diff --git a/include/osmocom/gsm/protocol/gsm_08_58.h b/include/osmocom/gsm/protocol/gsm_08_58.h
index 3ea4e63..1d4530d 100644
--- a/include/osmocom/gsm/protocol/gsm_08_58.h
+++ b/include/osmocom/gsm/protocol/gsm_08_58.h
@@ -50,6 +50,8 @@
 #define ABIS_RSL_CHAN_NR_CBITS_RACH		0x11
 #define ABIS_RSL_CHAN_NR_CBITS_PCH_AGCH	0x12
 #define ABIS_RSL_CHAN_NR_CBITS_OSMO_PDCH	0x18 /*< non-standard, for dyn TS */
+#define ABIS_RSL_CHAN_NR_CBITS_OSMO_CBCH4	0x19 /*< non-standard, for CBCH/SDCCH4 */
+#define ABIS_RSL_CHAN_NR_CBITS_OSMO_CBCH8	0x1a /*< non-standard, for CBCH/SDCCH8 */
 
 /* Link Identifier 9.3.2 */
 union abis_rsl_link_id {
@@ -424,6 +426,8 @@
 #define RSL_CHAN_RACH		0x88
 #define RSL_CHAN_PCH_AGCH	0x90
 #define RSL_CHAN_OSMO_PDCH	0xc0	/*< non-standard, for dyn TS */
+#define RSL_CHAN_OSMO_CBCH4	0xc8	/*< non-standard, for CBCH/SDCCH4 */
+#define RSL_CHAN_OSMO_CBCH8	0xd0	/*< non-standard, for CBCH/SDCCH8 */
 
 /* Chapter 9.3.3 */
 #define RSL_ACT_TYPE_INITIAL	0x00
diff --git a/src/gsm/rsl.c b/src/gsm/rsl.c
index 1777479..0409734 100644
--- a/src/gsm/rsl.c
+++ b/src/gsm/rsl.c
@@ -209,6 +209,12 @@
 	} else if ((chan_nr & 0xf8) == RSL_CHAN_OSMO_PDCH) {
 		*type = RSL_CHAN_OSMO_PDCH;
 		*subch = 0;
+	} else if ((chan_nr & 0xf8) == RSL_CHAN_OSMO_CBCH4) {
+		*type = RSL_CHAN_OSMO_CBCH4;
+		*subch = 0;
+	} else if ((chan_nr & 0xf8) == RSL_CHAN_OSMO_CBCH8) {
+		*type = RSL_CHAN_OSMO_CBCH8;
+		*subch = 0;
 	} else
 		return -EINVAL;
 
@@ -242,6 +248,10 @@
 		snprintf(buf, buf_len, "PCH/AGCH on TS%d", ts);
 	else if (cbits == 0x18)
 		snprintf(buf, buf_len, "PDCH on TS%d", ts);
+	else if (cbits == 0x19)
+		snprintf(buf, buf_len, "CBCH(SDCCH/4) on TS%d", ts);
+	else if (cbits == 0x1a)
+		snprintf(buf, buf_len, "CBCH(SDCCH/8) on TS%d", ts);
 	else
 		snprintf(buf, buf_len, "UNKNOWN on TS%d", ts);