diff --git a/channels/Makefile b/channels/Makefile
new file mode 100755
index 0000000000000000000000000000000000000000..7d68f258fdb222d029aa75230c5d83eb888e6a44
--- /dev/null
+++ b/channels/Makefile
@@ -0,0 +1,27 @@
+#
+# Asterisk -- A telephony toolkit for Linux.
+# 
+# Makefile for Channel backends (dynamically loaded)
+#
+# Copyright (C) 1999, Adtran Inc. and Linux Support Services, LLC
+#
+# Mark Spencer <markster@linux-support.net>
+#
+# This program is free software, distributed under the terms of
+# the GNU General Public License
+#
+
+CHANNEL_LIBS=chan_vofr.so chan_ixj.so
+
+CFLAGS+=#-DVOFRDUMPER
+
+all: $(CHANNEL_LIBS)
+
+clean:
+	rm -f *.so *.o
+
+%.so : %.o
+	$(CC) -shared -Xlinker -x -o $@ $<
+
+install: all
+	for x in $(CHANNEL_LIBS); do $(INSTALL) -m 755 $$x $(MODULES_DIR) ; done
diff --git a/channels/ixjuser.h b/channels/ixjuser.h
new file mode 100755
index 0000000000000000000000000000000000000000..698a68bb1ea4a9a3480e0e5d8f1980cf93ce8713
--- /dev/null
+++ b/channels/ixjuser.h
@@ -0,0 +1,827 @@
+/******************************************************************************
+$Id$
+$Log$
+Revision 1.1  1999/12/01 05:25:58  markster
+Version 0.1.0 from FTP
+
+Revision 1.1  1999/12/01 05:25:58  markster
+Start on the Internet Phone Jack channel
+
+Revision 3.0  1999/11/18 22:21:43  root
+Added isapnp kernel module support.
+
+Revision 2.5  1999/11/09 15:42:06  root
+Fixed convert code for older PhoneJACK cards.
+Fixed G723.1 5.3 record bug.
+
+Revision 2.4  1999/11/02 20:17:20  root
+Fixed hookswitch bug for PhoneJACK
+Added filter exception bit code.
+
+Revision 2.3  1999/11/01 23:22:02  root
+Added tone cadence generation.
+Fixed hookswitch detection when PORT != POTS
+Fixed ringing when PORT != POTS
+
+Revision 2.2  1999/10/13 05:33:31  root
+Added G.729A/B codec.
+Fixed G.728 codec.
+
+Revision 2.1  1999/10/11 19:29:46  root
+Enhanced PSTN ring detection
+Added Caller ID recognition
+Added wink detection
+
+Revision 2.0  1999/09/18 03:29:15  root
+Added PSTN Support
+Enhanced mixer functions
+Fixed LineJACK and PhoneJACK Lite not reporting second IO range in p/proc/ioports
+Added DSP Volume controls
+
+Revision 1.23  1999/08/16 16:37:27  root
+Added drybuffer ioctls
+Added card type ioctl
+
+Revision 1.22  1999/08/14 05:15:58  root
+Fixed select timeout problems.  Was using the wrong wait queues.
+
+Revision 1.21  1999/08/04 22:53:43  root
+Added levels to AEC
+
+Revision 1.20  1999/07/28 20:32:23  root
+Added non-blocking rings
+Added ring cadence
+
+Revision 1.19  1999/07/14 21:08:10  root
+fixed rcsid
+
+Revision 1.18  1999/07/14 21:03:33  root
+added rcsid
+
+Revision 1.17  1999/07/12 20:20:00  root
+Continuing work on 20ms and 10ms linear modes.
+
+Revision 1.16  1999/07/09 19:13:50  root
+Added IXJCTL_RATE to set the rate the DSP is polled.
+Added 20ms and 10ms linear modes for LineJack and PhoneJack Lite.
+
+Revision 1.15  1999/07/08 02:21:20  root
+Async Notification on hookswitch changes.
+Added IXJ_EXCEPTION bitfield structure for select exception sets
+Added IXJCTL_DTMFASCII ioctl
+
+Revision 1.14  1999/07/06 23:20:52  root
+*** empty log message ***
+
+Revision 1.14  1999/07/06 21:48:38  root
+Fixed lockups in linear modes during write.
+
+Revision 1.13  1999/06/28 18:30:44  root
+Added buffer depth commands to reduce latency in compressed modes.
+
+Revision 1.12  1999/06/25 21:03:18  root
+Close device properly.
