[asterisk-dev] List of Zaptel/Libpri 1.2->1.4 changes

[Matthew Fredrickson]

Here is a simple list of changes I noted going through commit logs for 
the zaptel/libpri 1.4 release.  This will become the CHANGES file 
respectively in each project for the 1.4 release.  If anybody has any 
additional things that I have missed in my huntings, please let me 
know.

New libpri features 1.2->1.4:
======================
RLT support (Two B-channel transfer) for DMS100.

Support for keypad facility IE

Add support for T309 (Alarm debounce on D-channel, so that it doesn't 
hang up all calls every time a short alarm occurs).


New Zaptel features:
================
Fxotune got a rewrite.  It not only tunes the hybrid, but also it tunes 
the onboard coefficients.  It works significantly better now, and it 
doesn't take nearly as long to tune the line.  So if you've run it 
already on your line, re-run it.  It should tune even better to the 
line now.

ZT_LOOPBACK ioctl added.  Used for cross connecting the received audio 
on a channel (from the line) to the transmit side.  Useful for doing 
single channel loopbacks like SS7 continuity tests.

The MG2 echo canceler is now the default echo canceler.  It has 
underwent some optimizations/improvement over the 1.2 version of MG2.

Support for doing HDLC on the hardware on cards that support it 
(TE2xxp/TE4xxp)

Support for Xorcom Astribank hardware.

Added a filter for removing DC from the signal before it hits the echo 
canceler.

Add support for unchannelized mode w/ TE110P.

Allow for up to 1024 echo taps to be used with the echo canceler 
selected.

Added timeslot interchange support on the TDM2400P card. (native 
bridging on the card).

Added support for new Octasic based echo canceler on the TE4XXP and 
TE2XXP cards.

Added support for radio modules on the TDM24XXP from Jim Dixon.

Added support for B410P driver installation.

Added support for new zaptel transcoding interface for the TC400P.

Added support for variable length DTMF.

Added support for 56kbps SS7 links using hardware HDLC mode.


---
Matthew Fredrickson