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mgcp协议源代码。支持多种编码：g711

CHANGES FILE

This tarball is ixj-0.1.30.tgz and has the following changes included
since the previous release:

- the ixj.o driver has the following improvements:

  - Internet LineJACK POTS port support.  The LineJACK PSTN support
    is not implemented yet.  However, the LineJACK will now do
    everything that the PhoneJACK will do.

  - added the ability to set the buffer "depth" for reads and writes
    to the codecs.  The default depth of buffers is 2 frames, but this
    can be changed via the IXJCTL_REC_DEPTH ioctl.  From the ixjuser.h file:

* 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.

    Setting the depth to 1 frame significantly reduces the latency when
    using a compressed codec.

  - the DSP is properly shut down and idled upon a device close.  Previously,
    failure to idle the DSP would result in system lockups in some scenarios.

  - hook switch detection now works properly when tones are being played.


- the IXJ-HOWTO file has been updated to reflect the new way to load and
  unload the driver

- the FAQ file was overhauled and updated to add some of the key issues that
  have come up in recent weeks.