Add the contributed directory from the i4b tarball and the files from it

which would be nice to have.
Move isdnd_acct and isdnctl to the contrib directory where they belong to.

12 files changed, 1547 insertions, 4 deletions

diff --git a/share/examples/isdn/contrib/README b/share/examples/isdn/contrib/README
new file mode 100644
index 0000000..ae5969f
--- /dev/null
+++ b/share/examples/isdn/contrib/README
@@ -0,0 +1,42 @@
+$FreeBSD$
+
+This directory contains various unsupported contributions to isdn4bsd
+---------------------------------------------------------------------
+
+anleitung.ppp		Anleitung für syncPPP Internet-Zugang und 
+			Anrufbeantworter / FreeBSD 2.2.x / Teles.S0/16.3-Karte
+					(stefan@asterix.webaffairs.net)
+
+answer.c		answering machine in C by David Wetzel 
+							(dave@turbocat.de)
+
+answer.sh		a much better replacement for answer, tell and record
+			from Stefan Esser (se@freebsd.org)
+
+convert.sh		convert recorded message to WAV format, optionally
+			send it via mail. from Stefan Herrmann 
+					(stefan@asterix.webaffairs.net)
+
+hplay.c			isdn4bsd telephony output driver for the "rsynth"
+			package to play synthetic speech to a telephone
+			connection
+
+i4b-ppp-newbie.txt	setup PPP for isdn4bsd for newbies text from
+			Dominik Brettnacher <domi@saargate.de> (german)
+
+isdnctl			This script can control the state of your ISDN line.
+			It counts how many scripts/users currently use the
+			ISDN line and uses "ifconfig down" if noone uses it
+			any more.     Alexander Langer <alex@big.endian.de>
+
+isdnd_acct		the barebones isdnd accounting script
+
+isdnd_acct.pl		enhanced accounting from Joachim Kuebart
+					(joki@kuebart.stuttgart.netsurf.de)
+
+isdntelmux.c		a "record while play" program contributed by
+			Michael Reifenberger (Michael@Reifenberger.com)
+
+mrtg-isp0.sh		shell script and mrtg config entry to display 
+			callout and callback statistics with mrtg 
+			(www.mrtg.org) using the budget file statistics
diff --git a/share/examples/isdn/contrib/anleitung.ppp b/share/examples/isdn/contrib/anleitung.ppp
new file mode 100644
index 0000000..01466e2
--- /dev/null
+++ b/share/examples/isdn/contrib/anleitung.ppp
@@ -0,0 +1,142 @@
+$FreeBSD$
+
+i4b Anleitung für syncPPP Internet-Zugang und Anrufbeantworter
+unter FreeBSD 2.2.x mit Teles.S0/16.3-Karte
+===============================================================
+
+by Stefan Herrmann <stefan@asterix.webaffairs.net>
+
+
+Installation
+------------
+1)  Neues Verzeichnis "/usr/src/i4b" anlegen.
+
+2)  Ins Verzeichnis "/usr/src/i4b" wechseln und Sourcen entpacken.
+
+3)  Ins Verzeichnis "FreeBSD" wechseln und den Befehl "sh install.sh ausführen:
+    z.B. "root@asterix[0]/usr/src/i4b/FreeBSD # sh install.sh"
+
+    Wenn auf eine neuere Version von i4b gewechselt wird, zuerst
+    "sh uninstall.sh" ausführen, dann erst "sh install.sh"
+
+4)  Dann ins Verzeichnis "/usr/src/i4b" (zurück-)wechseln und die Befehle
+    "make depend", "make" und "make install" ausführen.
+
+5)  Nun muß der kernel mit neuen Optionen versehen werden. Dazu wird an die
+    Kernel-Konfigurationsdatei im Verzeichnis "/sys/i386/conf" folgendes ans
+    Ende hinzugefügt:
+
+# i4b passive ISDN cards support (isic - I4b Siemens Isdn Chipset driver)
+# note that the ``options'' and ``device'' lines must BOTH be defined !
+
+# Teles S0/16.3 
+options         "TEL_S0_16_3"
+device          isic0 at isa? port 0xd80 net irq 5 flags 0x04 vector isicintr
+
+# i4b passive cards D channel handling
+# Q.921
+pseudo-device   "i4bq921"
+# Q.931
+pseudo-device   "i4bq931"
+
+# common passive and active layer 4
+# layer 4
+pseudo-device   "i4b"
+
+# userland driver to do ISDN tracing (for passive cards oly)
+pseudo-device   "i4btrc"        4
+# userland driver to control the whole thing
+pseudo-device   "i4bctl"
+# userland driver for access to raw B channel
+pseudo-device   "i4brbch"       4
+# userland driver for telephony
+pseudo-device   "i4btel"        2
+# network driver for IP over raw HDLC ISDN
+pseudo-device   "i4bipr"        4
+# enable VJ header compression detection for ipr i/f
+options         IPR_VJ
+# network driver for sync PPP over ISDN
+pseudo-device   "i4bisppp"      4
+pseudo-device   sppp            4
+
+6)  Danach wird der kernel durch Eingabe der Befehle "make depend", "make" und
+    "make install" im Verzeichniss "/usr/src/sys/compile/<CONFIG>" neu
+    übersetzt und installiert.
+
+7)  Nach dem Booten kann man dann mit dem Befehl "dmesg" überprüfen, ob die
+    Karte korrekt erkannt wurde und alle erforderlichen Treiber installiert
+    sind.
+
+
+Konfiguration
+-------------
+8)  Die Konfiguration von i4b wird hauptsächlich im Verzeichnis "/etc/isdn"
+    druchgeführt, dort sucht der isdnd beim Start auch seine Konfigurations-
+    datei "isdnd.rc". Da vorgenanntes Verzeichnis nach der Installation aber
+    noch leer ist, kopiert man zuerst die Beispieldateien aus dem Verzeichnis
+    "/etc/isdn/samples" nach "/etc/isdn".
+
+9)  Die Datei "isdnd.rc" enthält schon recht aussagekräftige Kommentare zu den
+    einzelnen Optionen, weitere Informationen erhält man mit "man isdnd.rc" und
+    "man isdnd".
+
+10) Für syncPPP und Anrufbeantworter sind nur die Sektionen "SYSTEM",
+    "telephone answering" und "example for sPPP" notwendig, die Sektion
+    "IP over ISDN example" kann dafür also entfernt werden.
+
+11) Für den automatisierten Start des isp0 Interfaces und des isdnd erstellt
+    man nun ein Start-Skript. Dazu kopiert man die Datei
+    "/usr/src/i4b/etc/rc.isdn-PPP" nach "/etc/rc.isdn" und paßt sie
+    entsprechend an. Man beachte hierbei auch die FAQ "/usr/src/i4b/FAQ", die
+    Tips für die richtige Eintragung der IP-Adressen bereithält.
+
+12) Der Anrufbeantworter wird dadurch aktiviert, daß das entsprechende
+    Programm, das in "/etc/isdn/isdnd.rc" hinter dem Eintrag "answerprog = "
+    steht, aufgerufen wird. Wird dort kein Pfad angegeben, wird das Programm
+    im Verzeichniss "/etc/isdn" erwartet. Beispiele solcher Programme findet
+    man wiederum im Verzeichnis "/etc/isdn/samples". Sie nennen sich
+
+    "answer"		Nur Ansagetext abspielen, keine Aufzeichnungsmöglichkeit.
