diff --git a/src/libmsc/msc_a.c b/src/libmsc/msc_a.c
index b9aaeaa..5a5bb8a 100644
--- a/src/libmsc/msc_a.c
+++ b/src/libmsc/msc_a.c
@@ -488,6 +488,16 @@
 			 __func__);
 		return true;
 	}
+	if (osmo_use_count_by(&msc_a->use_count, MSC_A_USE_CM_SERVICE_GCC)) {
+		LOG_MSC_A(msc_a, LOGL_DEBUG, "%s: still awaiting MO GCC request after a CM Service Request\n",
+			 __func__);
+		return true;
+	}
+	if (osmo_use_count_by(&msc_a->use_count, MSC_A_USE_CM_SERVICE_BCC)) {
+		LOG_MSC_A(msc_a, LOGL_DEBUG, "%s: still awaiting MO BCC request after a CM Service Request\n",
+			 __func__);
+		return true;
+	}
 	if (osmo_use_count_by(&msc_a->use_count, MSC_A_USE_CM_SERVICE_SMS)) {
 		LOG_MSC_A(msc_a, LOGL_DEBUG, "%s: still awaiting MO SMS after a CM Service Request\n",
 			 __func__);
@@ -873,6 +883,8 @@
 		MSC_A_USE_CM_SERVICE_CC,
 		MSC_A_USE_CM_SERVICE_SMS,
 		MSC_A_USE_CM_SERVICE_SS,
+		MSC_A_USE_CM_SERVICE_GCC,
+		MSC_A_USE_CM_SERVICE_BCC,
 		MSC_A_USE_PAGING_RESPONSE,
 	};
 
@@ -1955,6 +1967,12 @@
 	case GSM48_CMSERV_SUP_SERV:
 		return MSC_A_USE_CM_SERVICE_SS;
 
+	case GSM48_CMSERV_VGCS:
+		return MSC_A_USE_CM_SERVICE_GCC;
+
+	case GSM48_CMSERV_VBS:
+		return MSC_A_USE_CM_SERVICE_BCC;
+
 	default:
 		return NULL;
 	}
diff --git a/src/libmsc/transaction.c b/src/libmsc/transaction.c
index 21f0b8b..9fc4682 100644
--- a/src/libmsc/transaction.c
+++ b/src/libmsc/transaction.c
@@ -351,6 +351,8 @@
 }
 
 const struct value_string trans_type_names[] = {
+	{ TRANS_GCC, "GCC" },
+	{ TRANS_BCC, "BCC" },
 	{ TRANS_CC, "CC" },
 	{ TRANS_SMS, "SMS" },
 	{ TRANS_USSD, "NCSS" },
@@ -361,6 +363,10 @@
 uint8_t trans_type_to_gsm48_proto(enum trans_type type)
 {
 	switch (type) {
+	case TRANS_GCC:
+		return GSM48_PDISC_GROUP_CC;
+	case TRANS_BCC:
+		return GSM48_PDISC_BCAST_CC;
 	case TRANS_CC:
 	case TRANS_SILENT_CALL:
 		return GSM48_PDISC_CC;