diff --git a/src/anetz/anetz.c b/src/anetz/anetz.c
index 44d2935..b40d2e1 100644
--- a/src/anetz/anetz.c
+++ b/src/anetz/anetz.c
@@ -26,6 +26,8 @@
 #include "../common/timer.h"
 #include "../common/call.h"
 #include "../common/cause.h"
+#include "../common/freiton.h"
+#include "../common/besetztton.h"
 #include "anetz.h"
 #include "dsp.h"
 
diff --git a/src/anetz/main.c b/src/anetz/main.c
index 643c874..59a3f23 100644
--- a/src/anetz/main.c
+++ b/src/anetz/main.c
@@ -29,6 +29,8 @@
 #include "../common/timer.h"
 #include "../common/call.h"
 #include "../common/mncc_sock.h"
+#include "../common/freiton.h"
+#include "../common/besetztton.h"
 #include "anetz.h"
 #include "dsp.h"
 #include "image.h"
@@ -39,7 +41,7 @@ double lossdetect = 0;
 
 void print_help(const char *arg0)
 {
-	print_help_common(arg0);
+	print_help_common(arg0, "");
 	/*      -                                                                             - */
 	printf(" -P --page-sequence 0 | <ms>\n");
 	printf("        Cycle paging tones, rather than sending simultaniously.\n");
@@ -96,6 +98,10 @@ int main(int argc, char *argv[])
 	int skip_args;
 	const char *station_id = "";
 
+	/* init common tones */
+	init_freiton();
+	init_besetzton();
+
 	skip_args = handle_options(argc, argv);
 	argc -= skip_args;
 	argv += skip_args;
@@ -129,7 +135,7 @@ int main(int argc, char *argv[])
 	}
 	dsp_init();
 	anetz_init();
-	rc = call_init(station_id, call_sounddev, samplerate, latency, loopback);
+	rc = call_init(station_id, call_sounddev, samplerate, latency, 5, loopback);
 	if (rc < 0) {
 		fprintf(stderr, "Failed to create call control instance. Quitting!\n");
 		goto fail;
diff --git a/src/bnetz/Makefile.am b/src/bnetz/Makefile.am
index b3306ba..8cbe388 100644
--- a/src/bnetz/Makefile.am
+++ b/src/bnetz/Makefile.am
@@ -7,7 +7,7 @@ bnetz_SOURCES = \
 	bnetz.c \
 	dsp.c \
 	image.c \
-	ansage-27.c \
+	ansage.c \
 	main.c
 bnetz_LDADD = \
 	$(COMMON_LA) \
diff --git a/src/bnetz/ansage-27.h b/src/bnetz/ansage-27.h
deleted file mode 100644
index 0684664..0000000
--- a/src/bnetz/ansage-27.h
+++ /dev/null
@@ -1,3 +0,0 @@
-
-void init_ansage_27(void);
-
diff --git a/src/bnetz/ansage-27.c b/src/bnetz/ansage.c
similarity index 99%
rename from src/bnetz/ansage-27.c
rename to src/bnetz/ansage.c
index c44c325..7475198 100644
--- a/src/bnetz/ansage-27.c
+++ b/src/bnetz/ansage.c
@@ -1,5 +1,5 @@
 #include <stdint.h>
-#include "ansage-27.h"
+#include "ansage.h"
 
 static int16_t pattern[] = {
 	0xffd1, 0x0011, 0x0031, 0x002d, 0x0016, 0x000d, 0x002f, 0xffea,
@@ -4991,13 +4991,15 @@ static int16_t pattern[] = {
 	0x0006, 0x000e, 0xfffd, 0x000b, 0xfffc, 0x000b, 0x000e, 0xfffb,
 };
 
-extern int16_t *ansage_27_spl;
-extern int ansage_27_size;
+extern int16_t *outoforder_spl;
+extern int outoforder_size;
+extern int outoforder_max;
 
