diff --git a/src/eurosignal/main.c b/src/eurosignal/main.c
index c5a9579..88f63bc 100644
--- a/src/eurosignal/main.c
+++ b/src/eurosignal/main.c
@@ -177,6 +177,8 @@ int main(int argc, char *argv[])
 	init_es_teilges();
 	init_es_kaudn();
 
+	/* init mobile interface */
+	console_digits = "0123456789ABCDE";
 	main_mobile_init();
 
 	/* handle options / config file */
diff --git a/src/libmncc/mncc_console.c b/src/libmncc/mncc_console.c
index 06d5778..599dad7 100644
--- a/src/libmncc/mncc_console.c
+++ b/src/libmncc/mncc_console.c
@@ -75,9 +75,10 @@ typedef struct console {
 	int test_audio_pos;	/* position for test tone toward mobile */
 	sample_t tx_buffer[160];/* transmit audio buffer */
 	int tx_buffer_pos;	/* current position in transmit audio buffer */
-	int dial_digits;	/* number of digits to be dialed */
+	int num_digits;		/* number of digits to be dialed */
 	int loopback;		/* loopback test for echo */
 	int echo_test;		/* send echo back to mobile phone */
+	const char *digits;	/* list of dialable digits */
 } console_t;
 
 static console_t console;
@@ -187,8 +188,8 @@ static int console_mncc_up(uint8_t *buf, int length)
 		}
 		console.callref = mncc->callref;
 		if (mncc->calling.number[0]) {
-			strncpy(console.station_id, mncc->calling.number, console.dial_digits);
-			console.station_id[console.dial_digits] = '\0';
+			strncpy(console.station_id, mncc->calling.number, console.num_digits);
+			console.station_id[console.num_digits] = '\0';
 		}
 		strncpy(console.dialing, mncc->called.number, sizeof(console.dialing) - 1);
 		console.dialing[sizeof(console.dialing) - 1] = '\0';
@@ -205,8 +206,8 @@ static int console_mncc_up(uint8_t *buf, int length)
 	case MNCC_SETUP_CNF:
 		PDEBUG(DMNCC, DEBUG_INFO, "Call connected to '%s'\n", mncc->connected.number);
 		console_new_state(CONSOLE_CONNECT);
-		strncpy(console.station_id, mncc->connected.number, console.dial_digits);
-		console.station_id[console.dial_digits] = '\0';
+		strncpy(console.station_id, mncc->connected.number, console.num_digits);
+		console.station_id[console.num_digits] = '\0';
 		/* send down reused MNCC */
 		mncc->msg_type = MNCC_SETUP_COMPL_REQ;
 		mncc_down(buf, length);
@@ -249,7 +250,7 @@ static void _print_console_text(void)
 	printf("\033[0;39m");
 }
 
-int console_init(const char *station_id, const char *audiodev, int samplerate, int latency, int dial_digits, int loopback, int echo_test)
+int console_init(const char *station_id, const char *audiodev, int samplerate, int latency, int num_digits, int loopback, int echo_test, const char *digits)
 {
 	int rc = 0;
 
@@ -263,9 +264,10 @@ int console_init(const char *station_id, const char *audiodev, int samplerate, i
 	strncpy(console.audiodev, audiodev, sizeof(console.audiodev) - 1);
 	console.samplerate = samplerate;
 	console.latspl = latency * samplerate / 1000;
-	console.dial_digits = dial_digits;
+	console.num_digits = num_digits;
 	console.loopback = loopback;
 	console.echo_test = echo_test;
+	console.digits = digits;
 
 	mncc_up = console_mncc_up;
 
@@ -339,18 +341,23 @@ static void process_ui(int c)
 {
 	char text[256];
 	int len;
+	int i;
 