+    "record"		Ansage wird abgespielt, nach Piep-Ton kann gesprochen
+			werden.
+    "tell"		Als Ansagetext wird die anrufende Nummer gesprochen, keine
+			Aufzeichnung.
+    "tell-record"	Anrufende Nummer als Ansagetext, nach Piep-Ton kann ge-
+			sprochen werden.
+    "isdntel.sh"	Ansagetext und Aufzeichnung; mittels dem Programm "isdntel"
+			hat man die Kontrolle übe die Aufzeichnungen im Ver-
+			zeichniss "/var/isdn". Siehe auch "man isdntel" und
+			"man isdntelctl".
+
+    Diese Programme müssen an die eigenen Wünsche angepaßt werden. Leider gibt es
+    kein mitgeliefertes Programm, mit dem man so auch den Ansagetext aufsprechen
+    kann. Das ist aber nicht allzuschlimm, da man nur das Programm "record" dafür
+    etwas anpassen muß (Ansagetexte beep und msg auskommentieren). Damit die Anrufe
+    aufgezeichnet werden können, muß zuerst noch das Verzeichnis "/var/isdn"
+    angelegt werden. Dort werden dann alle Aufzeichnungen obiger Programme gespeichert.
+
+13) Man sollte sich auch noch die man-Pages der Programme "isdnd", "isdnctl",
+    "isdnd_acct", "isdndebug" und "isdntrace" zu Gemüte führen.
+
+
+Betrieb
+-------
+14) Der syncPPP Zugang zum Provider wird einfach mit dem Aufruf von
+    "/etc/rc.isdn" initialisiert. Jegliche Aktivitäten ins Internet (also z.B.
+    ein "ping 141.1.1.1") starten die Verbindung. Wenn in "/etc/isdn/isdnd.rc"
+    beim Eintrag "unitlengthsrc = " "rate" angegeben wurde, wird die Verbindung
+    kurz bevor die nächste Einheit begonnen wird, beendet. Informationen über
+    die Einheiten werden aus der Datei "/etc/isdn/isdnd.rates" ausgelesen
+    (Beispiele sind in "/etc/isdn/samples").
+
+    Mit "/etc/rc.isdn [restart|stop]" kann i4b entweder neu gestartet (z.B. zum
+    Einlesen der geänderten Konfiguration aus "isdnd.rc") oder beendet werden.
+
+15) Für den Anrufbeantworter muß nur der "isdnd" gestartet sein. Ein
+    ankommender Anruf wird dann automatisch angenommen (je nach den Einträgen
+    in "/etc/isdn/isdnd.rc").
+     
+16) Informationen über die Verbindung erhält man sowohl in "/var/log/messages",
+    also auch in "/var/log/isdnd.log" (so der isdnd mit der Option "-l"
+    gestartet wird) bzw. auf dem aktuellen tty (wenn der isdnd mit der Option
+    "-f" gestartet wird).
diff --git a/share/examples/isdn/contrib/answer.c b/share/examples/isdn/contrib/answer.c
new file mode 100644
index 0000000..da19aa9
--- /dev/null
+++ b/share/examples/isdn/contrib/answer.c
@@ -0,0 +1,178 @@
+// $FreeBSD$
+// changed ".g711a" to ".al" (-hm)
+// Tue Mar  3 02:42:14 MET 1998 	dave@turbocat.de
+// started
+
+#define BLK_SIZE	2048
+#define SOX		"/usr/local/bin/sox"
+#define	ALAWULAW	"/usr/local/bin/alaw2ulaw"
+
+#include <stdio.h>
+#include <time.h>
+
+	FILE	*device;
+	FILE	*logfile;
+	char	srcNum[30];
+	char	destNum[30];
+	char argbuf[255];
+	char tmpBuf[1024] = "";
+
+
+void writeToPhone (char *path)
+{
+	char 	buf[BLK_SIZE];
+	FILE	*srcfile;
+	int		i = 0;
+	int		readcount = 0;
+
+	srcfile = fopen(path,"r");
+	if (srcfile) {
+		for (i=0;i<BLK_SIZE;i++) {
+			buf[i] = '\0';
+		}
+		readcount = BLK_SIZE;
+		i = 0;
+		do {
+     		readcount = fread(buf,1, BLK_SIZE, srcfile);
+     		fwrite(buf, 1, readcount, device);
+			i = readcount + i;
+//			fprintf(logfile,"%d read (%d)\n",i,readcount);
+		} while (readcount == BLK_SIZE);
+	
+		fclose(srcfile);
+	} else {
+		fprintf(logfile,"Can't open file '%s'\n",path);
+	}
+}
+
+void readFromPhone (char *path)
+{
+	char 	buf[BLK_SIZE];
+	FILE	*destfile;
+	int		i = 0;
+	int		readcount = 0;
+
+	destfile = fopen(path,"a");
+	if (destfile) {
+		for (i=0;i<BLK_SIZE;i++) {
+			buf[i] = '\0';
+		}
+		readcount = BLK_SIZE;
+		i = 0;
+		do {
+     		readcount = fread(buf,1, BLK_SIZE, device);
+     		fwrite(buf, 1, readcount, destfile);
+			i = readcount + i;
+//			fprintf(logfile,"%d read (%d)\n",i,readcount);
+		} while (readcount == BLK_SIZE);
+	
+		fclose(destfile);
+	} else {
+		fprintf(logfile,"Can't open file '%s'\n",path);
+	}
+}
+
+void usage (void)
+{
+	fprintf(stderr,"Usage: answer -D device -d destination -s source\n");
+	exit(1); 
+}
+
+const char * argWithName (const char* aName)
+{
+	// '-D /dev/null -d 82834 -s 3305682834'
+	int i = 0;
+	int optionSeen = 0;
+	int startpos = 0;
+
+	for (i = 0; i < sizeof(tmpBuf);i++) {
+		tmpBuf[i] = '\0';
+	}
+
+	for (i = 0; i<strlen(argbuf);i++) {
+		if (optionSeen) {
+			for (;(i<strlen(argbuf) && (argbuf[i] != ' '));i++) {
+			}
+			i++;
+			startpos = i;
+
+			for (;(i<strlen(argbuf) && (argbuf[i] != ' '));i++) {
+			}
+			strncpy(tmpBuf,&argbuf[startpos], i-startpos);
+
+			return tmpBuf;
+		}
+		if (0 == strncmp(aName,&argbuf[i], strlen(aName))) {
+			optionSeen = 1;
+		}
+	}
+
+	usage();
+	return NULL;
+}
+
+int main (int argc, const char *argv[]) {
+
+	int i,pos = 0;
+	extern char *optarg;
+	extern int optind;
+	int bflag, ch;
+	char timeStr[50];
+	char outfileName[1024] = "";
+	char cmdStr[2048] = "";
+	time_t now;
+
+	now=time(NULL);
+
+	strftime(timeStr,40,I4B_TIME_FORMAT,localtime(&now));
+
+	logfile = fopen("/var/log/answer.log","a");
+
+	fprintf(logfile,"%s Started\n",timeStr);
+
+	pos=0;
+	for (i=1;i<argc;i++) {
+		sprintf(&argbuf[strlen(argbuf)],"%s ",argv[i]);
+	}
+	if (strlen(argbuf) > 2) {
+		argbuf[strlen(argbuf)-1] = '\0';
+	}
+
+
+	device = fopen(argWithName("-D"),"r+");
+	strcpy(destNum, argWithName("-d"));
+	strcpy(srcNum, argWithName("-s"));
+
+		fprintf(logfile,"device '%s'\n", argWithName("-D"));
+		fprintf(logfile,"srcNum '%s'\n", srcNum);
+		fprintf(logfile,"destNum '%s'\n", destNum);
+
+
+	if (device) {
+
+		strftime(timeStr,40,I4B_TIME_FORMAT,localtime(&now));
+
+		sprintf(outfileName,"/var/isdn/%s_%s_%s", timeStr, srcNum, destNum);
+
+		writeToPhone ("/usr/local/lib/isdn/msg.al");
+		readFromPhone (outfileName);
+
+		sprintf(cmdStr,"/bin/cat %s | %s | %s -t raw -U -b -r 8000 - -t .au %s.snd", outfileName, ALAWULAW, SOX, outfileName);
+		fprintf(logfile,"%s\n",cmdStr);
+		system(cmdStr);
+		unlink(outfileName);
+
+		fclose(device);
+	} else {
+		fprintf(logfile,"Can't open file '%s'\n",argWithName("-D"));
+	}
+
+	now=time(NULL);
+
+	strftime(timeStr,40,I4B_TIME_FORMAT,localtime(&now));
+
+	fprintf(logfile,"%s Done\n",timeStr);
+	fclose(logfile);
+    exit(0);       // insure the process exit status is 0
+    return 0;      // ...and make main fit the ANSI spec.