+Started Mixer code for LineJack
+
+Revision 1.11  1999/06/24 21:51:21  root
+bug fixes
+
+Revision 1.10  1999/06/17 18:23:16  root
+Added tone generation.
+Fixed LineJack hookswitch again.
+
+Revision 1.9  1999/06/09 14:18:15  root
+Fixed duplicate IOCTL numbers
+
+Revision 1.8  1999/06/09 14:13:29  root
+Added DTMF Recognition with Async Notification
+
+Revision 1.7  1999/06/03 16:50:43  root
+Added IXJCTL_HZ to allow changing the HZ value the driver uses.
+
+Revision 1.6  1999/05/31 17:56:07  root
+All linear modes now work properly.
+
+Revision 1.5  1999/05/25 14:05:44  root
+Added multiple codec selections.
+
+Revision 1.4  1999/04/28 03:43:52  root
+More work on echo cancellation
+
+Revision 1.3  1999/04/27 17:17:12  root
+added AEC
+
+Revision 1.2  1999/04/22 11:43:52  root
+Fixed stability problems
+
+Revision 1.1  1999/03/25 21:52:42  root
+Initial revision
+
+*
+* IOCTL's used for the Quicknet Cards
+*
+* If you use the IXJCTL_TESTRAM command, the card must be power cycled to
+* reset the SRAM values before futher use.
+*
+******************************************************************************/
+static char ixjuser_h_rcsid[] = "$Id$";
+
+#define IXJCTL_DSP_RESET 		_IO  ('q', 0x80)
+#define IXJCTL_RING                     _IO  ('q', 0x82)
+#define IXJCTL_HOOKSTATE                _IO  ('q', 0x83)
+#define IXJCTL_MAXRINGS			_IOW ('q', 0x84, char)
+#define IXJCTL_RING_CADENCE		_IOW ('q', 0x85, short)
+#define IXJCTL_RING_START		_IO  ('q', 0x86)
+#define IXJCTL_RING_STOP		_IO  ('q', 0x87)
+#define IXJCTL_CARDTYPE			_IOR ('q', 0x88, int)
+#define IXJCTL_DSP_TYPE                 _IOR ('q', 0x8C, int)
+#define IXJCTL_DSP_VERSION              _IOR ('q', 0x8D, int)
+#define IXJCTL_DSP_IDLE			_IO  ('q', 0x8E)
+#define IXJCTL_TESTRAM			_IO  ('q', 0x8F)
+
+/******************************************************************************
+*
+* This group of IOCTLs deal with the record settings of the DSP
+*
+* The IXJCTL_REC_DEPTH command sets the internal buffer depth of the DSP.
+* Setting a lower depth reduces latency, but increases the demand of the
+* application to service the driver without frame loss.  The DSP has 480
+* bytes of physical buffer memory for the record channel so the true
+* maximum limit is determined by how many frames will fit in the buffer.
+*
+* 1 uncompressed (480 byte) 16-bit linear frame.
+* 2 uncompressed (240 byte) 8-bit A-law/mu-law frames.
+* 15 TrueSpeech 8.5 frames.
+* 20 TrueSpeech 6.3,5.3,4.8 or 4.1 frames.
+*
+* The default in the driver is currently set to 2 frames.
+*
+* The IXJCTL_REC_VOLUME and IXJCTL_PLAY_VOLUME commands both use a Q8
+* number as a parameter, 0x100 scales the signal by 1.0, 0x200 scales the
+* signal by 2.0, 0x80 scales the signal by 0.5.  No protection is given
+* against over-scaling, if the multiplication factor times the input
+* signal exceeds 16 bits, overflow distortion will occur.  The default
+* setting is 0x100 (1.0).
+*
+* The IXJCTL_REC_LEVEL returns the average signal level (not r.m.s.) on
+* the most recently recorded frame as a 16 bit value.