 	switch (console.state) {
 	case CONSOLE_IDLE:
 		if (c > 0) {
-			if (c >= '0' && c <= '9' && (int)strlen(console.station_id) < console.dial_digits) {
-				console.station_id[strlen(console.station_id) + 1] = '\0';
-				console.station_id[strlen(console.station_id)] = c;
+			if ((int)strlen(console.station_id) < console.num_digits) {
+				for (i = 0; i < (int)strlen(console.digits); i++) {
+					if (c == console.digits[i]) {
+						console.station_id[strlen(console.station_id) + 1] = '\0';
+						console.station_id[strlen(console.station_id)] = c;
+					}
+				}
 			}
 			if ((c == 8 || c == 127) && strlen(console.station_id))
 				console.station_id[strlen(console.station_id) - 1] = '\0';
 dial_after_hangup:
-			if (c == 'd' && (int)strlen(console.station_id) == console.dial_digits) {
+			if (c == 'd' && (int)strlen(console.station_id) == console.num_digits) {
 				int callref = ++new_callref;
 				uint8_t buf[sizeof(struct gsm_mncc)];
 				struct gsm_mncc *mncc = (struct gsm_mncc *)buf;
@@ -372,8 +379,8 @@ dial_after_hangup:
 				mncc_down(buf, sizeof(struct gsm_mncc));
 			}
 		}
-		if (console.dial_digits != (int)strlen(console.station_id))
-			sprintf(text, "on-hook: %s%s (enter digits 0..9)\r", console.station_id, "..............." + 15 - console.dial_digits + strlen(console.station_id));
+		if (console.num_digits != (int)strlen(console.station_id))
+			sprintf(text, "on-hook: %s%s (enter digits 0..9)\r", console.station_id, "..............." + 15 - console.num_digits + strlen(console.station_id));
 		else
 			sprintf(text, "on-hook: %s (press d=dial)\r", console.station_id);
 		break;
diff --git a/src/libmncc/mncc_console.h b/src/libmncc/mncc_console.h
index 7a80d97..9ec1aaa 100644
--- a/src/libmncc/mncc_console.h
+++ b/src/libmncc/mncc_console.h
@@ -1,5 +1,5 @@
 
-int console_init(const char *station_id, const char *audiodev, int samplerate, int latency, int dial_digits, int loopback, int echo_test);
+int console_init(const char *station_id, const char *audiodev, int samplerate, int latency, int dial_digits, int loopback, int echo_test, const char *digits);
 void console_cleanup(void);
 int console_open_audio(int latspl);
 int console_start_audio(void);
diff --git a/src/libmobile/main_mobile.c b/src/libmobile/main_mobile.c
index ac3ac61..2ae7bf7 100644
--- a/src/libmobile/main_mobile.c
+++ b/src/libmobile/main_mobile.c
@@ -76,6 +76,7 @@ const char *write_tx_wave = NULL;
 const char *write_rx_wave = NULL;
 const char *read_tx_wave = NULL;
 const char *read_rx_wave = NULL;
+const char *console_digits = "0123456789";
 
 void main_mobile_init(void)
 {
@@ -473,7 +474,7 @@ void main_mobile(int *quit, int latency, int interval, void (*myhandler)(void),
 			return;
 		}
 	} else {
-		console_init(station_id, call_audiodev, call_samplerate, latency, station_id_digits, loopback, echo_test);
+		console_init(station_id, call_audiodev, call_samplerate, latency, station_id_digits, loopback, echo_test, console_digits);
 	}
 
 	/* init call control instance */
@@ -617,7 +618,7 @@ next_char:
 			dump_info();
 			goto next_char;
 #ifdef HAVE_SDR
-		case 'B':
+		case 'b':
 			calibrate_bias();
 			goto next_char;
 #endif
diff --git a/src/libmobile/main_mobile.h b/src/libmobile/main_mobile.h
index 9742f6d..aa6625c 100644
--- a/src/libmobile/main_mobile.h
+++ b/src/libmobile/main_mobile.h
@@ -20,6 +20,7 @@ extern const char *write_rx_wave;
 extern const char *write_tx_wave;
 extern const char *read_rx_wave;
 extern const char *read_tx_wave;
+extern const char *console_digits;
 
 void main_mobile_init(void);
 void main_mobile_print_help(const char *arg0, const char *ext_usage);
diff --git a/src/libsdr/sdr_config.c b/src/libsdr/sdr_config.c
index 960d718..df138ae 100644
--- a/src/libsdr/sdr_config.c
+++ b/src/libsdr/sdr_config.c
@@ -102,7 +102,7 @@ void sdr_config_print_hotkeys(void)
 {
 	printf("Press 'q' key to toggle display of RX I/Q vector.\n");
 	printf("Press 's' key to toggle display of RX spectrum.\n");
-	printf("Press shift + 'B' key to remove DC level.\n");
+	printf("Press 'b' key to remove DC level.\n");
 }
 
 #define	OPT_SDR_UHD		1500
diff --git a/src/radio/main.c b/src/radio/main.c
index 5cae0be..6b3ba59 100644
--- a/src/radio/main.c
+++ b/src/radio/main.c
@@ -482,7 +482,7 @@ next_char:
 			display_spectrum_on(0);
 			display_wave_on(-1);
 			goto next_char;
-		case 'B':
+		case 'b':
 			calibrate_bias();
 			goto next_char;
 		}