diff --git a/lib_com/cnst.h b/lib_com/cnst.h
index 225d9e229477c43495c9c7e65d47237a86447b92..c7fb691fa2bb1bff08be971ca84720a37be48485 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 dd49c4cafee257b55d1b292c4af0dffb65e7ac7d..e95bf390685d45844d89194ed9c5a83d0a4237da 100644
--- a/lib_com/options.h
+++ b/lib_com/options.h
@@ -181,6 +181,9 @@
 #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 */
+#define NONBE_FIX_708_OSBA_BR_SWITCHING_CRASH           /* FhG: issue 708: fix crash in OSBA BR switching with long test vectors */
+
 
 #define NONBE_1319_M2R_PRECISION_ALIGN                  /* Nokia: bring updates from PC code related to OMASA masa2total ratios */
 /* #################### End FIXES switches ############################ */
diff --git a/lib_dec/ivas_sba_dec.c b/lib_dec/ivas_sba_dec.c
index 470cd6182b16e4f2d3b200e178e9210f4d6b0884..ac4e155b8ecc7ad80b9b5b4f7242519cc41acb54 100644
--- a/lib_dec/ivas_sba_dec.c
+++ b/lib_dec/ivas_sba_dec.c
@@ -296,7 +296,11 @@ ivas_error ivas_sba_dec_reconfigure(
             }
         }
 
+#ifdef NONBE_FIX_708_OSBA_BR_SWITCHING_CRASH
+        if ( hSpar->hPCA == NULL && st_ivas->hDecoderConfig->ivas_total_brate == PCA_BRATE && st_ivas->sba_order == 1 && ( st_ivas->ivas_format == SBA_FORMAT || st_ivas->ivas_format == SBA_ISM_FORMAT ) )
+#else
         if ( hSpar->hPCA == NULL && st_ivas->hDecoderConfig->ivas_total_brate == PCA_BRATE && st_ivas->sba_order == 1 && st_ivas->ivas_format == SBA_FORMAT )
+#endif
         {
             if ( ( hSpar->hPCA = (PCA_DEC_STATE *) malloc( sizeof( PCA_DEC_STATE ) ) ) == NULL )
             {
diff --git a/lib_enc/dtx.c b/lib_enc/dtx.c
index 0520898fd20d9ee5cc845c3dddc75481e1b48d23..77a7ad04043eb51039351c804bd282a7641c5e5c 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 5bfde57e007ed6630bffb7f09edafdf48ce602af..7c7114d6ea7f6391a0e286d78dab317fa637f9af 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;
     }
diff --git a/lib_enc/lib_enc.c b/lib_enc/lib_enc.c
index db5e9d0d42567ef797da25eb7eef586d88e4af58..3c186cc0166c4ff745d0032486f1be1afb274dfd 100644
--- a/lib_enc/lib_enc.c
+++ b/lib_enc/lib_enc.c
@@ -990,7 +990,11 @@ static ivas_error configureEncoder(
     }
 #endif
 
+#ifdef NONBE_FIX_708_OSBA_BR_SWITCHING_CRASH
+    if ( hEncoderConfig->Opt_PCA_ON && !( ( hEncoderConfig->ivas_format == SBA_FORMAT || hEncoderConfig->ivas_format == SBA_ISM_FORMAT ) && hEncoderConfig->ivas_total_brate == PCA_BRATE && hEncoderConfig->sba_order == SBA_FOA_ORDER ) )
+#else
     if ( hEncoderConfig->Opt_PCA_ON && !( hEncoderConfig->ivas_format == SBA_FORMAT && hEncoderConfig->ivas_total_brate == PCA_BRATE && hEncoderConfig->sba_order == SBA_FOA_ORDER ) )
+#endif
     {
         return IVAS_ERROR( IVAS_ERR_NOT_SUPPORTED_OPTION, "PCA supported at SBA FOA 256 kbps only." );
     }