+******************************************************************************/
+
+#define IXJCTL_REC_CODEC                _IOW ('q', 0x90, int)
+#define IXJCTL_REC_START                _IO  ('q', 0x92)
+#define IXJCTL_REC_STOP                 _IO  ('q', 0x93)
+#define IXJCTL_REC_DEPTH		_IOW ('q', 0x94, int)
+#define IXJCTL_FRAME			_IOW ('q', 0x95, int)
+#define IXJCTL_REC_VOLUME		_IOW ('q', 0x96, int)
+#define IXJCTL_REC_LEVEL		_IO  ('q', 0x97)
+
+typedef enum{
+f300_640 = 4, f300_500, f1100, f350, f400, f480, f440, f620, f20_50,
+f133_200, f300, f300_420, f330, f300_425, f330_440, f340, f350_400,
+f350_440, f350_450, f360, f380_420, f392, f400_425, f400_440, f400_450,
+f420, f425, f425_450, f425_475, f435, f440_450, f440_480, f445, f450,
+f452, f475, f480_620, f494, f500, f520, f523, f525, f540_660, f587,
+f590, f600, f660, f700, f740, f750, f750_1450, f770, f800, f816, f850,
+f857_1645, f900, f900_1300, f935_1215, f941_1477, f942, f950, f950_1400,
+f975, f1000, f1020, f1050, f1100_1750, f1140, f1200, f1209, f1330, f1336,
+lf1366, f1380, f1400, f1477, f1600, f1633_1638, f1800, f1860
+}IXJ_FILTER_FREQ;
+
+typedef struct
+{
+  unsigned int filter;
+  IXJ_FILTER_FREQ freq;
+  char enable;
+}IXJ_FILTER;
+
+#define IXJCTL_SET_FILTER		_IOW ('q', 0x98, IXJ_FILTER *)
+#define IXJCTL_GET_FILTER_HIST		_IOW ('q', 0x9B, int)
+/******************************************************************************
+*
+* This IOCTL allows you to reassign values in the tone index table.  The
+* tone table has 32 entries (0 - 31), but the driver only allows entries
+* 13 - 27 to be modified, entry 0 is reserved for silence and 1 - 12 are
+* the standard DTMF digits and 28 - 31 are the DTMF tones for A, B, C & D.
+* The positions used internally for Call Progress Tones are as follows:
+*    Dial Tone   - 25
+*    Ring Back   - 26
+*    Busy Signal - 27
+*
+* The freq values are calculated as:
+* freq = cos(2 * PI * frequency / 8000)
+*
+* The most commonly needed values are already calculated and listed in the
+* enum IXJ_TONE_FREQ.  Each tone index can have two frequencies with
+* different gains, if you are only using a single frequency set the unused
+* one to 0.
+*
+* The gain values range from 0 to 15 indicating +6dB to -24dB in 2dB
+* increments.
+*
+******************************************************************************/
+
+typedef enum
+{
+hz20 = 0x7ffa, 
+hz50 = 0x7fe5, 
+hz133 = 0x7f4c, 
+hz200 = 0x7e6b, 
+hz261 = 0x7d50, /* .63 C1  */
+hz277 = 0x7cfa, /* .18 CS1 */
+hz293 = 0x7c9f, /* .66 D1  */
+hz300 = 0x7c75, 
+hz311 = 0x7c32, /* .13 DS1 */
+hz329 = 0x7bbf, /* .63 E1  */
+hz330 = 0x7bb8, 
+hz340 = 0x7b75, 
+hz349 = 0x7b37, /* .23 F1  */
+hz350 = 0x7b30, 
+hz360 = 0x7ae9, 
+hz369 = 0x7aa8, /* .99 FS1 */
+hz380 = 0x7a56, 
+hz392 = 0x79fa, /* .00 G1  */
+hz400 = 0x79bb, 
+hz415 = 0x7941, /* .30 GS1 */
+hz420 = 0x7918, 
+hz425 = 0x78ee, 
+hz435 = 0x7899, 
+hz440 = 0x786d, /* .00 A1  */
+hz445 = 0x7842, 
+hz450 = 0x7815, 
+hz452 = 0x7803, 
+hz466 = 0x7784, /* .16 AS1 */
+hz475 = 0x7731, 
+hz480 = 0x7701, 
+hz493 = 0x7685, /* .88 B1  */
+hz494 = 0x767b, 
+hz500 = 0x7640, 
+hz520 = 0x7578, 
+hz523 = 0x7559, /* .25 C2  */
+hz525 = 0x7544, 
+hz540 = 0x74a7, 
+hz554 = 0x7411, /* .37 CS2 */
+hz587 = 0x72a1, /* .33 D2  */
+hz590 = 0x727f, 
+hz600 = 0x720b, 
+hz620 = 0x711e, 
+hz622 = 0x7106, /* .25 DS2 */
+hz659 = 0x6f3b, /* .26 E2  */
+hz660 = 0x6f2e, 
+hz698 = 0x6d3d, /* .46 F2  */
+hz700 = 0x6d22, 
+hz739 = 0x6b09, /* .99 FS2 */
+hz740 = 0x6afa, 
+hz750 = 0x6a6c, 
+hz770 = 0x694b, 
+hz783 = 0x688b, /* .99 G2  */
+hz800 = 0x678d, 
+hz816 = 0x6698, 
+hz830 = 0x65bf, /* .61 GS2 */
+hz850 = 0x6484, 
+hz857 = 0x6414, 
+hz880 = 0x629f, /* .00 A2  */
+hz900 = 0x6154, 
+hz932 = 0x5f35, /* .33 AS2 */
+hz935 = 0x5f01, 
+hz941 = 0x5e9a, 
+hz942 = 0x5e88, 
+hz950 = 0x5dfd, 
+hz975 = 0x5c44, 
+hz1000 = 0x5a81, 
+hz1020 = 0x5912, 
+hz1050 = 0x56e2, 
+hz1100 = 0x5320, 
+hz1140 = 0x5007, 
+hz1200 = 0x4b3b, 
+hz1209 = 0x4a80, 
+hz1215 = 0x4a02, 
+hz1250 = 0x471c, 
+hz1300 = 0x42e0, 
+hz1330 = 0x4049, 
+hz1336 = 0x3fc4, 
+hz1366 = 0x3d22, 
+hz1380 = 0x3be4, 
+hz1400 = 0x3a1b, 
+hz1450 = 0x3596, 
+hz1477 = 0x331c, 
+hz1500 = 0x30fb, 
+hz1600 = 0x278d, 
+hz1633 = 0x2462, 
+hz1638 = 0x23e7, 
+hz1645 = 0x233a, 
+hz1750 = 0x18f8, 
+hz1800 = 0x1405, 
+hz1860 = 0xe0b, 
+hz2100 = 0xf5f6, 
+hz2450 = 0xd3b3
+}IXJ_FREQ;
+
+typedef enum
+{
+C1  = hz261,
+CS1 = hz277,
+D1  = hz293,
+DS1 = hz311,
+E1  = hz329,
+F1  = hz349,
+FS1 = hz369,
+G1  = hz392,
+GS1 = hz415,
+A1  = hz440,
+AS1 = hz466,
+B1  = hz493,
+C2  = hz523,
+CS2 = hz554,
+D2  = hz587,
+DS2 = hz622,
+E2  = hz659,
+F2  = hz698,
+FS2 = hz739,
+G2  = hz783,
+GS2 = hz830,
+A2  = hz880,
+AS2 = hz932,
+}IXJ_NOTE;
+
+typedef struct
+{
+  int tone_index;
+  int freq0;
+  int gain0;
+  int freq1;
+  int gain1;
+}IXJ_TONE;
+
+#define IXJCTL_INIT_TONE		_IOW ('q', 0x99, IXJ_TONE *)
+
+/******************************************************************************
+*
+* The IXJCTL_TONE_CADENCE ioctl defines tone sequences used for various
+* Call Progress Tones (CPT).  This is accomplished by setting up an array of
+* IXJ_CADENCE_ELEMENT structures that sequentially define the states of
+* the tone sequence.  The tone_on_time and tone_off time are in
+* 250 microsecond intervals.  A pointer to this array is passed to the
+* driver as the ce element of an IXJ_CADENCE structure.  The elements_used
+* must be set to the number of IXJ_CADENCE_ELEMENTS in the array.  The
+* termination variable defines what to do at the end of a cadence, the
+* options are to play the cadence once and stop, to repeat the last
+* element of the cadence indefinatly, or to repeat the entire cadence
+* indefinatly.  The ce variable is a pointer to the array of IXJ_TONE
+* structures.  If the freq0 variable is non-zero, the tone table contents
+* for the tone_index are updated to the frequencies and gains defined.  It
+* should be noted that DTMF tones cannot be reassigned, so if DTMF tone
+* table indexs are used in a cadence the frequency and gain variables will
+* be ignored.
+*
+* If the array elements contain frequency parameters the driver will
+* initialize the needed tone table elements and begin playing the tone,
+* there is no preset limit on the number of elements in the cadence.  If
+* there is more than one frequency used in the cadence, sequential elements
+* of different frequencies MUST use different tone table indexes.  Only one
+* cadence can be played at a time.  It is possible to build complex
+* cadences with multiple frequencies using 2 tone table indexes by
+* alternating between them.