+}
diff --git a/share/examples/isdn/contrib/answer.sh b/share/examples/isdn/contrib/answer.sh
new file mode 100644
index 0000000..34073d3
--- /dev/null
+++ b/share/examples/isdn/contrib/answer.sh
@@ -0,0 +1,111 @@
+#!/bin/sh
+#---------------------------------------------------------------------------
+#
+#	answer script for i4b isdnd
+#	---------------------------
+#
+#	last edit-date: [Fri May 25 15:21:05 2001]
+#
+# $FreeBSD$
+#
+#---------------------------------------------------------------------------
+VARDIR=/var/isdn
+LIBDIR=/usr/local/lib/isdn
+LOGFILE=/tmp/answer.log
+
+NCALLFILE=$VARDIR/ncall
+DATE=`date +%d%H`
+
+progname=${0##*/}
+set -- $@		# have to split argument string !!!
+
+# ----------------------------------------------------------------------
+
+usage ()
+{
+	echo "usage: $progname -D device -d dest -s src"
+	exit 1
+}
+
+ncall ()
+{
+	nfile=$1
+	[ -f $nfile ] && read n < $nfile || n=0
+	echo $(($n + 1)) > $nfile
+	printf "%.4d" $n
+}
+
+# ----------------------------------------------------------------------
+
+while getopts "D:d:s:" opt
+do
+	case $opt
+	in
+D)		DEVICE=$OPTARG	;;
+d)		DEST=$OPTARG	;;
+s)		SRC=$OPTARG	;;
+	esac
+done
+
+[ -c "$DEVICE" -a -n "$DEST" -a -n "$SRC" ] || usage;
+
+shift $(($OPTIND - 1))
+
+# ----------------------------------------------------------------------
+
+NCALL=`ncall $NCALLFILE`
+
+echo "$progname: device $DEVICE destination $DEST source $SRC " >>$LOGFILE
+
+{
+	echo "Date:	"`date`
+	echo "From:	\"$SRC\""
+	echo "To:	\"$DEST\""
+	echo
+} >> $VARDIR/I.$NCALL.$DATE
+
+# ----------------------------------------------------------------------
+
+tellnumber ()
+{
+    number=$1
+    digits=`echo $number | sed -e 's/\(.\)/\1 /g'`
+
+    files=""
+    for digit in $digits
+    do
+	files="$files $LIBDIR/$digit.al"
+    done
+    cat $files
+}
+
+# ----------------------------------------------------------------------
+
+do_answer ()
+{
+	[ -f $LIBDIR/beep.al ] && cat $LIBDIR/beep.al
+	[ -f $LIBDIR/msg.al ]  && cat $LIBDIR/msg.al
+	[ -f $LIBDIR/beep.al ] && cat $LIBDIR/beep.al
+} > $DEVICE
+
+do_record ()
+{
+	cat $DEVICE > $VARDIR/R.$NCALL.$DATE
+}
+
+do_tell ()
+{
+	[ -f $LIBDIR/beep.al ] && cat $LIBDIR/beep.al
+	[ -f $LIBDIR/msg.al ]  && cat $LIBDIR/msg.al
+	tellnumber $SRC
+	[ -f $LIBDIR/beep.al ] && cat $LIBDIR/beep.al
+} > $DEVICE
+
+# ----------------------------------------------------------------------
+
+case $progname
+in
+answer)	do_answer		;;
+record)	do_answer; do_record	;;
+tell)	do_tell			;;
+esac
diff --git a/share/examples/isdn/contrib/convert.sh b/share/examples/isdn/contrib/convert.sh
new file mode 100644
index 0000000..b4a6e7d
--- /dev/null
+++ b/share/examples/isdn/contrib/convert.sh
@@ -0,0 +1,86 @@
+#!/bin/sh
+#
+# convert recorded message to WAV format, optionally send it via mail
+#
+# by:		Stefan Herrmann <stefan@asterix.webaffairs.net>
+# Date:	Fr  22 Mai 1998 14:18:40 CEST
+#
+# $FreeBSD$
+
+CAT=/bin/cat
+RM=/bin/rm
+SOX=/usr/local/bin/sox
+ALAW2ULAW=/usr/local/bin/alaw2ulaw
+MAIL=/usr/bin/mail
+GZIP=/usr/bin/gzip
+ZIP=/usr/local/bin/zip
+UUENCODE=/usr/bin/uuencode
+
+inputfile=""
+outfilename=""
+mailto=""
+iF=0
+oF=0
+mF=0
+
+set -- `getopt i:o:m: $*`
+
+if test $? != 0
+then
+        echo 'Usage: r2w -i <input file> -o <outfile name>.wav -m <email address>'
+        exit 1
+fi
+
+for i
+do
+        case "$i"
+        in
+                -i)
+                        inputfile=$2
+                        iF=1
+                        shift
+				shift
+                        ;;
+                -o)
+                        outfilename=$2
+                        oF=1
+                        shift
+				shift
+                        ;;
+                -m)
+                        mailto=$2
+                        mF=1
+                        shift
+				shift
+                        ;;
+                --)
+                        shift
+                        break
+                        ;;
+        esac
+done
+
+if [ $iF -eq 0 -o $oF -eq 0 ]
+then
+        echo 'Usage: r2w -i <input file> -o <outfile name>.wav -m <email address>'
+        exit 1
+fi
+
+if [ $iF -eq 1 -a $oF -eq 1 ]
+then
+	echo
+	echo "converting $inputfile to $outfilename.wav ..."