-void init_ansage_27(void)
+void init_ansage(void)
 {
-	ansage_27_spl = pattern;
-	ansage_27_size = sizeof(pattern) / sizeof(pattern[0]);
+	outoforder_spl = pattern;
+	outoforder_size = sizeof(pattern) / sizeof(pattern[0]);
+	outoforder_max = outoforder_size;
 }
 
 
diff --git a/src/bnetz/ansage.h b/src/bnetz/ansage.h
new file mode 100644
index 0000000..0fede4e
--- /dev/null
+++ b/src/bnetz/ansage.h
@@ -0,0 +1,3 @@
+
+void init_ansage(void);
+
diff --git a/src/bnetz/dsp.c b/src/bnetz/dsp.c
index fb352aa..db339a8 100644
--- a/src/bnetz/dsp.c
+++ b/src/bnetz/dsp.c
@@ -84,13 +84,13 @@ int dsp_init_sender(bnetz_t *bnetz)
 	PDEBUG(DFSK, DEBUG_DEBUG, "Using %d samples per bit duration.\n", bnetz->samples_per_bit);
 	bnetz->fsk_filter_step = bnetz->sender.samplerate * FILTER_STEP;
 	PDEBUG(DFSK, DEBUG_DEBUG, "Using %d samples per filter step.\n", bnetz->fsk_filter_step);
-	spl = calloc(16, bnetz->samples_per_bit << 1);
+	spl = calloc(16, bnetz->samples_per_bit * sizeof(*spl));
 	if (!spl) {
 		PDEBUG(DFSK, DEBUG_ERROR, "No memory!\n");
 		return -ENOMEM;
 	}
 	bnetz->telegramm_spl = spl;
-	spl = calloc(1, bnetz->samples_per_bit << 1);
+	spl = calloc(1, bnetz->samples_per_bit * sizeof(*spl));
 	if (!spl) {
 		PDEBUG(DFSK, DEBUG_ERROR, "No memory!\n");
 		return -ENOMEM;
@@ -204,7 +204,7 @@ char *show_level(int value)
 /* Filter one chunk of audio an detect tone, quality and loss of signal.
  * The chunk is a window of 10ms. This window slides over audio stream
  * and is processed every 1ms. (one step) */
-void fsk_decode_step(bnetz_t *bnetz, int pos)
+static inline void fsk_decode_step(bnetz_t *bnetz, int pos)
 {
 	double level, result[2], softbit, quality;
 	int max;
diff --git a/src/bnetz/main.c b/src/bnetz/main.c
index 2d7fa53..a788529 100644
--- a/src/bnetz/main.c
+++ b/src/bnetz/main.c
@@ -29,10 +29,12 @@
 #include "../common/call.h"
 #include "../common/mncc_sock.h"
 #include "../common/main.h"
+#include "../common/freiton.h"
+#include "../common/besetztton.h"
 #include "bnetz.h"
 #include "dsp.h"
 #include "image.h"
-#include "ansage-27.h"
+#include "ansage.h"
 
 int gfs = 2;
 const char *pilot = "tone";
@@ -40,7 +42,7 @@ double lossdetect = 0;
 
 void print_help(const char *arg0)
 {
-	print_help_common(arg0);
+	print_help_common(arg0, "");
 	/*      -                                                                             - */
 	printf(" -g --gfs <gruppenfreisignal>\n");
 	printf("        Gruppenfreisignal\" 1..9 | 19 | 10..18 (default = '%d')\n", gfs);
@@ -109,6 +111,11 @@ int main(int argc, char *argv[])
 	int skip_args;
 	const char *station_id = "";
 
+	/* init common tones */
+	init_freiton();
+	init_besetzton();
+	init_ansage();
+
 	skip_args = handle_options(argc, argv);
 	argc -= skip_args;
 	argv += skip_args;
@@ -138,10 +145,9 @@ int main(int argc, char *argv[])
 			return -1;
 		}
 	}
-	init_ansage_27();
 	dsp_init();
 	bnetz_init();
-	rc = call_init(station_id, call_sounddev, samplerate, latency, loopback);
+	rc = call_init(station_id, call_sounddev, samplerate, latency, 5, loopback);
 	if (rc < 0) {
 		fprintf(stderr, "Failed to create call control instance. Quitting!\n");
 		goto fail;
diff --git a/src/common/besetztton.c b/src/common/besetztton.c
index 572745b..701e62a 100644
--- a/src/common/besetztton.c
+++ b/src/common/besetztton.c
@@ -173,13 +173,23 @@ static int16_t pattern[] = {
 	0x008f, 0x0099, 0x001c, 0xffa8, 0xff93, 0xff52, 0xff9a, 0x0060,
 };
 
