diff --git a/openbsc/include/openbsc/gsm_data.h b/openbsc/include/openbsc/gsm_data.h
index 14d8014..fe021e9 100644
--- a/openbsc/include/openbsc/gsm_data.h
+++ b/openbsc/include/openbsc/gsm_data.h
@@ -709,6 +709,10 @@
 	struct {
 		enum rrlp_mode mode;
 	} rrlp;
+
+	/* enable the DTXu and DTXd for this network */
+	int dtx_enabled;
+
 	int msc_prio;
 };
 
diff --git a/openbsc/src/abis_rsl.c b/openbsc/src/abis_rsl.c
index d83af4a..4827dd0 100644
--- a/openbsc/src/abis_rsl.c
+++ b/openbsc/src/abis_rsl.c
@@ -330,7 +330,10 @@
 	memset(cm, 0, sizeof(cm));
 
 	/* FIXME: what to do with data calls ? */
-	cm->dtx_dtu = 0x00;
+	if (lchan->ts->trx->bts->network->dtx_enabled)
+		cm->dtx_dtu = 0x03;
+	else
+		cm->dtx_dtu = 0x00;
 
 	/* set TCH Speech/Data */
 	cm->spd_ind = lchan->rsl_cmode;
diff --git a/openbsc/src/bsc_init.c b/openbsc/src/bsc_init.c
index 2d92b42..4f7e29c 100644
--- a/openbsc/src/bsc_init.c
+++ b/openbsc/src/bsc_init.c
@@ -1153,8 +1153,14 @@
 	}
 
 	/* some defaults for our system information */
-	bts->si_common.cell_options.radio_link_timeout = 2; /* 12 */
-	bts->si_common.cell_options.dtx = 2; /* MS shall not use upplink DTX */
+	bts->si_common.cell_options.radio_link_timeout = 7; /* 12 */
+
+	/* allow/disallow DTXu */
+	if (bts->network->dtx_enabled)
+		bts->si_common.cell_options.dtx = 0;
+	else
+		bts->si_common.cell_options.dtx = 2;
+
 	bts->si_common.cell_options.pwrc = 0; /* PWRC not set */
 
 	bts->si_common.cell_sel_par.acs = 0;
diff --git a/openbsc/src/bsc_vty.c b/openbsc/src/bsc_vty.c
index 5863015..f56440e 100644
--- a/openbsc/src/bsc_vty.c
+++ b/openbsc/src/bsc_vty.c
@@ -505,6 +505,7 @@
 	vty_out(vty, " timer t3117 %u%s", gsmnet->T3117, VTY_NEWLINE);
 	vty_out(vty, " timer t3119 %u%s", gsmnet->T3119, VTY_NEWLINE);
 	vty_out(vty, " timer t3141 %u%s", gsmnet->T3141, VTY_NEWLINE);
+	vty_out(vty, " use-dtx %u%s", gsmnet->dtx_enabled, VTY_NEWLINE);
 
 	return CMD_SUCCESS;
 }
@@ -1277,6 +1278,16 @@
 DECLARE_TIMER(3119, "Currently not used.")
 DECLARE_TIMER(3141, "Currently not used.")
 
+DEFUN(cfg_net_dtx,
+      cfg_net_dtx_cmd,
+      "dtx-used (0|1)",
+      "Enable the usage of DTX.\n"
+      "DTX is enabled/disabled")
+{
+	struct gsm_network *gsmnet = gsmnet_from_vty(vty);
+	gsmnet->dtx_enabled = atoi(argv[0]);
+	return CMD_SUCCESS;
+}
 
 /* per-BTS configuration */
 DEFUN(cfg_bts,
@@ -2285,6 +2296,7 @@
 	install_element(GSMNET_NODE, &cfg_net_T3117_cmd);
 	install_element(GSMNET_NODE, &cfg_net_T3119_cmd);
 	install_element(GSMNET_NODE, &cfg_net_T3141_cmd);
+	install_element(GSMNET_NODE, &cfg_net_dtx_cmd);
 
 	install_element(GSMNET_NODE, &cfg_bts_cmd);
 	install_node(&bts_node, config_write_bts);