Re: [hylafax-users] capi4hylafax, external TA, ...

["Bernd Proissl" <lists@proissl.de>]

> Ok, so if I buy a cheap fritz I'll use
> (1) hylafax -> (2) capi4hylafax -> (3) capi4linux (avm specific) + (4) fritz
> 
> For other brands I need a specific (3), and I can use (2), right?
this is how I understand AVM. I haven't tested it myself with anything other that (3) (yet)

> Since avm provide this (3) for their cards I assume there's no standard for (3),
> so that every card needs one?
yes and no.

Let's say (3) has two sides: left and rigth
The left side which is seen from apps like (2) is CAPI2. CAPI2 is a (binary) standard
The right side is vendor specific and there is no standard.
Think of (3) as a driver for your specific hardware (like a printer driver under windows
which has a standardized interface to windows -so that windows can make use og it- and
a vendor specifc part to handle the hardware)

> >CAPI2 (under linux) is a binary standard so there should be no need to compile/link
> >(is this correct?)
> I see the package isdn4k-utils has a libcapi20.so, is this the standard you're
> talking about?

current isdn4k has some CAPI support/has some relation to CAPI but do not ask me for details.
(3) is all I ever used until know.

It is also possible to run isdn4k on one fritz and (3) on another in one machine.

> So, this libcapi20.so may be the missing (3)?

I do not know :-(

> >BUT: http://www.capi.org/cgi/hinfo.pl?nr=429 does not have a check at T.30 (Fax)
> >so there is a CAPI2 driver but it does not support faxing :-(
> I see; I thought all this complicated capi20 thing was to have isdn stuff that
> does not something to do it.

CAPI as a principle is not complicated: CAPI is "just" a software interface.
The problem is that you do not know which software does offer a CAPI 2 interface
and not all services offered by CAPI2 spec need to be implemented from a certain
driver. And maybe the wording is confusing also.

Fax as a CAPI service for passive cards was not available under windows for some
time because of the computational power which is needed to simulate the analog signal
on a digital processor. Under Linux it took even longer to become availble.
In general you can use CAPI for much more than faxing.

> Looking at ZyXEL, LCD+M http://www.capi.org/cgi/hinfo.pl?nr=433 does fax, but it
> has a complete modem inside, so that I could use it with just AT fax commands.

The modem hardware is used for signal processing.

> It seems the cheaper is the internal FritzPCI, but usually we prefer to spend
> more for something external (something you can switch on/off withouth switching
> on/off the machine, but this is from the "analog modems time", maybe isdn ta's
> are more reliable)

There is a new Fritz!PC which is called V2 (Version 2). Make sure that 
your system/kernel can make use of it as it has (AFAIK) different hardware 
than the previous version.

Haven't yet needed to reset a system runnig with a Fritz for some months now
(send only)

Bernd



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