[Asterisk-Users] FXOs

[Rich Adamson]

> >
> > Have ran both the x100p's and tdm04b (4-port fxo) for several months.
> > In the US, both are usable however the software drivers still are in
> > need of some serious help. Most of the issues revolve around:
> >  - interrupts, pci bus or something like that resulting in echo
> >    (which appears to be system/motherboard dependent), and echo
> >    cancellation functions that have only a limited range,
> >  - transmission levels (rxgain/txgain) are not anywhere near useful
> >    outside a rather limited range (without causing other problems)
> >  - less then stable causing failures that result in having to reboot
> >    the entire system (stopping and restarting * and the drivers do
> >    not always work).
> >  - callerid reliability runs about 80% of what a cheap analog phone
> >    bridged onto the pstn line displays.
> 
> I have a customer with a tdm04b and echo problems.  I have tried the
> suggestions in the wikki and everything I could come up with.  You say
> system and MB dependant, have you found a setup that does not introduce
> echo?  I am running on a Dell sc400.
> 
> Has anyone actully fixed this issue?  If so, how?

Nope, not yet for all three questions. Probably has something to do with
interrupt latency, pci controller, or motherboard chipset issues. See
previous post from a few minutes ago.

Rich