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

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

> I have a spare TA (it's an external ZyXEL OMNI NET D) and it says it support
> CAPI-1.1a, so I want to see whether it works with capi4hylafax.
>
> However, all docs I see for capi4hylafax talks about internal cards; isdn4linux
> docs say isdn4linux is not needed for external TAs.
> 
> Is there anyone with experience on isdn stuff who can clarify? 

yes, me :)

> Are external isdn
> TAs hopeless as regards to fax/HylaFAX?

short answer: no, not in general.

long answer:
capi4hylax needs a CAPI 2 implementation. It does not care whether an
internal card provides it or whether any piece of hardware provides it.
CAPI (2) is a standardized software interface for isdn equipment.

In the very first ISDN days when telcos run their own ISDN signaling protocols CAPI1 
was in wide use on intel/windows around here. With the transition from propietary 1-TR6 to 
standardized DSS1 signaling CAPI 1 needed rework and CAPI 2 was born. I havent heard
about CAPI1 for a long time now.

I looked at www.avm.de and the german FAQ about capi4hylafax says that it needs CAPI2.
(I wonder whether there is a standardized CAPI1 for linux? www.capi.org only shows CAPI2
docus now)

Try to find a CAPI 2 implementation for your hardware.

PS.: If ISDN is available for you then it is worth trying with cheap passive ISDN cards.

HTH

Bernd




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