 @@
 	return CMD_SUCCESS;
 }
 
-#define SDP_STR "SDP File related options\n"
-#define AUDIO_STR "Audio payload options\n"
 DEFUN_DEPRECATED(cfg_mgcp_sdp_payload_number,
       cfg_mgcp_sdp_payload_number_cmd,
       "sdp audio-payload number <0-255>",
@@ -1062,28 +1051,17 @@
 				VTY_NEWLINE);
 		} else
 			vty_out(vty, "  no rtp-patch%s", VTY_NEWLINE);
-		if (trunk->audio_fmtp_extra)
-			vty_out(vty, "   sdp audio fmtp-extra %s%s",
-				trunk->audio_fmtp_extra, VTY_NEWLINE);
 	}
 
 	return CMD_SUCCESS;
 }
 
-DEFUN_USRATTR(cfg_trunk_sdp_fmtp_extra,
+DEFUN_DEPRECATED(cfg_trunk_sdp_fmtp_extra,
 	      cfg_trunk_sdp_fmtp_extra_cmd,
-	      X(MGW_CMD_ATTR_NEWCONN),
 	      "sdp audio fmtp-extra .NAME",
-	      "Add extra fmtp for the SDP file\n" "Audio\n" "Fmtp-extra\n"
-	      "Extra Information\n")
+	      SDP_STR AUDIO_STR "Deprecated, without effect since osmo-mgw v1.13\n" "Deprecated, without effect\n")
 {
-	struct mgcp_trunk *trunk = vty->index;
-	char *txt = argv_concat(argv, argc, 0);
-	if (!txt)
-		return CMD_WARNING;
-
-	osmo_talloc_replace_string(g_cfg, &trunk->audio_fmtp_extra, txt);
-	talloc_free(txt);
+	vty_out(vty, "%% deprecated: the config option 'sdp audio fmtp-extra' has been removed.%s", VTY_NEWLINE);
 	return CMD_SUCCESS;
 }
 
diff --git a/tests/mgcp/mgcp_test.c b/tests/mgcp/mgcp_test.c
index e37bb57..621ee77 100644
--- a/tests/mgcp/mgcp_test.c
+++ b/tests/mgcp/mgcp_test.c
@@ -127,7 +127,6 @@
 	"t=0 0\r\n" \
 	"m=audio 16006 RTP/AVP 97\r\n" \
 	"a=rtpmap:97 GSM-EFR/8000\r\n" \
-	"a=fmtp:126 0/1/2\r\n" \
 	"a=ptime:40\r\n"
 
 #define MDCX4_ADDR0000 \
@@ -336,7 +335,6 @@
 	"t=0 0\r\n" \
 	"m=audio 16006 RTP/AVP 97\r\n" \
 	"a=rtpmap:97 GSM-EFR/8000\r\n" \
-	"a=fmtp:126 0/1/2\r\n" \
 	"a=ptime:40\r\n"
 
 #define CRCX_ZYN \
@@ -586,7 +584,6 @@
 	const char *req;
 	const char *exp_resp;
 	int ptype;
-	const char *extra_fmtp;
 };
 
 static const struct mgcp_test tests[] = {
@@ -614,10 +611,9 @@
 	{"RQNT1", RQNT, RQNT1_RET},
 	{"RQNT2", RQNT2, RQNT2_RET},
 	{"DLCX", DLCX, DLCX_RET, PTYPE_IGNORE},
-	{"CRCX", CRCX, CRCX_FMTP_RET, 97,.extra_fmtp = "a=fmtp:126 0/1/2"},
-	{"MDCX3", MDCX3, MDCX3_FMTP_RET, PTYPE_NONE,.extra_fmtp =
-	 "a=fmtp:126 0/1/2"},
-	{"DLCX", DLCX, DLCX_RET, PTYPE_IGNORE,.extra_fmtp = "a=fmtp:126 0/1/2"},
+	{"CRCX", CRCX, CRCX_FMTP_RET, 97},
+	{"MDCX3", MDCX3, MDCX3_FMTP_RET, PTYPE_NONE},
+	{"DLCX", DLCX, DLCX_RET, PTYPE_IGNORE},
 	{"CRCX", CRCX_NO_LCO_NO_SDP, CRCX_NO_LCO_NO_SDP_RET, 97},
 	{"CRCX", CRCX_X_OSMO_IGN, CRCX_X_OSMO_IGN_RET, 97},
 	{"MDCX_TOO_LONG_CI", MDCX_TOO_LONG_CI, MDCX_TOO_LONG_CI_RET},
@@ -831,9 +827,6 @@
 
 		dummy_packets = 0;
 
-		osmo_talloc_replace_string(cfg, &trunk->audio_fmtp_extra,
-					   t->extra_fmtp);
-
 		inp = create_msg(t->req, last_conn_id);
 		msg = mgcp_handle_message(cfg, inp);
 		msgb_free(inp);