diff --git a/include/openbsc/abis_rsl.h b/include/openbsc/abis_rsl.h
index b6d9a9d..532595b 100644
--- a/include/openbsc/abis_rsl.h
+++ b/include/openbsc/abis_rsl.h
@@ -379,7 +379,7 @@
 		      u_int8_t bs_power, u_int8_t ms_power,
 		      u_int8_t ta);
 int rsl_chan_activate_lchan(struct gsm_lchan *lchan, u_int8_t act_type, 
-			    u_int8_t ta);
+			    u_int8_t ta, u_int8_t mode);
 int rsl_chan_mode_modify_req(struct gsm_lchan *ts);
 int rsl_paging_cmd(struct gsm_bts *bts, u_int8_t paging_group, u_int8_t len,
 		   u_int8_t *ms_ident, u_int8_t chan_needed);
diff --git a/src/abis_rsl.c b/src/abis_rsl.c
index 918255c..c84d8e5 100644
--- a/src/abis_rsl.c
+++ b/src/abis_rsl.c
@@ -356,6 +356,7 @@
 }
 
 /* Chapter 8.4.1 */
+#if 0
 int rsl_chan_activate(struct gsm_bts_trx *trx, u_int8_t chan_nr,
 		      u_int8_t act_type,
 		      struct rsl_ie_chan_mode *chan_mode,
@@ -388,11 +389,10 @@
 
 	return abis_rsl_sendmsg(msg);
 }
-
-#define TSC	7
+#endif
 
 int rsl_chan_activate_lchan(struct gsm_lchan *lchan, u_int8_t act_type, 
-			    u_int8_t ta)
+			    u_int8_t ta, u_int8_t mode)
 {
 	struct abis_rsl_dchan_hdr *dh;
 	struct msgb *msg = rsl_msgb_alloc();
@@ -412,10 +412,17 @@
 		cm.chan_rate = 0x00;
 		break;
 	case GSM_LCHAN_TCH_F:
-		/* TCH/F are always activated in signalling mode first */
-		cm.spd_ind = RSL_CMOD_SPD_SIGN;
 		cm.chan_rt = RSL_CMOD_CRT_TCH_Bm;
-		cm.chan_rate = 0x00;
+		switch (mode) {
+		case RSL_CMOD_SPD_SIGN:
+			cm.spd_ind = RSL_CMOD_SPD_SIGN;
+			cm.chan_rate = 0x00;
+			break;
+		case RSL_CMOD_SPD_SPEECH:
+			cm.spd_ind = RSL_CMOD_SPD_SPEECH;
+			cm.chan_rate = RSL_CMOD_SP_GSM2;
+			break;
+		}
 		break;
 	case GSM_LCHAN_TCH_H:
 		DEBUGP(DRSL, "Unimplemented TCH_H activation\n");
@@ -805,7 +812,7 @@
 	subch = lchan->nr;
 	
 	lchan->ms_power = lchan->bs_power = 0x0f; /* 30dB reduction */
-	rsl_chan_activate_lchan(lchan, 0x00, rqd_ta);
+	rsl_chan_activate_lchan(lchan, 0x00, rqd_ta, RSL_CMOD_SPD_SIGN);
 
 	/* create IMMEDIATE ASSIGN 04.08 messge */
 	memset(&ia, 0, sizeof(ia));