+
+	$CAT $inputfile | $ALAW2ULAW | $SOX -t raw -U -b -r 8000 - -t .wav $outfilename.wav
+fi
+
+if [ $iF -eq 1 -a $oF -eq 1 -a $mF -eq 1 ]
+then
+	echo "... and sending it via email to $mailto ..."
+	$UUENCODE $outfilename.wav message.wav | $MAIL -s"new message $outfilename" $mailto && $RM $outfilename.wav
+	# only usefull when sending over the internet
+	#$GZIP -c $outfilename.wav | $UUENCODE message.zip | $MAIL -s"Nachricht vom ISDN Anrufbeantworter" $mailto && $RM $outfilename.wav
+fi
+
+echo "done."
+echo
diff --git a/share/examples/isdn/contrib/hplay.c b/share/examples/isdn/contrib/hplay.c
new file mode 100644
index 0000000..10660ac
--- /dev/null
+++ b/share/examples/isdn/contrib/hplay.c
@@ -0,0 +1,241 @@
+/*---------------------------------------------------------------------------*
+ *
+ *	rsynth driver to output to 
+ *		- an open isdn4bsd telephone connection		or
+ *		- an output file				or
+ *		- the /dev/audio device
+ *      ----------------------------------------------------------------
+ *
+ *	tested with rsynth-2.0
+ *
+ *	written by Hellmuth Michaelis (hm@kts.org)
+ *
+ *	last edit-date: [Fri May 25 15:21:33 2001]
+ *
+ * $FreeBSD$
+ *
+ *---------------------------------------------------------------------------*/
+
+#include <config.h>
+#include <useconfig.h>
+#include <stdio.h>
+#include <math.h>
+#include <errno.h>
+#include <ctype.h>
+#include <fcntl.h>
+#include <sys/file.h>
+#include <sys/stat.h>
+#include <sys/param.h>
+#include <sys/signal.h>
+#include <sys/ioctl.h>
+
+#include <machine/i4b_tel_ioctl.h>
+
+#include "proto.h"
+#include "getargs.h"
+#include "hplay.h"
+#include "l2u.h"
+
+#define SAMP_RATE 8000
+long samp_rate = SAMP_RATE;
+
+char *prog = "hplay";
+
+static int use_audio = 1;
+static int use_isdn = 0;
+static int unit_no = 0;
+
+static int audio_fd = -1;
+static int isdn_fd = -1;
+static int file_fd = -1;
+
+char *audio_dev = "/dev/dsp";
+char *isdn_dev = "/dev/i4btel";
+static char *ulaw_file = NULL;
+
+int
+audio_init(int argc, char *argv[])
+{
+	char dev[64];
+	int format = CVT_ALAW2ULAW;
+
+	prog = argv[0];
+
+	argc = getargs("FreeBSD audio/i4b/file output driver",argc, argv,
+                "a", NULL, &use_audio, "use /dev/audio (default)",
+                "i", NULL, &use_isdn,  "use /dev/i4btel",
+		"u", "%d", &unit_no,   "/dev/i4btel unit number (def = 0)",
+                "f", "",   &ulaw_file, "u-law output to file",
+                NULL);
+
+	if(help_only)
+		return argc;
+
+	if(ulaw_file)
+	{
+		if(strcmp(ulaw_file, "-") == 0)
+		{
+			file_fd = 1;                 /* stdout */
+		}
+		else
+		{
+			file_fd = open(ulaw_file, O_WRONLY | O_CREAT | O_TRUNC, 0666);
+			if(file_fd < 0)
+				fprintf(stderr, "ERROR: cannot open %s, error = %s\n", ulaw_file, strerror(errno));
+		}
+	}
+
+	if(use_isdn)
+	{
+		sprintf(dev, "%s%d", isdn_dev, unit_no);
+	
+		if((isdn_fd = open(dev, O_WRONLY)) < 0)
+		{
+			fprintf(stderr, "ERROR: cannot open %s, error = %s\n", dev, strerror(errno));
+		}
+	
+		if((ioctl(isdn_fd, I4B_TEL_SETAUDIOFMT, &format)) < 0)
+	        {
+			fprintf(stderr, "ioctl I4B_TEL_SETAUDIOFMT failed: %s", strerror(errno));
+		}
+	}
+
+	if(use_audio)
+	{
+		audio_fd = open(audio_dev, O_WRONLY | O_NDELAY);
+		if(audio_fd < 0)
+  		{
+			fprintf(stderr, "ERROR: cannot open %s, error = %s\n", audio_dev, strerror(errno));
+		}
+	}
+
+	return argc;
+}
+
+void
+audio_term()
+{
+	int format = CVT_NONE;
+
+	if(isdn_fd >= 0)
+	{
+		if((ioctl(isdn_fd, I4B_TEL_SETAUDIOFMT, &format)) < 0)
+        	{
+			fprintf(stderr, "ioctl I4B_TEL_SETAUDIOFMT failed: %s", strerror(errno));
+		}
+		close(isdn_fd);
+		isdn_fd = -1;
+	}
+
+	if(audio_fd >= 0)
+	{
+#if 0
+		ioctl(audio_fd, SNDCTL_DSP_SYNC, &dummy);
+#endif
+		close(audio_fd);
+		audio_fd = -1;
+	}
+
+	if(file_fd >= 0)
+	{
+		close(file_fd);
+		file_fd = -1;
+	}
+}
+
+void
+audio_play(int n, short *data)
+{
+	int ret;
+	unsigned char *p;
+
+	if (n > 0)
+	{
+		unsigned char *converted = (unsigned char *) malloc(n);
+		int i;
+
+		if(converted == NULL)
+		{
+			fprintf(stderr, "Could not allocate memory for conversion\n");
+			exit(3);
+    		}
+
+		for (i = 0; i < n; i++)
+		{
+			converted[i] = short2ulaw(data[i]);
+		}
+
+   		if (isdn_fd >= 0)
+    		{
+			p = converted;
+			errno = 0;
+    			
+     			while((ret = write(isdn_fd, p, n)) != n)
+     			{
+     				if(!errno)
+     				{
+     					p += ret;
+     					if(p > (converted + n))
+     						break;
+     				}
+     				else
+     				{
+	     				fprintf(stderr, "write /dev/i4btel ERROR: ret (%d) != n (%d), error = %s\n", ret, n, strerror(errno));
+	     				break;
+	     			}
+			}
+    		}
+
+		for (i = 0; i < n; i++)
+			converted[i] = (data[i] - 32768) / 256;
+
+   		if(audio_fd >= 0)
+    		{
+			p = converted;
+
+			errno = 0;
+    			
+     			while((ret = write(audio_fd, p, n)) != n)
+     			{
+     				if(!errno)
+     				{
+     					p += ret;
+     					if(p > (converted + n))
+     						break;
+     				}
+     				else
+     				{
+	     				fprintf(stderr, "write /dev/dsp ERROR: ret (%d) != n (%d), error = %s\n", ret, n, strerror(errno));
+	     				break;
+	     			}
+			}
+    		}
+
+   		if(file_fd >= 0)
+    		{
+    			int ret;
+			p = converted;
+
+			errno = 0;
+    			
+     			while((ret = write(file_fd, p, n)) != n)
+     			{
+     				if(!errno)
+     				{
+     					p += ret;
+     					if(p > (converted + n))
+     						break;
+     				}
+     				else
+     				{
+	     				fprintf(stderr, "write file ERROR: ret (%d) != n (%d), error = %s\n", ret, n, strerror(errno));
+	     				break;
+	     			}
+			}
+    		}
+
+   		free(converted);
+  	}
+}
+
+/* EOF */
diff --git a/share/examples/isdn/contrib/i4b-ppp-newbie.txt b/share/examples/isdn/contrib/i4b-ppp-newbie.txt
new file mode 100644
index 0000000..7d6c4b0
--- /dev/null
+++ b/share/examples/isdn/contrib/i4b-ppp-newbie.txt
@@ -0,0 +1,237 @@
+$FreeBSD$
+
+                              PPP mit isdn4bsd
+     _________________________________________________________________
+   
+   Version 1.01
+   Datum: 22.02.1999
+   Autor: [1]Dominik Brettnacher <domi@saargate.de>
+   
+   - Anmerkungen und Verbesserungsvorschläge sind willkommen -
+   
+    1. vorab
+       Dieser Text soll Neulingen helfen, sich mittels isdn4bsd und BSD
+       per PPP z.B. bei ihrem Provider einwählen zu können.
