[Freeswitch-users] freetdm rxgain txgain

[Karl Schmidt]

On 08/16/2013 08:27 AM, Moises Silva wrote:

> freetdm.conf is mandatory, zt.conf is optional. The gain parameters specified in freetdm.conf are
> common to all board manufacturers, the gains are applied *after* reading from the driver and
> *before* writing to the driver, so if you changed the gains in freetdm.conf, is no surprise DAHDI
> debug logs did not indicate any gain change.

This is not from a normal log - this is bumping the kernel driver to dump it's current settings into 
/var/log/syslog

> The DAHDI drivers have their own kernel-level gain
> adjustment. You will have problems if you're tweaking gains at both the kernel level and the freetdm
> level (user space).

In other words, the zt.conf could override the freetdm.conf ?

I think this is due to overlapping documentation over the time of the evolution of the software.

I'm

>
> Post your freetdm.conf, freetdm.conf.xml, zt.conf, system.conf files using
> http://wiki.freeswitch.org/wiki/Reporting_Bugs#Using_The_Pastebin
>
> Note you can tweak the gain live during the call using the fs_cli command 'ftdm gains'

I also found there was yet another setup file that mattered:
/etc/modprobe.d/dahdi.conf

Looks like adding :
options wctdm24xxp Boostringer=1

Will bring the ring signal up to something that modern phone detect  (60Vrms) and you won't find 
this setting in the manual.

Haven't tested it yet.

I'm also writing this up ( 7 conf files involved so far ) at

http://wiki.xtronics.com/index.php/Freetdm



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Karl Schmidt                                  EMail Karl at xtronics.com
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