diff --git a/board.c b/board.c
index 2c3aa4a..e48f9e7 100644
--- a/board.c
+++ b/board.c
@@ -603,7 +603,7 @@ void BOARD_EEPROM_Init(void)
 	gEeprom.REPEATER_TAIL_TONE_ELIMINATION = (Data[2] < 11) ? Data[2] : 0;
 	gEeprom.TX_VFO                         = (Data[3] <  2) ? Data[3] : 0;
 	gEeprom.BATTERY_TYPE                   = (Data[4] < BATTERY_TYPE_UNKNOWN) ? Data[4] : BATTERY_TYPE_1600_MAH;
-	gEeprom.SQL_TONE                       = (Data[5] <  ARRAY_SIZE(CTCSS_Options)) ? Data[5] : 0;
+	gEeprom.SQL_TONE                       = (Data[5] <  ARRAY_SIZE(CTCSS_Options)) ? Data[5] : 50;
 	// 0ED0..0ED7
 	EEPROM_ReadBuffer(0x0ED0, Data, 8);
 	gEeprom.DTMF_SIDE_TONE               = (Data[0] <   2) ? Data[0] : true;
diff --git a/dcs.c b/dcs.c
index 275cd7b..c4728b1 100644
--- a/dcs.c
+++ b/dcs.c
@@ -21,12 +21,13 @@
 #endif
 
 // CTCSS Hz * 10
-const uint16_t CTCSS_Options[51] = {
-	 550,  670,  693,  719,  744,  770,  797,  825,  854,  885,  915,
+const uint16_t CTCSS_Options[55] = {
+	 670,  693,  719,  744,  770,  797,  825,  854,  885,  915,
 	 948,  974, 1000, 1035, 1072, 1109, 1148, 1188, 1230, 1273,
 	1318, 1365, 1413, 1462, 1514, 1567, 1598, 1622, 1655, 1679,
 	1713, 1738, 1773, 1799, 1835, 1862, 1899, 1928, 1966, 1995,
-	2035, 2065, 2107, 2181, 2257, 2291, 2336, 2418, 2503, 2541
+	2035, 2065, 2107, 2181, 2257, 2291, 2336, 2418, 2503, 2541,
+	550,  575,  600,  625,  650  // non standard values
 };
 
 const uint16_t DCS_Options[104] = {
diff --git a/dcs.h b/dcs.h
index bd346f0..5c6cf66 100644
--- a/dcs.h
+++ b/dcs.h
@@ -34,7 +34,7 @@ enum {
 	CDCSS_NEGATIVE_CODE = 2U,
 };
 
-extern const uint16_t CTCSS_Options[51];
+extern const uint16_t CTCSS_Options[55];
 extern const uint16_t DCS_Options[104];
 
 uint32_t DCS_GetGolayCodeWord(DCS_CodeType_t CodeType, uint8_t Option);