+       isdn4bsd bringt einiges an Dokumentation und
+       Konfigurationsbeispielen mit, jedoch ist es nicht immer leicht,
+       die entsprechenden Hinweise gut miteinander zu kombinieren, so daß
+       am Schluß das dabei herauskommt, was man haben möchte.
+    2. Wo bekomme ich isdn4bsd?
+       hier solle es keine allzu großen Probleme geben: isdn4bsd ist auf
+       dem FTP-Server [2]ftp.consol.de erhältlich. Man beachte dabei, daß
+       man sich nicht, wie üblich, als anonymous, sondern als isdn4bsd
+       einloggen muß. Benutzer von Browsern geben als Adresse
+       [3]ftp://isdn4bsd@ftp.consol.de und als Passwort ihre
+       eMail-Adresse an.
+       Wertvolle Informationen findet man in der Datei README.
+    3. Welche ISDN-Karten werden unterstützt?
+       Informationen darüber findet man in der README-Datei.
+    4. Ich benutze einen externen ISDN-Adapter - was nun?
+       Externe Adapter benötigen keine direkte Unterstützung, weil sie
+       über die serielle Schnittstelle angesteuert werden. Man kann also
+       das normale PPP benutzen. man ppp hilft hier sicher weiter.
+    5. isdn4bsd installieren
+       Wie man isdn4bsd installiert, steht in der Datei
+       FreeBSD/INSTALLATION (für NetBSD und OpenBSD analog). Eine
+       Beispielkonfiguration des Kernel sieht so aus:
+[...]
+#
+# i4b passive ISDN cards support (isic - I4b Siemens Isdn Chipset driver)
+# note that the ``options'' and ``device'' lines must BOTH be defined !
+#
+# Non-PnP Cards:
+# --------------
+#
+# AVM A1 or AVM Fritz!Card
+options "AVM_A1"
+device    isic0 at isa? port 0x300 net irq 15 flags 4 vector isicintr
+#
+# ISDN Protocol Stack
+# -------------------
+#
+# Q.921 / layer 2 - i4b passive cards D channel handling
+pseudo-device  "i4bq921"
+#
+# Q.931 / layer 3 - i4b passive cards D channel handling
+pseudo-device  "i4bq931"
+#
+# layer 4 - i4b common passive and active card handling
+pseudo-device  "i4b"
+#
+# ISDN devices
+# ------------
+#
+# userland driver to do ISDN tracing (for passive cards only)
+pseudo-device   "i4btrc" 4
+#
+# userland driver to control the whole thing
+pseudo-device   "i4bctl"
+#
+# userland driver for access to raw B channel
+#pseudo-device   "i4brbch"       4
+#
+# userland driver for telephony
+#pseudo-device   "i4btel"        2
+#
+# network driver for IP over raw HDLC ISDN
+#pseudo-device   "i4bipr"     4
+# enable VJ header compression detection for ipr i/f
+#options       IPR_VJ
+#
+# network driver for sync PPP over ISDN
+pseudo-device  "i4bisppp"     1
+pseudo-device  sppp      1
+#
+#---------------------------------------------------------------------------
+[...]
+       Nachdem ein neuer Kernel kompiliert und das System neugestartet
+       wurde, kann es weiter gehen.
+    6. Konfiguration isdnd.rc
+       Die für ISDN wichtigste Konfigurationsdatei ist
+       /etc/isdn/isdnd.rc. Mit man isdnd.rc erhält man Informationen über
+       die Einstellungen, die man dort vornehmen kann. Im Folgenden ein
+       Beispiel:
+
+
+#==============================================================================
+# SYSTEM section: isdnd global configuration parameters
+#==============================================================================
+system
+
+# accounting
+# ----------
+
+acctall         = on                    # generate info for everything
+acctfile        = /var/log/isdnd.acct   # name & location of accounting file
+useacctfile     = yes                   # generate accouting info to file
+
+# monitor
+# -------
+
+monitor-allowed = no                    # global switch: monitor on/off
+monitor-port    = 451                   # default monitor TCP port
+
+# Monitor rights are granted due to the most specific host/net spec, i.e. in
+# the example below host 192.168.1.2 will have the rights specified on that
+# line, even so it belongs to net 192.168.1.0/24 as well.
+#
+# A monitor specification may either be:
+#
+#  - the name of a local (UNIX-domain) socket; this MUST start with a "/"
+monitor         = "/var/run/isdn-monitor"
+monitor-access  = fullcmd
+monitor-access  = channelstate, logevents
+monitor-access  = callin, callout
+
+# ratesfile
+# ---------
+
+ratesfile       = /etc/isdn/isdnd.rates # name & location of rates file
+
+# regular expression pattern matching
+# -----------------------------------
+
+#regexpr        = "connected.*KTS"      # look for matches in log messages
+#regprog        = connectKTS            # execute program when match is found
+
+# realtime priority section
+# -------------------------
+
+rtprio          = 25                    # modify isdnd's process priority
+
+###############################################################################
+entry
+name                    = lf
+usrdevicename           = isp
+usrdeviceunit           = 0
+isdncontroller          = 0
+isdnchannel             = -1
+local-phone-incoming    = 012345678
+remote-phone-incoming   = 876543210
+local-phone-dialout     = 012345678
+remote-phone-dialout    = 876543210
+remdial-handling        = first
+dialin-reaction         = accept
+dialout-type            = normal
+b1protocol              = hdlc
+idletime-incoming       = 240
+idletime-outgoing       = 30
+earlyhangup             = 5
+ratetype                = 0
+unitlength              = 90
+unitlengthsrc           = rate
+dialretries             = 3
+dialrandincr            = on
+recoverytime            = 25
+
+connectprog             = is-up
+disconnectprog          = is-down
+
+       Wichtig sind hier für den Neuling die vier *-phone-* Einträge, die
+       jeweils die lokale Rufnummer und die der Gegenstelle für ein- und
+       ausgehende Verbindungen angeben.
