[Asterisk-Users] TDM04B vs Dell

[Michael Swan]

At 06:53 PM 1/5/2005 -0600, you wrote:
> > I've struggled for several days trying to get a Digium TDM04B 4-port
> > wxfco card working on a Dell 1U PowerEdge 750 machine running
> > Fedora Core 1. I finally got a call back from Digium who indicated that
> > there is a fundamental conflict between the card and the PowerEdge
> > having to do with PCI interrupts. Asterisk version is stable v1-0 12/29/04.
>
>That sounds a little hard to believe.

         I agree. Perhaps I have too much faith in Digium support. Does
         anyone else disagree with Digium's assessement?


> > The symptoms of the problem were as follows:
> >
> > 1. issue "modprobe zaptel" which immediately returns with no feedback
> >
> > 2. issue "modprobe wcfxo" which returns
> >       init_module: No such device
> >       Hint: isnmod errors can be caused by incorrect module parameters,
> > including invalid IO or IRQ parameters
> >
> > 3. issue "modprobe wcfxs" which immediately returns with no feedback, 
> however
> > the four lights on the card go on and then the machine locks up 
> completely,
> > requiring
> > a power cycle to get it running again. After the power cycle, if I look in
> > /var/log/messages
>
>If you have a tdm04b, that says you have four fxo ports. Why are you
>trying to load wcfxs?

         Actually, I tried "modprobe wctdm" which was supposed to load the
         correct TDM driver and this resulted in the same behavior described
         above (lights on, system locks.) In an attempt to figure out why the
         system locked up I subsequently issued a "modprobe wcfxs" to
         confirm that was causing the problem.


> > I see a long cycle of the following messages before reboot:
> >       kernel: Dazed and confused, but trying to continue
> >       kernel: Do you have a strnage power saving mode enabled?
> >       kernel: Uhhuh, NMI received for unknown reason 20 on CPU 0
> >
> > 4. if I cat /proc/interrupts, I don't see any entry for a wcfxo module.
> >
> > In any case, I did follow the setup instructions on the Digium site (make
> > install in /usr/src/zaptel, edit /etc/zaptel.conf, edit
> > /etc/asterisk/zapata.conf, etc.)
> > and we currently have a X100P wcfxo card in another machine running well
> > so we've already had experience getting a card working.
> >
> > If anyone has insight into what might be wrong, please do let me know.
> > Ultimately, if I trust the Digium support information, then this card will
> > never work, so I'd be grateful to hear about any other PCI card that 
> provides
> > four or so wcfxo interfaces that might work with the PowerEdge.
>
>I don't use Fedora, but it seems those that do have had problems
>loading the drivers. Try the modprobe wcfxo then zaptel, then check
>your /proc/interrupts. If that doesn't work, try modprobe zaptel only.
>I think someone mentioned a readme in the src/zaptel directory for
>Fedora as well. Might look.
>

         Thanks for the advice. However, "modprobe zaptel" didn't
         do anything (that I could tell) and "modprobe wcfxo" returned
         the error. And, greping for Fedora in src/zaptel didn't turn up any
         matches.

Michael Swan
Neon Software, Inc.