diff --git a/doc/examples/osmo-cbc/osmo-cbc.cfg b/doc/examples/osmo-cbc/osmo-cbc.cfg
index 847b901..7f5ebdc 100644
--- a/doc/examples/osmo-cbc/osmo-cbc.cfg
+++ b/doc/examples/osmo-cbc/osmo-cbc.cfg
@@ -1,8 +1,9 @@
 log stderr
  logging level main notice
- logging level rest notice
  logging level cbsp notice
  logging level sbcap notice
+ logging level asn1c notice
+ logging level rest notice
 cbc
  unknown-peers reject
  ecbe
diff --git a/include/osmocom/cbc/debug.h b/include/osmocom/cbc/debug.h
index 025419e..c0b3864 100644
--- a/include/osmocom/cbc/debug.h
+++ b/include/osmocom/cbc/debug.h
@@ -4,5 +4,6 @@ enum {
 	DMAIN,
 	DCBSP,
 	DSBcAP,
+	DASN1C,
 	DREST,
 };
diff --git a/include/osmocom/sbcap/sbcap_common.h b/include/osmocom/sbcap/sbcap_common.h
index 40da3ba..b0fc173 100644
--- a/include/osmocom/sbcap/sbcap_common.h
+++ b/include/osmocom/sbcap/sbcap_common.h
@@ -118,8 +118,8 @@
 
 #include <osmocom/core/logging.h>
 
-extern int _sbcap_DSBCAP;
-#define SBC_AP_DEBUG(x, args ...) DEBUGP(_sbcap_DSBCAP, x, ## args)
+extern int _sbcap_DASN1C;
+#define SBC_AP_DEBUG(x, args ...) DEBUGP(_sbcap_DASN1C, x, ## args)
 
 extern int asn1_xer_print;
 
@@ -140,7 +140,7 @@ SBcAP_SBC_AP_PDU_t *sbcap_decode(const struct msgb *msg);
 const char *sbcap_procedure_code_str(SBcAP_ProcedureCode_t pc);
 const char *sbcap_cause_str(SBcAP_Cause_t cause);
 
-void sbcap_set_log_area(int log_area);
+void sbcap_set_log_area(int log_area_sbcap, int log_area_asn1c);
 
 SBcAP_ProcedureCode_t sbcap_pdu_get_procedure_code(const SBcAP_SBC_AP_PDU_t *pdu);
 SBcAP_Criticality_t sbcap_pdu_get_criticality(const SBcAP_SBC_AP_PDU_t *pdu);
diff --git a/include/osmocom/sbcap/sbcap_internal.h b/include/osmocom/sbcap/sbcap_internal.h
index 81d058d..036c53b 100644
--- a/include/osmocom/sbcap/sbcap_internal.h
+++ b/include/osmocom/sbcap/sbcap_internal.h
@@ -2,7 +2,7 @@
 
 #include <osmocom/core/logging.h>
 
-extern int _sbcap_DSBCAP;
-#define SBC_AP_ASN_DEBUG(x, args ...) DEBUGP(_sbcap_DSBCAP, x "\n", ## args)
+extern int _sbcap_DASN1C;
+#define SBC_AP_ASN_DEBUG(x, args ...) DEBUGP(_sbcap_DASN1C, x "\n", ## args)
 
 #define	ASN_DEBUG	SBC_AP_ASN_DEBUG
diff --git a/src/cbc_main.c b/src/cbc_main.c
index 9373c41..5096dc8 100644
--- a/src/cbc_main.c
+++ b/src/cbc_main.c
@@ -44,6 +44,8 @@
 #include <osmocom/vty/logging.h>
 #include <osmocom/vty/misc.h>
 