+*
+******************************************************************************/
+
+typedef struct
+{
+  int index;
+  int tone_on_time;
+  int tone_off_time;
+  int freq0;
+  int gain0;
+  int freq1;
+  int gain1;
+}IXJ_CADENCE_ELEMENT;
+
+typedef enum
+{
+  PLAY_ONCE,
+  REPEAT_LAST_ELEMENT,
+  REPEAT_ALL
+}IXJ_CADENCE_TERM;
+
+typedef struct
+{
+  int elements_used;
+  IXJ_CADENCE_TERM termination;
+  IXJ_CADENCE_ELEMENT *ce;
+}IXJ_CADENCE;
+
+#define IXJCTL_TONE_CADENCE			_IOW ('q', 0x9A, IXJ_CADENCE *)
+/******************************************************************************
+*
+* This group of IOCTLs deal with the playback settings of the DSP
+*
+******************************************************************************/
+
+#define IXJCTL_PLAY_CODEC               _IOW ('q', 0xA0, int)
+#define IXJCTL_PLAY_START               _IO  ('q', 0xA2)
+#define IXJCTL_PLAY_STOP                _IO  ('q', 0xA3)
+#define IXJCTL_PLAY_DEPTH		_IOW ('q', 0xA4, int)
+#define IXJCTL_PLAY_VOLUME		_IOW ('q', 0xA5, int)
+#define IXJCTL_PLAY_LEVEL		_IO  ('q', 0xA6)
+
+/******************************************************************************
+*
+* This group of IOCTLs deal with the Acoustic Echo Cancellation settings
+* of the DSP
+*
+* Issueing the IXJCTL_AEC_START command with a value of AEC_OFF has the
+* same effect as IXJCTL_AEC_STOP.  This is to simplify slider bar
+* controls.
+******************************************************************************/
+#define IXJCTL_AEC_START		_IOW ('q', 0xB0, int)
+#define IXJCTL_AEC_STOP			_IO  ('q', 0xB1)
+
+#define AEC_OFF   0
+#define AEC_LOW   1
+#define AEC_MED   2
+#define AEC_HIGH  3
+/******************************************************************************
+*
+* Call Progress Tones, DTMF, etc.
+* Tone on and off times are in 250 microsecond intervals so
+* ioctl(ixj1, IXJCTL_SET_TONE_ON_TIME, 360);
+* will set the tone on time of board ixj1 to 360 * 250us = 90ms
+* the default values of tone on and off times is 840 or 210ms
+******************************************************************************/
+
+#define IXJCTL_DTMF_READY		_IOR ('q', 0xC0, int)
+#define IXJCTL_GET_DTMF                 _IOR ('q', 0xC1, int)
+#define IXJCTL_GET_DTMF_ASCII           _IOR ('q', 0xC2, int)
+#define IXJCTL_EXCEPTION		_IOR ('q', 0xC4, int)
+#define IXJCTL_PLAY_TONE		_IOW ('q', 0xC6, char)
+#define IXJCTL_SET_TONE_ON_TIME		_IOW ('q', 0xC7, int)
+#define IXJCTL_SET_TONE_OFF_TIME	_IOW ('q', 0xC8, int)
+#define IXJCTL_GET_TONE_ON_TIME		_IO  ('q', 0xC9)
+#define IXJCTL_GET_TONE_OFF_TIME	_IO  ('q', 0xCA)
+#define IXJCTL_GET_TONE_STATE		_IO  ('q', 0xCB)
+#define IXJCTL_BUSY			_IO  ('q', 0xCC)
+#define IXJCTL_RINGBACK			_IO  ('q', 0xCD)
+#define IXJCTL_DIALTONE			_IO  ('q', 0xCE)
+
+// This IOCTL replaced both IXJCTL_BUSY_STOP and IXJCTL_RINGBACK_STOP and
+// should be used from now on to stop all Call Progress Tones.  It will
+// actually abort any tone, regardless of time left in the tone_on_time
+// and tone_off_time counters.
+#define IXJCTL_CPT_STOP			_IO  ('q', 0xCF)
+
+/******************************************************************************
+* LineJack specific IOCTLs
+*
+* The lsb 4 bits of the LED argument represent the state of each of the 4
+* LED's on the LineJack
+******************************************************************************/
+
+#define IXJCTL_SET_LED			_IOW ('q', 0xD0, int)
+#define IXJCTL_MIXER			_IOW ('q', 0xD1, int)
+
+/******************************************************************************
+* 
+* The master volume controls use attenuation with 32 levels from 0 to -62dB
+* with steps of 2dB each, the defines should be OR'ed together then sent
+* as the parameter to the mixer command to change the mixer settings.
