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README, UPGRADE.txt, system.conf.sample: Add documentation for using HWEC

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Update documentation to the effect that HWEC is not enabled by default
and must be enabled manually if desired via "echocanceller" in system.conf.


git-svn-id: http://svn.astersk.org/svn/dahdi/tools/trunk@9528 17933a7a-c749-41c5-a318-cba88f637d49
This commit is contained in:
Kinsey Moore 2010-12-09 22:44:52 +00:00
parent d3d246b656
commit 249baf1db3
3 changed files with 10 additions and 8 deletions
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4
README
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@ -106,7 +106,9 @@ channels, and send it to the kernel.
A sample annotated system.conf is included in this directory and
installed by default. Edit it to suit your configuration. Alternatively
use the script dahdi_genconf to generate one that should work with your
system.
system. Note that while dahdi_genconf will generate a working configuration,
it will not automatically detect hardware echo cancellation modules. These
will have to be enabled manually in system.conf.
/etc/dahdi/init.conf
~~~~~~~~~~~~~~~~~~~~

7
UPGRADE.txt
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@ -62,10 +62,9 @@ Any or all of these modules can be loaded at the same time, and the echo
canceler to be used on the system's channels can be configured using
the dahdi_cfg tool from the dahdi-tools package.
IMPORTANT: It is *mandatory* to configure an echo canceler for the
system's channels using dahdi_cfg unless the interface cards in use
have echo canceler modules available and enabled. There is *no*
default software echo canceler with DAHDI. See
IMPORTANT: It is *mandatory* to configure an echo canceler for the system's
channels using dahdi_cfg. There is *no* default echo canceler with DAHDI, not
even hardware echo cancellation modules. See
<<_echo_cancellers,section on echo cancellers>> in sample system.conf.

7
system.conf.sample
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@ -312,10 +312,11 @@ defaultzone=us
# cancellers are compiled and installed as part of the dahdi-linux package.
# You can specify in this file the echo canceller to be used for each
# channel. The default behavior is for there to be NO echo canceller on any
# channel, so it is very important that you specify one here if you do
# not have hardware echo cancellers and need echo cancellation.
# channel, so it is very important that you specify one here.
#
# Valid echo cancellers are: mg2, kb1, sec2, and sec.
# Valid echo cancellers are: hwec, mg2, kb1, sec2, and sec.
# 'hwec' is a special echo canceller that should be used if hardware echo
# cancellation is desired on and available on the specified channels.
# If compiled, 'hpec' is also a valid echo canceller.
#
# To configure the default echo cancellers, use the format: