[Asterisk-Users] Which is the best fax-modem for testing ?

[Woodoo People .pGa!]

Keyboardot ragadtam, hogy va'laszoljak Rich Adamson osszedobalt bytejaira:"

I agree with most of the points, however i have installed several systems
with x100p and/or hfc based ISDN, and voip trunk. If they user don't forget
to use the configured prefix for using pstn for fax, everything is nice.
Even if we are using digium fxo/fxs ports, or using ATA (Linksys pap2 or 
Sipura) on FXS side. I'm not saying that is a 100% solution, but it works
for SOHO i think.
 
> >Which fax-modem would you pick if you had to test fax capabilities ?
> > 
> >For instance, before releasing a new PBX system offering fax 
> >connectivity, you would like to make sure you "comply" with most fax 
> >machines and protocols.
> >As you can't afford you buy and maintain tens of such fax machines nor 
> >can't afford to test by hand each protocol, it's tempting to buy an 
> >all-inclusive fax-modem and run a program instead.
> >Which one would you choose for that ?
> 
> The fax modem is not really the issue with asterisk. By far, the 
> majority of existing analog fax machines installed and being sold today 
> will function just fine with asterisk.
> 
> If you sell an asterisk system into an analog pstn environment, any fax 
> machine will function through asterisk "if" you use the Sangoma A200D 
> analog card with fxo and fxs modules. (Very stable and very reliable fax 
> transmissions.)
> 
> If you sell an asterisk system into a digital pstn environment (eg, 
> PRI), any fax machine will work with Sangoma or Digium digital cards, 
> however the fxs interface to the fax machine "may be" very questionable 
> in terms of reliability and usability.
> 
> If you sell an asterisk system with external pstn gateways (eg, ATA 
> adapters), better be careful as the majority of inexpensive gateways 
> will not function reliably with an analog fax machine.
> 
> If you're thinking T.38 fax capability, forget it for now. Some folks 
> were working on adding T.38 support into asterisk, but its not in stable 
> code as yet to the best of my knowledge.  Also, according to Steve 
> Underwood, T.38 implementations in current fax machines are of 
> questionable quality.
> 
> If you're thinking in terms of high volume faxing, then look towards the 
> hylafax (or whatever) approach.
> 
> If you're thinking in terms of faxing via VoIP providers, reliability 
> will be less then acceptable "if" you get it to work at all.
> 
> Bottom line: the most reliable method of integrating fax support into an 
> asterisk system "today" (without implementing hylafax or whatever) is 
> through the use of the Sangoma A200D analog card, as it keeps the pcm 
> data flow "on the card" (fxs -> fxo); and, removes the impact that pci 
> bus, shared interrupts, system applications, ethernet dropped packets or 
> jitter, ATA issues, and other disruptive elements from the analog fax 
> data path.
> 
> If you search the list archives for the past two years, you'll find a 
> couple of "point" solutions other then mentioned above that do work, but 
> most of them are "dependent" on some specific element (eg, full moon) 
> that cannot be reliably replicated in every asterisk installation.
> 
> 
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