diff --git a/lib_com/cnst.h b/lib_com/cnst.h
index 556da0d14196131be5b7eb2fb21dde24c2a7236d..949a5ea09f444ddc583e318ddf34c46029134529 100644
--- a/lib_com/cnst.h
+++ b/lib_com/cnst.h
@@ -750,6 +750,10 @@ typedef enum
 #define GAIN_PRED_ORDER                     4                       /* Gain quantization - prediction order for gain quantizer (only for AMR-WB IO mode) */
 #define MEAN_ENER                           30                      /* Gain quantization - average innovation energy */
 
+#ifdef NONBE_FIX_1277_EVS_DTX_HIGH_RATE_THRESHOLD
+#define DTX_THR     5                                               /* DTX - lp_noise threshold for DTX at higher bitrates */
+#endif
+
 #define DTX_HIST_SIZE                       8                       /* CNG & DTX - number of last signal frames used for CNG averaging */
 #define CNG_ISF_FACT                        0.9f                    /* CNG & DTX - CNG spectral envelope smoothing factor */
 #define STEP_AMR_WB_SID                     2.625f                  /* CNG & DTX - CNG energy quantization step */
diff --git a/lib_com/options.h b/lib_com/options.h
index c7111f22ab1d23e4ce71b989b4ad4934f58f22a4..cc3f12cbf563323a4dfdcbb1b3283355e97ce414 100644
--- a/lib_com/options.h
+++ b/lib_com/options.h
@@ -178,6 +178,8 @@
 #define FIX_920_IGF_INIT_ERROR                          /* FhG: issue 920: fix bitrate mismatch in initial IGF config to avoid error message in same cases */
 #define NONBE_1273_ISM_METADATA_COUNTER                 /* VA: FLP issue 1273: fix counter overflow in ISM metadata encoder */
 #define NONBE_FIX_GSC_BSTR                              /* VA: issue 1264 FLP (1189 BASOP): Fix bitstream synchronization between encoder and decoder in ACELP GSC in OMASA */
+#define NONBE_FIX_1277_EVS_DTX_HIGH_RATE_THRESHOLD      /* VA/Eri: FLP issue 1277: Fix Mismatch in DTX high-rate threshold between EVS float and BASOP */
+
 
 /* #################### End FIXES switches ############################ */
 
diff --git a/lib_enc/dtx.c b/lib_enc/dtx.c
index c1e842e589a35df5626844bfaa2c84fda9d2758a..449678bd0825bab4b263183f39db08a070e63acb 100644
--- a/lib_enc/dtx.c
+++ b/lib_enc/dtx.c
@@ -65,6 +65,11 @@
 
 #define MAX_BRATE_DTX_EVS  ACELP_24k40 /* maximum bitrate to which the default DTX is applied in EVS; otherwise DTX is applied only in silence */
 #define MAX_BRATE_DTX_IVAS IVAS_80k    /* maximum bitrate to which the default DTX is applied in IVAS; otherwise DTX is applied only in silence */
+
+#ifdef NONBE_FIX_1277_EVS_DTX_HIGH_RATE_THRESHOLD
+#define DTX_THR_EVS 15 /* lp_noise threshold for DTX at higher bitrates in EVS */ // ToDo: to be removed once EVS is CR fixed
+#endif
+
 /*-------------------------------------------------------------------*
  * Local function prototypes
  *-------------------------------------------------------------------*/
@@ -92,6 +97,15 @@ void dtx(
     int16_t last_br_cng_flag, last_br_flag, br_dtx_flag;
 #ifdef NONBE_1211_DTX_BR_SWITCHING
     int32_t total_brate_ref;
+#ifdef NONBE_FIX_1277_EVS_DTX_HIGH_RATE_THRESHOLD
+    int16_t dtx_thr;
+
+    dtx_thr = DTX_THR;
+    if ( st->element_mode == EVS_MONO )
+    {
+        dtx_thr = DTX_THR_EVS; // ToDo: to be removed once EVS is CR fixed
+    }
+#endif
 
     total_brate_ref = st->total_brate;
 #endif
@@ -106,11 +120,19 @@ void dtx(
     }
     else
     {
+#ifdef NONBE_FIX_1277_EVS_DTX_HIGH_RATE_THRESHOLD
+        last_br_cng_flag = st->last_total_brate_cng <= MAX_BRATE_DTX_EVS || st->lp_noise < dtx_thr || ( st->element_mode == IVAS_SCE && st->last_total_brate_cng <= MAX_BRATE_DTX_IVAS );
+#else
         last_br_cng_flag = st->last_total_brate_cng <= MAX_BRATE_DTX_EVS || st->lp_noise < 15 || ( st->element_mode == IVAS_SCE && st->last_total_brate_cng <= MAX_BRATE_DTX_IVAS );
+#endif
 #ifdef NONBE_1211_DTX_BR_SWITCHING
         last_br_flag = ( st->element_mode == EVS_MONO && st->last_total_brate <= MAX_BRATE_DTX_EVS ) ||
                        ( st->element_mode != EVS_MONO && last_ivas_total_brate <= MAX_BRATE_DTX_IVAS ) ||
+#ifdef NONBE_FIX_1277_EVS_DTX_HIGH_RATE_THRESHOLD
+                       st->lp_noise < dtx_thr;
+#else
                        st->lp_noise < 15;
+#endif
 #else
         last_br_flag = st->last_total_brate <= MAX_BRATE_DTX_EVS || st->lp_noise < 15 || ( st->element_mode == IVAS_SCE && st->last_total_brate <= MAX_BRATE_DTX_IVAS );
         br_dtx_flag = 0;
@@ -195,7 +217,11 @@ void dtx(
     {
         br_dtx_flag = ( st->element_mode == EVS_MONO && st->total_brate <= MAX_BRATE_DTX_EVS ) ||
                       ( st->element_mode != EVS_MONO && ivas_total_brate <= MAX_BRATE_DTX_IVAS ) ||
+#ifdef NONBE_FIX_1277_EVS_DTX_HIGH_RATE_THRESHOLD
+                      st->lp_noise < dtx_thr;
+#else
                       st->lp_noise < 15;
+#endif
     }
 
     if ( st->Opt_DTX_ON && vad == 0 &&
diff --git a/lib_enc/ivas_ism_dtx_enc.c b/lib_enc/ivas_ism_dtx_enc.c
index 1277d0d887fccdf689c89162c3f9469db876ee68..04d656765db0f8b2e91d463ce13b9c24bbf93e3e 100644
--- a/lib_enc/ivas_ism_dtx_enc.c
+++ b/lib_enc/ivas_ism_dtx_enc.c
@@ -155,7 +155,11 @@ int16_t ivas_ism_dtx_enc(
             ( nchan_ism == 2 && ivas_total_brate <= IVAS_48k ) ||
             ( nchan_ism == 3 && ivas_total_brate <= IVAS_80k ) ||
             ( nchan_ism == 4 && ivas_total_brate <= IVAS_96k ) ||
+#ifdef NONBE_FIX_1277_EVS_DTX_HIGH_RATE_THRESHOLD
+            lp_noise_max < DTX_THR ) )
+#else
             lp_noise_max < 15 ) )
+#endif
     {
         dtx_flag = 0;
     }