On Sat, Dec 15, 2001 at 04:50:12PM -0600, David Mackay wrote:
> Bananaskin wrote:
> 
> > I believe that pppoa3 can handle multiple modems..
> > 
> > man pppoa3
> 
> Yes, I saw that.  I was hoping for someone that had actually DONE it. 
> We have a school system locally that has two T1s serving 65+ sites, and 
> the T1s are at about 90% utilization during school hours.  Most of what 
> they're doing is web access, so the fact that the outgoing bandwidth 
> would be much lower than the downstream bandwidth wouldn't be a problem. 
>   If they could plug in four adsl lines, they could increase their 
> downstream bandwidth (potentially, I don't know how far they are from 
> the DSLAM), and cut their costs.  I know that you can use the -m flag to 
> specify the modem number, but I wonder about other gotchas.  Alex has 
> already mentioned that I'd need a powered hub.  What else could bite me?

We tryed to add the mutli modem support with the driver, but i don't
think i can work easily now with linux. It could work better with BSD.
There is a problem with the function that search the modem. It looks
only the first modem that match. So you couldn't init more than 1 modem.
That's why we added a function to modem_run and pppoax to specify
staticly the modem.
With bsd there is no problem as the modem has always the same name
(/dev/ugen0, 1 ..) but under Linux, as i know it's dynamic. So it could
work only if you find the modems then init and launch the connection on
each one, and you have to find them each time you reboot the computer.

Well, all that to say that right now it wouldn't be easy to use more
than 1 modem under linux (i don't see any problem under BSD). But if you
plan to do that, we can work together to change the search  function
(anyway we'll have to do it) and test it as we don't have multiple lines
and modems to do that.

That was the driver part. For the technical part, i don't know if you
can plug more than 1 modem on a usb hub. Maybe you would have to put
PCI/USB card and plug a modem on each one.
As i remember, i managed to put a webcam and the modem on same onboard
usb. (webcam also use about 500ma). Everthing must depend on the usb
chipset ... don't need to say that VIA chipsets don't have a good
reputation here.

-- 
Francois Rogler


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