[OpenWrt-Devel] lantiq DSL drivers / firmware info

Aleksander Wałęski olewales at gmail.com
Mon May 25 03:39:41 EDT 2015

On Mon, May 25, 2015 at 8:52 AM, Sylwester Petela <sscapi at gmail.com> wrote:
> Getting rid of init script isn't good probably, as original driver in UGW
> passes the same commands (mostly) to dsl_control.

I _suspect_ that new firmware is detecting line parameters
automatically. If this is true then keeping such "magic" values in
configuration might actually decrease compatibility for some users (if
driver is somehow using them anyway). This needs testing.

> Firmware dir is also in original UGW init script, moving it from config to
> init doesn't make any difference.

This isn't crucial. I was just wondering if /etc/network/config is the
most logical place for it.

> What You have missed is that driver needs to be universal, vrx supports ADSL
> as well, annex a/b lines, it can be tuned to have better performance but not
> without getting rid of its "universality".

That's why I think we should stick to TP-LINK firmware as default.
it's not customized for any ISP in particular.
As for tunning: For now it does not seem that we can adjust any
parameters that would noticeably improve performance on one ISP while
breaking support for another. (SNR margin adjustment comes to mind,
but it's ISP-agnostic). Presence of some features improve xDSL
performance but it all happens in firmware anyway, which we get as
binary blob and can do nothing with it. Everything that can be done is
probably there by default or is enforced by DSLAM.
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