Re: [hylafax-users] Hylafax ISDN cards- active vs passive

[Pedro Rocadas <procadas@xxxxxxxxx>]

Thanks! :-)

--- Holger Raschke <holger.raschke@xxxxxxxxxxxxxx>
wrote:
> Hi Pedro,
> 
>  > Hi Holger. Sorry asking you and not in the list
> but I
>  > needed an answer for this, because my budget is
> 
> sorry for not answering your question on the list.
> I'm a bit busy at the 
> moment.
> 
>  > limited and I must provide a complete report to
> the
>  > administration before buying the card. Wich is
> the
>  > difference between the active and passive cards?
> I
> 
> just a few hints:
> 
> passive cards:
> - only one card per box is supported by the linux
> drivers
> - have only one ISDN-connector (1x S0 or 2x
> B-channels)
> - don't support some PBX-protocols
> - let the CPU do all the communication
> 
> active cards:
> - up to four per box are possible (mixing B1/C2/C4
> is possible)
> - have 1 (B1) to 4 (C4) ISDN-connectors (one
> connector = 2 B-channels)
> - support point-to-point and point-to-multipoint
> protocols
> - have own CPU/memory to increase the CPU-idle time
> ;-)
> 
> You can find a comparison of the active AVM-cards on
> this page:
>
http://www.avm.de/en/Produkte/aktive_Controller/C4/Datenvergleich.php
> 
> Basic ISDN-infos are here:
> http://www.avm.de/en/infoguide/isdn/index.php
> 
>  > don't needed a T1 line (yet :-) ), just a few
> numbers
>  > to a maxiimun of 30 to make tests. Thanks in
> advance
>  > for any hint.
> 
> Be careful. The AVM-T1-hardware does not support
> CAPI cased fax!
> 
> I didn't get if you are behind a PBX or not.
> ISDN/CAPI supports as much 
> numbers per channel as you configure in the
> config-section.
> The number of B-channels you need depends on the
> need of parallel 
> receiving. A common rule is to share one line with
> 20-25 users.
> 
> In any case i would prefer an active card, as you
> can expand the box 
> with more cards if you have to increase the
> line-capacity.
> 
> We use two server (backup!) with one C4 each, behind
> a PBX. But we don't 
> receive more than approx. 40-50 pages a day at the
> moment. The system is 
> designed to fulfil the needs of 400 users.
> 
> -- 
> Holger
> 
> 
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