-extern int16_t *besetztton_spl;
-extern int besetztton_size;
+extern int16_t *busy_spl;
+extern int busy_size;
+extern int busy_max;
+
+extern int16_t *congestion_spl;
+extern int congestion_size;
+extern int congestion_max;
 
 void init_besetzton(void)
 {
-	besetztton_spl = pattern;
-	besetztton_size = sizeof(pattern) / sizeof(pattern[0]);
+	busy_spl = pattern;
+	busy_size = sizeof(pattern) / sizeof(pattern[0]);
+	busy_max = 8 * 750;
+
+	congestion_spl = pattern;
+	congestion_size = sizeof(pattern) / sizeof(pattern[0]);
+	congestion_max = 8 * 750;
 }
 
 
diff --git a/src/common/call.c b/src/common/call.c
index 4f8d89f..7902cc6 100644
--- a/src/common/call.c
+++ b/src/common/call.c
@@ -30,19 +30,23 @@
 #include "cause.h"
 #include "call.h"
 #include "mncc_sock.h"
-#include "freiton.h"
-#include "besetztton.h"
 
 extern int use_mncc_sock;
 extern int send_patterns;
 
 /* stream patterns/announcements */
-int16_t *ansage_27_spl = NULL;
-int16_t *freiton_spl = NULL;
-int16_t *besetztton_spl = NULL;
-int ansage_27_size = 0;
-int freiton_size = 0;
-int besetztton_size = 0;
+int16_t *outoforder_spl = NULL;
+int16_t *ringback_spl = NULL;
+int16_t *busy_spl = NULL;
+int16_t *congestion_spl = NULL;
+int outoforder_size = 0;
+int ringback_size = 0;
+int busy_size = 0;
+int congestion_size = 0;
+int outoforder_max = 0;
+int ringback_max = 0;
+int busy_max = 0;
+int congestion_max = 0;
 
 enum call_state {
 	CALL_IDLE = 0,
@@ -57,24 +61,61 @@ enum audio_pattern {
 	PATTERN_NONE = 0,
 	PATTERN_RINGBACK,
 	PATTERN_BUSY,
+	PATTERN_CONGESTION,
 	PATTERN_OUTOFORDER,
 };
 
+void get_pattern(const int16_t **spl, int *size, int *max, enum audio_pattern pattern)
+{
+	*spl = NULL;
+	*size = 0;
+	*max = 0;
+
+	switch (pattern) {
+	case PATTERN_RINGBACK:
+		*spl = ringback_spl;
+		*size = ringback_size;
+		*max = ringback_max;
+		break;
+	case PATTERN_BUSY:
+		*spl = busy_spl;
+		*size = busy_size;
+		*max = busy_max;
+		break;
+	case PATTERN_CONGESTION:
+no_outoforder:
+		*spl = congestion_spl;
+		*size = congestion_size;
+		*max = congestion_max;
+		break;
+	case PATTERN_OUTOFORDER:
+		if (!outoforder_spl)
+			goto no_outoforder;
+		*spl = outoforder_spl;
+		*size = outoforder_size;
+		*max = outoforder_max;
+		break;
+	default:
+		;
+	}
+}
+
 static int new_callref = 0; /* toward mobile */
 
 /* built in call instance */
 typedef struct call {
 	int callref;
 	enum call_state state;
-	int disc_cause; /* cause that has been sent by transceiver instance for release */
-	char station_id[6];
+	int disc_cause;		/* cause that has been sent by transceiver instance for release */
+	char station_id[16];
 	char dialing[16];
-	void *sound; /* headphone interface */
-	int latspl; /* sample latency at sound interface */
-	samplerate_t srstate; /* patterns/announcement upsampling */
-	jitter_t audio; /* headphone audio dejittering */
-	int audio_pos; /* position when playing patterns */
-	int loopback; /* loopback test for echo */
+	void *sound;		/* headphone interface */
+	int latspl;		/* sample latency at sound interface */
+	samplerate_t srstate;	/* patterns/announcement upsampling */
+	jitter_t audio;		/* headphone audio dejittering */
+	int audio_pos;		/* position when playing patterns */
+	int dial_digits;	/* number of digits to be dialed */
+	int loopback;		/* loopback test for echo */
 } call_t;
 
 static call_t call;
@@ -87,31 +128,10 @@ static void call_new_state(enum call_state state)
 
 static void get_call_patterns(int16_t *samples, int length, enum audio_pattern pattern)
 {
-	const int16_t *spl = NULL;
-	int size = 0, max = 0, pos;
+	const int16_t *spl;
+	int size, max, pos;
 
