diff --git a/src/coding/gsm0503_amr_dtx.c b/src/coding/gsm0503_amr_dtx.c
index 724cf09..7069b96 100644
--- a/src/coding/gsm0503_amr_dtx.c
+++ b/src/coding/gsm0503_amr_dtx.c
@@ -45,16 +45,18 @@
 static const ubit_t codec_mode_4_sid[] = { 0, 0, 1, 0, 1, 0, 1, 1, 1, 0, 1, 0, 0, 1, 1, 1 };
 
 const struct value_string gsm0503_amr_dtx_frame_names[] = {
+	{ AMR_OTHER,		"AMR_OTHER (audio)" },
 	{ AFS_SID_FIRST,	"AFS_SID_FIRST" },
-	{ AFS_SID_UPDATE,	"AFS_SID_UPDATE" },
+	{ AFS_SID_UPDATE,	"AFS_SID_UPDATE (marker)" },
+	{ AFS_SID_UPDATE_CN,	"AFS_SID_UPDATE_CN (audio)" },
 	{ AFS_ONSET,		"AFS_ONSET" },
-	{ AHS_SID_UPDATE,	"AHS_SID_UPDATE" },
+	{ AHS_SID_UPDATE,	"AHS_SID_UPDATE (marker)" },
+	{ AHS_SID_UPDATE_CN,	"AHS_SID_UPDATE_CN (audio)" },
 	{ AHS_SID_FIRST_P1,	"AHS_SID_FIRST_P1" },
 	{ AHS_SID_FIRST_P2,	"AHS_SID_FIRST_P2" },
 	{ AHS_ONSET,		"AHS_ONSET" },
 	{ AHS_SID_FIRST_INH,	"AHS_SID_FIRST_INH" },
 	{ AHS_SID_UPDATE_INH,	"AHS_SID_UPDATE_INH" },
-	{ AMR_OTHER,		"NON DTX FRAME (OTHER)" },
 	{ 0, NULL }
 };
 
diff --git a/tests/dtx/dtx_gsm0503_test.ok b/tests/dtx/dtx_gsm0503_test.ok
index a95a18b..77a4936 100644
--- a/tests/dtx/dtx_gsm0503_test.ok
+++ b/tests/dtx/dtx_gsm0503_test.ok
@@ -1,9 +1,9 @@
 FR AMR DTX FRAMES:
  ==> AFS_SID_FIRST, n_errors=0, n_bits_total=212
- ==> AFS_SID_UPDATE, n_errors=0, n_bits_total=212
+ ==> AFS_SID_UPDATE (marker), n_errors=0, n_bits_total=212
  ==> AFS_ONSET, n_errors=0, n_bits_total=228
 HR AMR DTX FRAMES:
- ==> AHS_SID_UPDATE, n_errors=0, n_bits_total=212
+ ==> AHS_SID_UPDATE (marker), n_errors=0, n_bits_total=212
  ==> AHS_SID_FIRST_P1, n_errors=0, n_bits_total=212
  ==> AHS_SID_FIRST_P2, n_errors=0, n_bits_total=114
  ==> AHS_ONSET, n_errors=0, n_bits_total=114