+* 
+******************************************************************************/
+#define MIXER_MASTER_L		0x0100
+#define MIXER_MASTER_R		0x0200
+#define ATT00DB			0x00
+#define ATT02DB			0x01
+#define ATT04DB			0x02
+#define ATT06DB			0x03
+#define ATT08DB			0x04
+#define ATT10DB			0x05
+#define ATT12DB			0x06
+#define ATT14DB			0x07
+#define ATT16DB			0x08
+#define ATT18DB			0x09
+#define ATT20DB			0x0A
+#define ATT22DB			0x0B
+#define ATT24DB			0x0C
+#define ATT26DB			0x0D
+#define ATT28DB			0x0E
+#define ATT30DB			0x0F
+#define ATT32DB			0x10
+#define ATT34DB			0x11
+#define ATT36DB			0x12
+#define ATT38DB			0x13
+#define ATT40DB			0x14
+#define ATT42DB			0x15
+#define ATT44DB			0x16
+#define ATT46DB			0x17
+#define ATT48DB			0x18
+#define ATT50DB			0x19
+#define ATT52DB			0x1A
+#define ATT54DB			0x1B
+#define ATT56DB			0x1C
+#define ATT58DB			0x1D
+#define ATT60DB			0x1E
+#define ATT62DB			0x1F
+#define MASTER_MUTE		0x80
+
+/******************************************************************************
+* 
+* The input volume controls use gain with 32 levels from +12dB to -50dB
+* with steps of 2dB each, the defines should be OR'ed together then sent
+* as the parameter to the mixer command to change the mixer settings.
+* 
+******************************************************************************/
+#define MIXER_PORT_CD_L		0x0600
+#define MIXER_PORT_CD_R		0x0700
+#define MIXER_PORT_LINE_IN_L	0x0800
+#define MIXER_PORT_LINE_IN_R	0x0900
+#define MIXER_PORT_POTS_REC	0x0C00
+#define MIXER_PORT_MIC		0x0E00
+
+#define GAIN12DB		0x00
+#define GAIN10DB		0x01
+#define GAIN08DB		0x02
+#define GAIN06DB		0x03
+#define GAIN04DB		0x04
+#define GAIN02DB		0x05
+#define GAIN00DB		0x06
+#define GAIN_02DB		0x07
+#define GAIN_04DB		0x08
+#define GAIN_06DB		0x09
+#define GAIN_08DB		0x0A
+#define GAIN_10DB		0x0B
+#define GAIN_12DB		0x0C
+#define GAIN_14DB		0x0D
+#define GAIN_16DB		0x0E
+#define GAIN_18DB		0x0F
+#define GAIN_20DB		0x10
+#define GAIN_22DB		0x11
+#define GAIN_24DB		0x12
+#define GAIN_26DB		0x13
+#define GAIN_28DB		0x14
+#define GAIN_30DB		0x15
+#define GAIN_32DB		0x16
+#define GAIN_34DB		0x17
+#define GAIN_36DB		0x18
+#define GAIN_38DB		0x19
+#define GAIN_40DB		0x1A
+#define GAIN_42DB		0x1B
+#define GAIN_44DB		0x1C
+#define GAIN_46DB		0x1D
+#define GAIN_48DB		0x1E
+#define GAIN_50DB		0x1F
+#define INPUT_MUTE		0x80
+
+/******************************************************************************
+* 
+* The POTS volume control use attenuation with 8 levels from 0dB to -28dB
+* with steps of 4dB each, the defines should be OR'ed together then sent
+* as the parameter to the mixer command to change the mixer settings.
+* 
+******************************************************************************/
+#define MIXER_PORT_POTS_PLAY	0x0F00
+
+#define POTS_ATT_00DB		0x00
+#define POTS_ATT_04DB		0x01
+#define POTS_ATT_08DB		0x02
+#define POTS_ATT_12DB		0x03
+#define POTS_ATT_16DB		0x04
+#define POTS_ATT_20DB		0x05
+#define POTS_ATT_24DB		0x06
+#define POTS_ATT_28DB		0x07
+#define POTS_MUTE		0x80
+
+/******************************************************************************
+* 
+* The DAA controls the interface to the PSTN port.  The driver loads the
+* US coefficients by default, so if you live in a different country you
+* need to load the set for your countries phone system.
+* 
+******************************************************************************/
+#define IXJCTL_DAA_COEFF_SET		_IOW ('q', 0xD2, int)
+
+#define DAA_US 		1  //PITA 8kHz
+#define DAA_UK 		2  //ISAR34 8kHz
+#define DAA_FRANCE 	3  //
+#define DAA_GERMANY	4
+#define DAA_AUSTRALIA	5
+#define DAA_JAPAN	6
+
+/******************************************************************************
+* 
+* Use IXJCTL_PORT to set or query the port the card is set to.  If the
+* argument is set to PORT_QUERY, the return value of the ioctl will
+* indicate which port is currently in use, otherwise it will change the
+* port.
