asterisk users - Nov 2007 - asterisk 1.4.10 on linux kernel 2.6 needs timing device for trunking

I understood that a timing device (ztdummy if no zaptel hardware is
present) was not necessary anymore with linux kernel 2.6.

When I enable iax2 trunking I get this warning
 chan_iax2.c:8908 build_user: Unable to support trunking on user
'xxxxxx'
without zaptel timing

The linux kernel is 2.6.22-14-386

Can I ignore this message, and is trunking working despite this warning?

The ztdummy module is not part of the zaptel ubuntu package, so it cannot
be loaded. I wanted to install from ubuntu packages for a change and not
compile it from source.

rgds,

Hans Feringa

Hans Feringa wrote:
> I understood that a timing device (ztdummy if no zaptel hardware is
> present) was not necessary anymore with linux kernel 2.6.
> 
> When I enable iax2 trunking I get this warning
>  chan_iax2.c:8908 build_user: Unable to support trunking on user
'xxxxxx'
> without zaptel timing
> 
> The linux kernel is 2.6.22-14-386
> 
> Can I ignore this message, and is trunking working despite this warning?
> 
> The ztdummy module is not part of the zaptel ubuntu package, so it cannot
> be loaded. I wanted to install from ubuntu packages for a change and not
> compile it from source.
You still need ztdummy.

On Tue, 2007-11-06 at 18:30 +0100, Hans Feringa wrote:
> I understood that a timing device (ztdummy if no zaptel hardware is
> present) was not necessary anymore with linux kernel 2.6.
Not quite... this is commonly misunderstood, so let me clarify.  Under
the 2.6 kernel, ztdummy gets it timing directly from the kernel, and not
from certain USB controllers like ztdummy does under the 2.4 kernel.


-- 
Jared Smith
Community Relations Manager
Digium, Inc.

On 11/6/07, Hans Feringa <linux at shelob.nl>
wrote:
> I understood that a timing device (ztdummy if no zaptel hardware is
> present) was not necessary anymore with linux kernel 2.6.
>
> When I enable iax2 trunking I get this warning
>  chan_iax2.c:8908 build_user: Unable to support trunking on user
'xxxxxx'
> without zaptel timing
>
> The linux kernel is 2.6.22-14-386
>
> Can I ignore this message, and is trunking working despite this warning?
>
> The ztdummy module is not part of the zaptel ubuntu package, so it cannot
> be loaded. I wanted to install from ubuntu packages for a change and not
> compile it from source.
>
> rgds,
>
I believe that's OpenPBX that tries to derive its timing without
Zaptel devices, however then you need to recompile your Kernel with
1000Hz timing as most use ~250Hz by default. Linux 2.6 + Ztdummy works
fine and I'll take that over having to recompile the Kernel any day.

That was my (mis)understanding as well. It seems that it is currently not
possible to compile the zaptel modules for a 2.6.22 linux kernel. For now
I will not use the trunking option.

Thanks,

Hans Feringa
> On Tue, 2007-11-06 at 18:30 +0100, Hans Feringa wrote:
>> I understood that a timing device (ztdummy if no zaptel hardware is
>> present) was not necessary anymore with linux kernel 2.6.
>
> Not quite... this is commonly misunderstood, so let me clarify.  Under
> the 2.6 kernel, ztdummy gets it timing directly from the kernel, and not
> from certain USB controllers like ztdummy does under the 2.4 kernel.
>
>
> --
> Jared Smith
> Community Relations Manager
> Digium, Inc.
>
>
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On Wed, Nov 07, 2007 at 07:59:55AM +0100, Hans Feringa
wrote:
> That was my (mis)understanding as well. It seems that it is currently not
> possible to compile the zaptel modules for a 2.6.22 linux kernel. For now
> I will not use the trunking option.
Zaptel sure can, if you use zaptel 1.4.6 / zaptel 1.2.21 .

-- 
               Tzafrir Cohen       
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