+   
+    7. ISDN-Verbindungen aufbauen
+       um ISDN-Verbindungen aufzubauen, bedarf es einiger Befehle, die
+       beim Systemstart aufgerufen werden. Man kann sie zum Beispiel am
+       Ende von /etc/rc.local unterbringen. Hier gibt es aber durchaus
+       noch andere Lösungen:
+       [...]
+       # start ISDN
+       echo -n 'ppp / ISDN...'
+       echo -n 'isdnd...'
+       /usr/local/bin/isdnd
+       echo -n 'ifconfig...'
+       ifconfig isp0 link1 0.0.0.0 1.1.1.1 netmask 0xffffff00
+       ifconfig isp0 down
+       echo -n 'sppp...'
+       spppcontrol isp0 myauthproto=pap myauthname="xxx"
+       myauthsecret="xxx" hisauthproto=none
+       echo -n 'ifconfig...'
+       ifconfig isp0 up
+       echo -n 'setting routes...'
+       route add default -interface isp0
+       echo '.'
+       Ändern muß man hier eventuell die Zieladresse des Providers (im
+       Beispiel 1.1.1.1). Man bekommt diese entweder vom Provider, oder
+       aber man muß einen Versuch daransetzen, sie selbst herauszufinden.
+       Wie das funktioniert, steht in der Datei FAQ des isdn4bsd-Paketes.
+       Auch am Aufruf von spppcontrol (Vorsicht: spppcontrol bis
+       hisauthproto=none ist eine Zeile!) muß noch etwas umgestellt
+       werden:
+          + myauthproto steht für das Authentifizierungsprotokoll.
+            Möglich sind pap oder chap.
+          + myauthname ist der PPP-Benutzername.
+          + myauthsecret ist das PPP-Kennwort.
+       Wenn man nun die Befehle in /etc/rc.local ausführt, kann man mit
+       einem ping auf eine beliebige Adresse außerhalb des lokalen Netzes
+       eine Verbindung öffnen. Sie wird automatisch nach einiger
+       Inaktivität (siehe isdnd.rc) wieder geschlossen.
+   
+    8. Es funktioniert nicht - was kann ich tun?
+       Es gibt einige Möglichkeiten zur Fehlerdiagnose:
+          + dmesg gibt Aufschluß darüber, ob die Karte richtig erkannt
+            wurde.
+          + ifconfig (siehe rc.local) kann mit dem Parameter debug
+            aufgerufen werden und gibt dann einiges an Informationen aus.
+          + die Nachrichten in /var/log/messages können außerdem
+            hilfreich sein
+   
+    9. wer kann mir helfen?
+          + die erste Adresse für ISDN-Probleme ist die Mailingliste
+            [4]freebsd-isdn@freebsd.org - man bestellt sie, indem man
+            eine Mail mit dem Text subscribe freebsd-isdn an
+            [5]majordomo@freebsd.org schickt.
+          + auch die deutschsprachige Mailingliste kann hilfreich sein.
+            Mit einer Mail an [6]majordomo@de.freebsd.org, die im Text
+            subscribe de-bsd-questions enthält bestellt man sie.
+     _________________________________________________________________
+
+References
+
+   1. mailto:domi@saargate.de
+   2. ftp://isdn4bsd@ftp.consol.de/
+   3. ftp://isdn4bsd@ftp.consol.de/
+   4. mailto:freebsd-isdn@freebsd.org
+   5. mailto:majordomo@freebsd.org
+   6. mailto:majordomo@de.freebsd.org
diff --git a/share/examples/isdn/isdnctl b/share/examples/isdn/contrib/isdnctl
index f9de44f..f9de44f 100644
--- a/share/examples/isdn/isdnctl
+++ b/share/examples/isdn/contrib/isdnctl
diff --git a/share/examples/isdn/isdnd_acct b/share/examples/isdn/contrib/isdnd_acct
index be97a4a..21223b7 100644
--- a/share/examples/isdn/isdnd_acct
+++ b/share/examples/isdn/contrib/isdnd_acct
@@ -29,11 +29,9 @@
 #	accounting report script for the isdnd daemon accounting info
 #	-------------------------------------------------------------
 #
-# $FreeBSD$
-#
-#	last edit-date: [Wed May  5 16:24:16 1999]
+#	last edit-date: [Fri May 25 15:28:20 2001]
 #
-#	-hm	updated for isdnd support
+# $FreeBSD$
 #
 #---------------------------------------------------------------------------
 
diff --git a/share/examples/isdn/contrib/isdnd_acct.pl b/share/examples/isdn/contrib/isdnd_acct.pl
new file mode 100644
index 0000000..0306216
--- /dev/null
+++ b/share/examples/isdn/contrib/isdnd_acct.pl
@@ -0,0 +1,258 @@
+#!/usr/bin/perl
+#
+#ich habe zwei vielleicht n?tzliche Erweiterungen an isdn_pacct
+#gemacht:
+#
+#        1) Man kann den Namen der Accounting-Datei angeben. Ich
+#           habe Accounting-Files nach Telekom-Rechnung aufgeteilt
+#           und kann diese so sehr sch?n nachvollziehen.
+#
+#        2) Die Abrechnung wird nach Einheitenl?ngen aufgelistet.
+#           Leider wird zur Zeit immer Nahzone verwendet (isdnd.rates
+#           wird ausgelesen), und Feiertage stehen als erstes auf
+#           der TODO-Liste. Wenn man dieses Feature durch einen
+#           Switch anschaltet, kann man es sogar unauff?llig in die
+#           Distribution aufnehmen.
+#
+#           Mir hilft diese Abrechnung, an mir zu arbeite und mehr
+#           Tests und Zug?nge nachts durchzuf?hren... Aber die meisten
+#           Einheiten werden immer noch im 90s-Takt verbraucht :-(
+#
+# $FreeBSD$
+#
+#---------------------------------------------------------------------------
+#
+# Copyright (c) 1994, 1996 Hellmuth Michaelis. All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in the
+#    documentation and/or other materials provided with the distribution.
+# 3. All advertising materials mentioning features or use of this software
+#    must display the following acknowledgement:
+#	This product includes software developed by Hellmuth Michaelis
+# 4. Neither the name of the author nor the names of any co-contributors
+#    may be used to endorse or promote products derived from this software
+#    without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+# SUCH DAMAGE.