+* 
+******************************************************************************/
+#define IXJCTL_PORT			_IOW ('q', 0xD3, int)
+
+#define PORT_QUERY	0
+#define PORT_POTS	1
+#define PORT_PSTN	2
+#define PORT_SPEAKER	3
+#define PORT_HANDSET	4
+
+#define IXJCTL_PSTN_SET_STATE		_IOW ('q', 0xD4, int)
+#define IXJCTL_PSTN_GET_STATE		_IO  ('q', 0xD5)
+
+#define PSTN_ON_HOOK	0
+#define PSTN_RINGING	1
+#define PSTN_OFF_HOOK	2
+#define PSTN_PULSE_DIAL	3
+
+/******************************************************************************
+* 
+* The DAA Analog GAIN sets 2 parameters at one time, the recieve gain (AGRR), 
+* and the transmit gain (AGX).  OR together the components and pass them
+* as the parameter to IXJCTL_DAA_AGAIN.  The default setting is both at 0dB.
+* 
+******************************************************************************/
+#define IXJCTL_DAA_AGAIN		_IOW ('q', 0xD6, int)
+
+#define AGRR00DB	0x00  // Analog gain in recieve direction 0dB
+#define AGRR3_5DB	0x10  // Analog gain in recieve direction 3.5dB
+#define AGRR06DB	0x30  // Analog gain in recieve direction 6dB
+
+#define AGX00DB		0x00  // Analog gain in transmit direction 0dB
+#define AGX_6DB		0x04  // Analog gain in transmit direction -6dB
+#define AGX3_5DB	0x08  // Analog gain in transmit direction 3.5dB
+#define AGX_2_5B	0x0C  // Analog gain in transmit direction -2.5dB
+
+#define IXJCTL_PSTN_LINETEST		_IO  ('q', 0xD7)
+
+typedef struct
+{
+  char month[3];
+  char day[3];
+  char hour[3];
+  char min[3];
+  int numlen;
+  char number[11];
+  int namelen;
+  char name[80];
+}IXJ_CID;
+
+#define IXJCTL_CID			_IOR ('q', 0xD8, IXJ_CID *)
+/******************************************************************************
+* 
+* The wink duration is tunable with this ioctl.  The default wink duration  
+* is 320ms.  You do not need to use this ioctl if you do not require a
+* different wink duration.
+* 
+******************************************************************************/
+#define IXJCTL_WINK_DURATION		_IOW ('q', 0xD9, int)
+
+/******************************************************************************
+* 
+* This ioctl will connect the POTS port to the PSTN port on the LineJACK
+* In order for this to work properly the port selection should be set to
+* the PSTN port with IXJCTL_PORT prior to calling this ioctl.  This will
+* enable conference calls between PSTN callers and network callers.
+* Passing a 1 to this ioctl enables the POTS<->PSTN connection while
+* passing a 0 turns it back off.
+* 
+******************************************************************************/
+#define IXJCTL_POTS_PSTN		_IOW ('q', 0xDA, int)
+
+/******************************************************************************
+*
+* IOCTLs added by request.
+*
+* IXJCTL_HZ sets the value your Linux kernel uses for HZ as defined in
+*           /usr/include/asm/param.h, this determines the fundamental
+*           frequency of the clock ticks on your Linux system.  The kernel
+*           must be rebuilt if you change this value, also all modules you
+*           use (except this one) must be recompiled.  The default value
+*           is 100, and you only need to use this IOCTL if you use some
+*           other value.
+*
+*
+* IXJCTL_RATE sets the number of times per second that the driver polls
+*             the DSP.  This value cannot be larger than HZ.  By
+*             increasing both of these values, you may be able to reduce
+*             latency because the max hang time that can exist between the
+*             driver and the DSP will be reduced.
+*
+******************************************************************************/
+
+#define IXJCTL_HZ                       _IOW ('q', 0xE0, int)
+#define IXJCTL_RATE                     _IOW ('q', 0xE1, int)
+#define IXJCTL_FRAMES_READ		_IOR ('q', 0xE2, unsigned long)
+#define IXJCTL_FRAMES_WRITTEN		_IOR ('q', 0xE3, unsigned long)
+#define IXJCTL_READ_WAIT		_IOR ('q', 0xE4, unsigned long)
+#define IXJCTL_WRITE_WAIT		_IOR ('q', 0xE5, unsigned long)
+#define IXJCTL_DRYBUFFER_READ		_IOR ('q', 0xE6, unsigned long)
+#define IXJCTL_DRYBUFFER_CLEAR		_IO  ('q', 0xE7)
+
+/******************************************************************************
+*
+* The defined CODECs that can be used with the IXJCTL_REC_CODEC and
+* IXJ_PLAY_CODEC IOCTLs.