-	switch (pattern) {
-	case PATTERN_RINGBACK:
-		spl = freiton_spl;
-		size = freiton_size;
-		max = 8 * 5000;
-		break;
-	case PATTERN_BUSY:
-busy:
-		spl = besetztton_spl;
-		size = besetztton_size;
-		max = 8 * 750;
-		break;
-	case PATTERN_OUTOFORDER:
-		spl = ansage_27_spl;
-		size = ansage_27_size;
-		if (!spl || !size)
-			goto busy;
-		max = size;
-		break;
-	default:
-		return;
-	}
+	get_pattern(&spl, &size, &max, pattern);
 
 	/* stream sample */
 	pos = call.audio_pos;
@@ -131,11 +151,14 @@ static enum audio_pattern cause2pattern(int cause)
 	int pattern;
 
 	switch (cause) {
+	case CAUSE_BUSY:
+		pattern = PATTERN_BUSY;
+		break;
 	case CAUSE_OUTOFORDER:
 		pattern = PATTERN_OUTOFORDER;
 		break;
 	default:
-		pattern = PATTERN_BUSY;
+		pattern = PATTERN_CONGESTION;
 	}
 
 	return pattern;
@@ -290,28 +313,10 @@ static int is_process_pattern(int callref)
 
 static void get_process_patterns(process_t *process, int16_t *samples, int length)
 {
-	const int16_t *spl = NULL;
-	int size = 0, max = 0, pos;
+	const int16_t *spl;
+	int size, max, pos;
 
-	switch (process->pattern) {
-	case PATTERN_RINGBACK:
-		spl = freiton_spl;
-		size = freiton_size;
-		max = 8 * 5000;
-		break;
-	case PATTERN_BUSY:
-		spl = besetztton_spl;
-		size = besetztton_size;
-		max = 8 * 750;
-		break;
-	case PATTERN_OUTOFORDER:
-		spl = ansage_27_spl;
-		size = ansage_27_size;
-		max = size;
-		break;
-	default:
-		return;
-	}
+	get_pattern(&spl, &size, &max, process->pattern);
 
 	/* stream sample */
 	pos = process->audio_pos;
@@ -328,15 +333,11 @@ static void get_process_patterns(process_t *process, int16_t *samples, int lengt
 
 static struct termios term_orig;
 
-int call_init(const char *station_id, const char *sounddev, int samplerate, int latency, int loopback)
+int call_init(const char *station_id, const char *sounddev, int samplerate, int latency, int dial_digits, int loopback)
 {
 	struct termios term;
 	int rc = 0;
 
-	/* init common tones */
-	init_freiton();
-	init_besetzton();
-
 	if (use_mncc_sock)
 		return 0;
 
@@ -352,6 +353,7 @@ int call_init(const char *station_id, const char *sounddev, int samplerate, int
 	memset(&call, 0, sizeof(call));
 	strncpy(call.station_id, station_id, sizeof(call.station_id) - 1);
 	call.latspl = latency * samplerate / 1000;
+	call.dial_digits = dial_digits;
 	call.loopback = loopback;
 
 	if (!sounddev[0])
@@ -433,13 +435,13 @@ static int process_ui(void)
 	switch (call.state) {
 	case CALL_IDLE:
 		if (c > 0) {
-			if (c >= '0' && c <= '9' && strlen(call.station_id) < 5) {
+			if (c >= '0' && c <= '9' && strlen(call.station_id) < call.dial_digits) {
 				call.station_id[strlen(call.station_id) + 1] = '\0';
 				call.station_id[strlen(call.station_id)] = c;
 			}
 			if ((c == 8 || c == 127) && strlen(call.station_id))
 				call.station_id[strlen(call.station_id) - 1] = '\0';
-			if (c == 'd' && strlen(call.station_id) == 5) {
+			if (c == 'd' && strlen(call.station_id) == call.dial_digits) {
 				int rc;
 				int callref = ++new_callref;
 
