Re: [hylafax-users] several ISDN questions

[Toni Mueller <support-hylafax@xxxxxxxx>]

Hi,

thanks for your answer!

On Sun, 17.08.2008 at 01:17:10 +0200, Bodo Meissner <bodo@xxxxxxxxx> wrote:
> Toni Mueller wrote, on 16.08.2008 12:06:
> | I dimly remember that, in olden times, the AVM B1 was apparently
> | considered the "holy grail" of ISDN faxing,
> You can use an AVM B1 with capi4hylafax or (probably) with asterisk and
> IAXmodem. I have used the first approach for some time and found
> problems when sending to ISDN fax systems I was not able to resolve.

Did you get near an analysis about what exactly failed? I recently
talked to someone (carrier techie) who told me that he had to change
some higher-order transport systems (ie, at the carrier interconnect
level) to allow certain fax functions to work properly.

> I did not try asterisk because I think it's too much work if I only want
> a working HylaFAX server.

I'm not sure about this reasoning, but for me, the problem might look
different anyway because:

 * Installing Asterisk (but not configuring it, yet) was a no-brainer
   in a Lenny (beta) machine. Unfortunately, having to grok and
   troubleshoot Asterisk might turn out much harder than it looks at
   first sight. I just don't know at this point.
 * I wouldn't mind having a case to try out Asterisk, and then
   hopefully expand its usage thereafter.
 * It may even be the most future-proof approach, unless the use of
   CAPI services directly will stay around, and be reasonably well
   supported, on all sides for some time to come.

> | or whether cards like the Eicon DIVA, or the
> | HFC cards, are better to use for such a task.
>
> I replaced my AVM B1 card with an Eicon (now Dialogic) Diva Server card
> using it's TTY interface configured as a Group 1.0 modem.

So, Group2 faxing is impossible under ISDN? Should I rather get a
multiport serial card and attach two modems to it?

> You need the Diva Server drivers for Linux from Dialogic for the TTY
> interface. Version 8.5-108-80 (from the official download pages) is
> compatible with Linux kernels up to 2.6.24 and version 8.5-108-106
> (maybe only available from Dialogic's support) with kernels up to 2.6.25.
> Kernel version 2.6.26 is not supported because of major changes in the
> modules handling.

Regardless of whatever else I'm going to do, I'm not taking a binary
driver, no matter what. I've learned this lesson the hard way years
ago. So, the Diva cards are out of bounds for me if I understood you
correctly.

This leaves me with the AVM, HFC, or modem approaches...


Kind regards,
--Toni++


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