+#include <osmocom/sbcap/sbcap_common.h>
+
 #include <osmocom/cbc/debug.h>
 #include <osmocom/cbc/cbc_data.h>
 #include <osmocom/cbc/cbc_vty.h>
@@ -74,6 +76,13 @@ static const struct log_info_cat log_info_cat[] = {
 		.enabled = 1,
 		.loglevel = LOGL_NOTICE,
 	},
+	[DASN1C] = {
+		.name = "DASN1C",
+		.description = "SBc-AP ASN1C enc/dec",
+		.color = "\033[1;34m",
+		.enabled = 1,
+		.loglevel = LOGL_NOTICE,
+	},
 	[DREST] = {
 		.name = "DREST",
 		.description = "REST interface",
@@ -250,6 +259,7 @@ int main(int argc, char **argv)
 	msgb_talloc_ctx_init(tall_cbc_ctx, 0);
 	osmo_init_logging2(tall_cbc_ctx, &log_info);
 	log_enable_multithread();
+	sbcap_set_log_area(DSBcAP, DASN1C);
 	osmo_stats_init(tall_cbc_ctx);
 	vty_init(&vty_info);
 
diff --git a/src/sbcap/sbcap_common.c b/src/sbcap/sbcap_common.c
index ddc0fed..a364c63 100644
--- a/src/sbcap/sbcap_common.c
+++ b/src/sbcap/sbcap_common.c
@@ -28,7 +28,9 @@
 extern int asn1_xer_print;
 
 int _sbcap_DSBCAP = 0;
+int _sbcap_DASN1C = 0;
 #define DSBCAP _sbcap_DSBCAP
+#define DASN1C _sbcap_DASN1C
 
 static const struct value_string sbcap_procedure_code_vals[] = {
 	{ SBcAP_ProcedureId_Write_Replace_Warning,		"Write-Replace-Warning" },
@@ -91,7 +93,8 @@ struct msgb *sbcap_encode(SBcAP_SBC_AP_PDU_t *pdu)
 	rval = aper_encode_to_buffer(&asn_DEF_SBcAP_SBC_AP_PDU, NULL, pdu,
 				     msgb_data(msg), msgb_tailroom(msg));
 	if (rval.encoded < 0) {
-		LOGP(DSBCAP, LOGL_ERROR, "Error encoding type: %s\n",
+		LOGP(DSBCAP, LOGL_ERROR, "%s: Error encoding type: %s\n",
+		     sbcap_pdu_get_name(pdu),
 		     rval.failed_type->name);
 		msgb_free(msg);
 		return NULL;
@@ -112,6 +115,7 @@ SBcAP_SBC_AP_PDU_t *sbcap_decode(const struct msgb *msg)
 		LOGP(DSBCAP, LOGL_ERROR, "Error decoding code=%d\n", rval.code);
 		return NULL;
 	}
+	LOGP(DSBCAP, LOGL_DEBUG, "Decoded %s\n", sbcap_pdu_get_name(pdu));
 	return pdu;
 }
 
@@ -192,9 +196,10 @@ void *sbcap_as_find_ie(void *void_list, SBcAP_ProtocolIE_ID_t ie_id)
 	return NULL;
 }
 
-void sbcap_set_log_area(int log_area)
+void sbcap_set_log_area(int log_area_sbcap, int log_area_asn1c)
 {
-	_sbcap_DSBCAP = log_area;
+	_sbcap_DSBCAP = log_area_sbcap;
+	_sbcap_DASN1C = log_area_asn1c;
 }
 
 SBcAP_Write_Replace_Warning_Request_IEs_t *sbcap_alloc_Write_Replace_Warning_Request_IE(
diff --git a/tests/sbcap/sbcap_test.c b/tests/sbcap/sbcap_test.c
index 9c8a60f..3298b60 100644
--- a/tests/sbcap/sbcap_test.c
+++ b/tests/sbcap/sbcap_test.c
@@ -202,8 +202,8 @@ SBc Application Part
 
 static const struct log_info_cat log_categories[] = {
 	[0] = {
-		.name = "DSBcAP",
-		.description = "SBc Application Part (CBC-MME)",
+		.name = "DMAIN",
+		.description = "main category",
 		.color = "\033[1;32m",
 		.enabled = 1,
 		.loglevel = LOGL_DEBUG,
@@ -220,7 +220,7 @@ int main(int argc, char **argv)
 	void *ctx = talloc_named_const(NULL, 0, "mgcp_test");
 	void *msgb_ctx = msgb_talloc_ctx_init(ctx, 0);
 	osmo_init_logging2(ctx, &log_info);
-	sbcap_set_log_area(0);
+	sbcap_set_log_area(0, 0);
 	log_set_log_level(osmo_stderr_target, LOGL_DEBUG);
 	log_set_print_category_hex(osmo_stderr_target, 0);
 	log_set_print_category(osmo_stderr_target, 0);