+#
+#---------------------------------------------------------------------------
+#
+#	accounting script for the isdn daemon accounting info
+#	-----------------------------------------------------
+#
+#	last edit-date: [Fri May 25 15:22:26 2001]
+#
+#	-hm	my first perl program :-)
+#	-hm	sorting the output
+#	-hm	adding grand total
+#
+#---------------------------------------------------------------------------
+
+sub wday {
+	local ($y, $m, $d) = @_;
+	local ($nday, @mon);
+
+	@mon = (0, 31, 61, 92, 122, 153, 184, 214, 245, 275, 306, 337);
+#	        M  A   M   J   J    A    S    O    N    D    J    F
+
+	if ($m > 2) {
+		$m -= 3;
+	} else {
+		$m += 9;
+		$y--;
+	}
+	if ($y < 1600) {
+		return -1;
+	}
+	$y -= 1600;
+	$nday = $y * 365 + $mon[$m] + $d +
+		int($y / 4) - int($y / 100) + int($y / 400);
+	($nday + 2) % 7;
+}
+
+# where the isdnd accounting file resides
+if ($#ARGV == 0) {
+	$ACCT_FILE = $ARGV[0];
+} else {
+	$ACCT_FILE = "/var/log/isdnd.acct";
+}
+
+# $PERIOD_FILE = "/usr/local/etc/isdnd.periods";
+# # read periods that need to be separately listed
+# if (open(IN, $PERIOD_FILE)) {
+# 	while (<IN>) {
+# 		chop;
+# 		($start, $end) = split(/ /);
+# 		push(@p_start, $start);
+# 		push(@p_end, $end);
+# 	}
+# 	close(IN);
+# }
+
+$RATES_FILE = "/etc/isdn/isdnd.rates";
+if (open(IN, $RATES_FILE)) {
+	while(<IN>) {
+		chop;
+		if (! /^ra0/) {
+			next;
+		}
+		($ra0, $day, $rest) = split(/[ \t]+/, $_, 3);
+		@periods = split(/[ \t]+/, $rest);
+		foreach $period (@periods) {
+			($h_start, $m_start, $h_end, $m_end, $secs) = 
+				$period =~ /(.+)\.(.+)-(.+)\.(.+):(.+)/;
+			for ($h = int($h_start); $h < $h_end; $h++) {
+				$secs{$day, $h} = $secs;
+			}
+		}
+	}
+	close(IN);
+}
+
+# the charge for a unit, currently 0,12 DM
+$UNIT_PRICE = 0.12;
+
+# open accounting file
+open(IN, $ACCT_FILE) ||
+	die "ERROR, cannot open $ACCT_FILE !\n";
+
+# set first thru flag
+$first = 1;
+
+# process file line by line
+while (<IN>)
+{
+	# remove ( and ) from length and bytecounts
+	tr/()//d;
+
+	# split line into pieces
+	($from_d, $from_h, $dash, $to_d, $to_h, $name, $units, $secs, $byte)
+		= split(/ /, $_);
+
+	# get starting date
+	if($first)
+	{
+		$from = "$from_d $from_h";
+		$first = 0;
+	}
+
+	# split bytecount
+	($inb, $outb) = split(/\//, $byte);
+
+	# if user wants to account time periods, put this to the right
+	# slot(s)
+	($hour, $minute, $second) = split(/:/, $from_h);
+	($day, $mon, $year) = split(/\./, $from_d);
+	$day = &wday('19' . $year, $mon, $day);
+	if ($secs{$day, int($hour)}) {
+		$secs = $secs{$day, int($hour)};
+		# process fields
+		$p_secs{$name, $secs} += $secs;
+		$p_calls{$name, $secs}++;
+		$p_units{$name, $secs} += $units;
+		$p_charge{$name, $secs} += $units * $UNIT_PRICE;
+		$p_inbytes{$name, $secs} += $inb;
+		$p_outbytes{$name, $secs} += $outb;
+		$p_bytes{$name, $secs} = $p_bytes{$name, $secs} + $inb + $outb;
+	}
+
+	# process fields
+	$a_secs{$name} += $secs;
+	$a_calls{$name}++;
+	$a_units{$name} += $units;
+	$a_charge{$name} += $units * $UNIT_PRICE;
+	$a_inbytes{$name} += $inb;
+	$a_outbytes{$name} += $outb;
+	$a_bytes{$name} = $a_bytes{$name} + $inb + $outb;
+}
+
+# close accouting file
+close(IN);
+
+# write header
+print "\n";
+print "     ISDN Accounting Report   ($from -> $to_d $to_h)\n";
+print "     =================================================================\n";
+
+#write the sum for each interface/name
+foreach $n (sort(keys %a_secs))
+{
+	$o_secs = $a_secs{$n};
+	$gt_secs += $o_secs;
+	$o_calls = $a_calls{$n};
+	$gt_calls += $o_calls;
+	$o_units = $a_units{$n};
+	$gt_units += $o_units;
+	$o_charge = $a_charge{$n};
+	$gt_charge += $o_charge;
+	$o_inbytes = $a_inbytes{$n};
+	$gt_inbytes += $o_inbytes;
+	$o_outbytes = $a_outbytes{$n};
+	$gt_outbytes += $o_outbytes;
+	$o_bytes = $a_bytes{$n};
+	$gt_bytes = $o_bytes;
+	$name = $n;
+	write;
+
+	foreach $i (keys %p_secs) {
+		($nam, $secs) = split(/$;/, $i);
+		if ($nam ne $n) {
+			next;
+		}
+		$o_secs = $p_secs{$i};
+		$o_calls = $p_calls{$i};
+		$o_units = $p_units{$i};
+		$o_charge = $p_charge{$i};
+		$o_inbytes = $p_inbytes{$i};
+		$o_outbytes = $p_outbytes{$i};
+		$o_bytes = $p_bytes{$i};
+		$name = sprintf(' %5.1fs', $secs / 10);
+		write;
+	}
+}
+
+$o_secs = $gt_secs;
+$o_calls = $gt_calls;
+$o_units = $gt_units;
+$o_charge = $gt_charge;
+$o_inbytes = $gt_inbytes;
+$o_outbytes = $gt_outbytes;
+$o_bytes = $gt_bytes;
+$name = "Total";
+
+print "======= ====== ===== ===== ======== ============ ============ ============\n";
+write;
+
+print "\n\n";
+exit;
+
+# top of page header
+format top =
+
+Name    charge units calls     secs      inbytes     outbytes        bytes
+------- ------ ----- ----- -------- ------------ ------------ ------------
+.
+
+# record template
+format STDOUT =
+@<<<<<< @##.## @#### @#### @####### @########### @########### @###########
+$name,  $o_charge, $o_units, $o_calls, $o_secs, $o_inbytes, $o_outbytes, $o_bytes
+.
+
+# EOF
diff --git a/share/examples/isdn/contrib/isdntelmux.c b/share/examples/isdn/contrib/isdntelmux.c
new file mode 100644
index 0000000..318ebfc
--- /dev/null
+++ b/share/examples/isdn/contrib/isdntelmux.c
@@ -0,0 +1,197 @@
+/*
+ * Copyright (c) 1999 Michael Reifenberger (Michael@Reifenberger.com). 
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *---------------------------------------------------------------------------
+ *
+ *	i4btemux - record while playing
+ *      ===============================
+ *
+ * $FreeBSD$
+ *
+ *----------------------------------------------------------------------------*/
+
+#include<stdio.h>
+#include<stdarg.h>
+#include<signal.h>
+#include<errno.h>
+#include<string.h>
+#include<stdlib.h>
+#include<unistd.h>
+#include<fcntl.h>
+#include<ctype.h>
+#include<sys/stat.h>
+#include<sys/wait.h>
+#include<sys/ioctl.h>
+#include<sys/types.h>
+#include<sys/time.h>
+#include<sys/param.h>
+#include<machine/i4b_tel_ioctl.h>
+
+// DECL DEFS
+#define BUFLEN 2048
+#define MAXBLOCKS_DEFAULT 23
+
+// DECL VARS
+int ibytes = 0;
+int obytes = 0;
+int maxbytes = (BUFLEN * MAXBLOCKS_DEFAULT);
+
+int xfd = -1, xact = 0;
+int ifd = -1, iact = 0;
+int ofd = -1;
+FILE *dfp = NULL;
+int opt_dbg = 0;
+int maxfd = 0;
+fd_set set;
+struct timeval timeout;
+char nambuf[PATH_MAX];
+int ch;
+
+// DECL FUNC
+void ifd_hdlr( void);
+void xfd_hdlr( void);
+void usage( void);
+void dbg( char *fmt, ... );
+
+// DEF FUNC
+int main (int argc, char **argv) {
+  int dummy;
+  int x = -1;
+
+  dfp = stderr;
+  while( ( ch = getopt( argc, argv, "x:i:o:b:D:")) != -1 ){
+    switch(ch){
+      case 'b':
+        x = atoi(optarg);
+        maxbytes = x * BUFLEN;
+        break;
+      case 'i':
+        ifd = open( optarg, O_RDONLY );
+        iact = 1;
+        break;
+      case 'o':
+        ofd = open( optarg, O_WRONLY|O_TRUNC|O_CREAT );
+        break;
+      case 'x':
+        xfd = open( optarg, O_RDWR );
+        xact = 1;
+        break;
+      case 'D':
+        opt_dbg = 1;
+        if( (dfp = fopen( optarg, "w" )) < 0) {
+          dfp = stderr;
+          dbg("Err for opening %s\n", optarg);
+          exit(1);
+        }
+        break;
+      case '?':
+      default:
+        usage();
+        break;
+    }
+  }
+  if( ( xfd < 0 ) || ( ifd < 0 ) || ( ofd < 0 ) ) {
+    dbg("Err opening one ore more Files.\n");
+    dbg("xfd: %d, ifd: %d, ofd: %d\n", xfd, ifd, ofd );
+    usage();
+  }
+
+  if((x = ioctl(xfd, I4B_TEL_EMPTYINPUTQUEUE, &dummy)) < 0){
+    dbg("Err I4B_TEL_EMPTYINPUTQUEUE\n");
+  }
+
+  while( (iact == 1) || ( (obytes < maxbytes) && (xact == 1) ) ){
+    FD_ZERO( &set);
+    if( iact == 1){
+      FD_SET( ifd, &set);
+      if( ifd > maxfd)
+        maxfd = ifd; 
+      dbg("FSET ifd\n");
+    }
+    if( xact == 1){
+      FD_SET( xfd, &set);
+      if( xfd > maxfd)
+        maxfd = xfd; 
+      dbg("FSET xfd\n");
+    }
+    x=select( maxfd+1, &set, NULL, NULL, NULL);
+    if( x > 0){
+      if( (iact == 1) && FD_ISSET( ifd, &set) ){
+        ifd_hdlr();
+      }
+      if( (xact == 1) && FD_ISSET( xfd, &set) ){
+        xfd_hdlr();
+      }
+    }
+  }
+  dbg("exit0\n");
+  return(0);
+}
+
+void ifd_hdlr( void) {
+  int x;
+  unsigned char buf[BUFLEN];
+
+  x = read( ifd, buf, BUFLEN); 
+  dbg("ifd read %d bytes\n", x);
+  if( x > 0 ){
+    write( xfd, buf, x);
+    ibytes += x;
+    dbg("xfd %d bytes written to %d\n", x, ibytes);
+  } else {
+    iact = 0;
+  }
+}
+
+void xfd_hdlr( void) {
+  int x;
+  unsigned char buf[BUFLEN];
+
+  x = read( xfd, buf, BUFLEN);
+  dbg("xfd read %d bytes\n", x);
+  if( x > 0){
+    write( ofd, buf, x);
+    obytes += x;
+    dbg("ofd %d bytes written to %d\n", x, obytes);
+  } else {
+    xact = 0;
+  }
+}
+
+void usage( void) {
+  fprintf(dfp, "isdntelmux V.1\n");
+  fprintf(dfp, "usage: isdntelmux -x device -i ifile -o ofile [-b blocks]\n");
+  exit(1);
+}
+
+void dbg( char *fmt, ... ) {
+  va_list ap;
+
+  if( opt_dbg == 0 )
+    return;
+  va_start( ap, fmt );
+  vfprintf( dfp, fmt, ap);
+  va_end(ap);
+}
diff --git a/share/examples/isdn/contrib/mrtg-isp0.sh b/share/examples/isdn/contrib/mrtg-isp0.sh
new file mode 100644
index 0000000..bdc9671
--- /dev/null
+++ b/share/examples/isdn/contrib/mrtg-isp0.sh
@@ -0,0 +1,53 @@
+#!/bin/sh
+#---------------------------------------------------------------------------
+#
+#	collect callout and callback statistics for the isp0 i/f
+#
+#	enable budget callout and callback restrictions and file
+#	rotation in the isdnd.rc file.
+#
+#	last edit-date: [Fri May 25 15:22:45 2001]
+#
+# $FreeBSD$
+#
+#---------------------------------------------------------------------------
+#
+#---------------------------------------------------------------------------
+# this is the entry for mrtg in mrtg.cfg
+#---------------------------------------------------------------------------
+# Target[ernie.cstat.isp0]: `/usr/local/etc/mrtg/util/mrtg-isp0.sh`
+# MaxBytes[ernie.cstat.isp0]: 10
+# AbsMax[ernie.cstat.isp0]: 200
+# Title[ernie.cstat.isp0]: isp0: callouts / callbacks
+# PageTop[ernie.cstat.isp0]: <H1> isp0: callouts /callbacks </H1>
+# Options[ernie.cstat.isp0]: gauge, nopercent, integer
+# YLegend[ernie.cstat.isp0]: co / cb
+# ShortLegend[ernie.cstat.isp0]: n
+# Legend1[ernie.cstat.isp0]: callouts
+# Legend2[ernie.cstat.isp0]: callbacks
+# LegendI[ernie.cstat.isp0]: callouts:
+# LegendO[ernie.cstat.isp0]: callbacks:
+# WithPeak[ernie.cstat.isp0]: ymwd
+#
+#---------------------------------------------------------------------------
+#	this is the shell script run by mrtg
+#---------------------------------------------------------------------------
+if [ -r /var/log/isdn/callouts.isp0 ]
+then
+        cat /var/log/isdn/callouts.isp0 | awk '{print $3}'
+else
+        echo 0
+fi
+
+if [ -r /var/log/isdn/callbacks.isp0 ]
+then
+        cat /var/log/isdn/callbacks.isp0 | awk '{print $3}'
+else
+        echo 0
+fi
+
+uptime | cut -c 12-18
+uname -nsr
+
+exit 0
+