@@ -456,7 +458,7 @@ static int process_ui(void)
 				}
 			}
 		}
-		printf("on-hook: %s%s (enter 0..9 or d=dial)\r", call.station_id, "....." + strlen(call.station_id));
+		printf("on-hook: %s%s (enter 0..9 or d=dial)\r", call.station_id, "..............." + 15 - call.dial_digits + strlen(call.station_id));
 		break;
 	case CALL_SETUP_MO:
 	case CALL_SETUP_MT:
@@ -624,8 +626,8 @@ int call_in_setup(int callref, const char *callerid, const char *dialing)
 	call.callref = callref;
 	call_new_state(CALL_CONNECT);
 	if (callerid[0]) {
-		strncpy(call.station_id, callerid, 5);
-		call.station_id[5] = '\0';
+		strncpy(call.station_id, callerid, call.dial_digits);
+		call.station_id[call.dial_digits] = '\0';
 	}
 	strncpy(call.dialing, dialing, sizeof(call.dialing) - 1);
 	call.dialing[sizeof(call.dialing) - 1] = '\0';
@@ -694,8 +696,8 @@ void call_in_answer(int callref, const char *connectid)
 		return;
 	}
 	call_new_state(CALL_CONNECT);
-	strncpy(call.station_id, connectid, 5);
-	call.station_id[5] = '\0';
+	strncpy(call.station_id, connectid, call.dial_digits);
+	call.station_id[call.dial_digits] = '\0';
 }
 
 /* Transceiver indicates release. */
diff --git a/src/common/call.h b/src/common/call.h
index bef9da0..4df116d 100644
--- a/src/common/call.h
+++ b/src/common/call.h
@@ -1,5 +1,5 @@
 
-int call_init(const char *station_id, const char *sounddev, int samplerate, int latency, int loopback);
+int call_init(const char *station_id, const char *sounddev, int samplerate, int latency, int dial_digits, int loopback);
 void call_cleanup(void);
 int process_call(void);
 
diff --git a/src/common/freiton.c b/src/common/freiton.c
index 3e8040d..7964c3f 100644
--- a/src/common/freiton.c
+++ b/src/common/freiton.c
@@ -1061,13 +1061,15 @@ static int16_t pattern[] = {
 	0x0095, 0x0042, 0x0006, 0x0036, 0x0000, 0x003a, 0x00a9, 0xfffa,
 };
 
-extern int16_t *freiton_spl;
-extern int freiton_size;
+extern int16_t *ringback_spl;
+extern int ringback_size;
+extern int ringback_max;
 
 void init_freiton(void)
 {
-	freiton_spl = pattern;
-	freiton_size = sizeof(pattern) / sizeof(pattern[0]);
+	ringback_spl = pattern;
+	ringback_size = sizeof(pattern) / sizeof(pattern[0]);
+	ringback_max = 8 * 5000;
 }
 
 
diff --git a/src/common/main.h b/src/common/main.h
index 9cd85c4..54c4fe3 100644
--- a/src/common/main.h
+++ b/src/common/main.h
@@ -10,7 +10,7 @@ extern int loopback;
 extern int rt_prio;
 
 void print_help(const char *arg0);
-void print_help_common(const char *arg0);
+void print_help_common(const char *arg0, const char *ext_usage);
 extern struct option *long_options;
 extern char *optstring;
 void set_options_common(const char *optstring_special, struct option *long_options_special);
diff --git a/src/common/main_common.c b/src/common/main_common.c
index 7675712..47a3ca3 100644
--- a/src/common/main_common.c
+++ b/src/common/main_common.c
@@ -37,9 +37,9 @@ int send_patterns = 1;
 int loopback = 0;
 int rt_prio = 0;
 
-void print_help_common(const char *arg0)
+void print_help_common(const char *arg0, const char *ext_usage)
 {
-	printf("Usage: %s -k kanal [options] [station-id]\n", arg0);
+	printf("Usage: %s -k <kanal/channel> %s[options] [station-id]\n", arg0, ext_usage);
 	printf("\noptions:\n");
 	/*      -                                                                             - */
 	printf(" -h --help\n");
diff --git a/src/common/timer.c b/src/common/timer.c
index a222c55..af5db91 100644
--- a/src/common/timer.c
+++ b/src/common/timer.c
@@ -74,6 +74,7 @@ void timer_start(struct timer *timer, double duration)
 
 	gettimeofday(&tv, NULL);
 
+	timer->duration = duration;
 	timer->timeout = get_time() + duration;
 }
 
diff --git a/src/common/timer.h b/src/common/timer.h
index 762dcc5..49136ab 100644
--- a/src/common/timer.h
+++ b/src/common/timer.h
@@ -2,6 +2,7 @@
 struct timer {
 	struct timer *next;
 	int linked; /* set is timer is initialized and linked */
+	double duration;
 	double timeout;
 	void (*fn)(struct timer *timer);
 	void *priv;