[Freeswitch-users] Commercial Fax over T.30 for FreeSWITCH

[Anthony Minessale]

Once you get to a version of FS that supports timerfd there is less
issue with kernel freq.

Also, more people should try the new t30 modem emulation built right
into FS to work with hlyafax

see spandsp.conf.xml
one word of caution is don't leave (FS off and the faxgettys on) very
long or the system will start using the ttty's for ssh sessions etc
and faxgetty will start sending at commands to your stdin.



    <modem-settings>
<!--
total-modems set to N will create that many soft-modems.
    If you use them with Hylafax you need the following for each one
numbered 0..N:
    1) A line like this in /etc/inittab:
      f0:2345:respawn:/usr/lib/fax/faxgetty /dev/FS0

    2) copy conf/config.FS0 to /var/spool/hylafax/etc (or wherver the
appropriate dir is on your system)

    Subsequent modem configs would incrment the 0 to 1 and so on.

-->
      <param name="total-modems" value="0"/>




On Thu, May 3, 2012 at 10:19 AM, Paul Cupis <paul at cupis.co.uk> wrote:
> On Thu, May 03, 2012 at 05:53:01PM +0530, Anita Hall wrote:
>>    No, I am running FreeSWITCH on an Ubuntu 64-bit Quad core machine.
>>    There is no VM.
>
>>    What all things should I check to ensure that the timing on my system
>>    is good? Like, may be, my motherboard is bad or my kernel could be
>>    tuned better ?
>
> The most common suggestion is to use a kernel with 1000Hz timer. I think
> that the default timer for Ubuntu is 250, so this would be first thing
> to check/change.
>
> You can check by running:
>
>     grep CONFIG_HZ= /boot/config-`uname -r`
>
> and if it is not 1000, it would be worth installing a 1000Hz kernel
> and re-testing.
>
> Ubuntu may have a packages -lowlatency kernel which has a 1000Hz timer
> but this will also have other changes. I think a lot of people will
> compile a custom kernel based on the standard Ubuntu one, just changing
> that one configuration option.
>
> Regards,
>
>
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-- 
Anthony Minessale II

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