+*
+* PCM uLaw mode is a "pass through" mode.
+*
+* 16 bit linear data is signed integer (2's complement form), positive
+* full scale is 7FFFH, negative full scale is 8000H, zero is 0000H
+*
+* 8 bit linear data is signed byte (2's complement form), positive
+* full scale is 7FH, negative full scale is 80H, zero is 00H
+*
+* 8 bit linear WSS data is unsigned byte, positive full scale is FFH,
+* negative full scale is 00H, zero is 80H.  This is the format used for
+* 8-bit WAVE format data (Windows Sound System).  Data can be converted
+* between the two 8-bit formats by simply inverting the ms bit. 
+*
+* G729 currently works most reliably with 10ms frames.  Use 20ms and 30ms
+* at your own risk.  If you really need larger frame sizes you can
+* concatenate multiple 10ms frames.
+*
+******************************************************************************/
+typedef enum{		// Bytes per 30ms audio frame
+G723_63	=	1,	// 24
+G723_53	=	2, 	// 20
+TS85	=	3,	// 32 Does not currently work on LineJack
+TS48	=	4,	// 18
+TS41	=	5,	// 16
+G728	=	6,	// 96 LineJack only!
+G729	=	7,	// 30 LineJack only!
+ULAW	=	8,	// 240
+ALAW	=	9,	// 240 not implemented DO NOT USE!
+LINEAR16=	10,	// 480
+LINEAR8	=	11,	// 240
+WSS	=	12	// 240
+}IXJ_CODEC;
+/******************************************************************************
+*
+* The intercom IOCTL's short the output from one card to the input of the
+* other and vice versa (actually done in the DSP read function).  It is only
+* necessary to execute the IOCTL on one card, but it is necessary to have
+* both devices open to be able to detect hook switch changes.  The record
+* codec and rate of each card must match the playback codec and rate of
+* the other card for this to work properly.
+*
+******************************************************************************/
+
+#define IXJCTL_INTERCOM_START 		_IOW ('q', 0xFD, int)
+#define IXJCTL_INTERCOM_STOP  		_IOW ('q', 0xFE, int) 
+
+/******************************************************************************
+*
+* This IOCTL will decrement the module usage counter so you can force
+* the module to unload after a program bombs.
+*
+******************************************************************************/
+
+#define IXJCTL_MODRESET		        _IO  ('q', 0xFF)
+
+/******************************************************************************
+*
+* Various Defines used for the Quicknet Cards
+*
+******************************************************************************/
+
+#define SYNC_MODE_CODEC         0
+#define SYNC_MODE_DATA          1
+#define SYNC_MODE_POLL          2
+#define SYNC_MODE_HOST          3
+
+#define RECORD_SYNC_MODE        0x5100
+#define PLAYBACK_SYNC_MODE      0x5200
+
+#define USA_RING_CADENCE	0xC0C0
+
+/******************************************************************************
+*
+* The exception structure allows us to multiplex multiple events onto the
+* select() exception set.  If any of these flags are set select() will
+* return with a positive indication on the exception set.  The dtmf_ready
+* bit indicates if there is data waiting in the DTMF buffer.  The
+* hookstate bit is set if there is a change in hookstate status, it does not
+* indicate the current state of the hookswitch.  The pstn_ring bit
+* indicates that the DAA on a LineJACK card has detected ring voltage on
+* the PSTN port.  The caller_id bit indicates that caller_id data has been
+* recieved and is available.  The pstn_wink bit indicates that the DAA on
+* the LineJACK has recieved a wink from the telco switch.  The f0, f1, f2
+* and f3 bits indicate that the filter has been triggered by detecting the
+* frequency programmed into that filter.
+*
+******************************************************************************/
+
+typedef struct
+{
+  unsigned int dtmf_ready:1;
+  unsigned int hookstate:1;
+  unsigned int pstn_ring:1;
+  unsigned int caller_id:1;
+  unsigned int pstn_wink:1;
+  unsigned int f0:1;
+  unsigned int f1:1;
+  unsigned int f2:1;
+  unsigned int f3:1;
+  unsigned int reserved:23;
+}IXJ_EXCEPT;
+
+typedef union
+{
+  IXJ_EXCEPT bits;
+  unsigned int bytes;
+}IXJ_EXCEPTION;
+