[Asterisk-Users] Digium cards, so disappointing !

[Joshua Colp]

Ryan Amos wrote:
> I am using a digium TE110P and a TDM04b (or whatever the one with 4 FXS
> ports is called) on a Dell PowerEdge 2850. No problems at all with
> faxing with a cheap fax machine, though the asterisk box almost never
> goes above 5% CPU usage unless there are some conference calls going on.
> I can run modems/faxes just fine (though the modem connections seem to
> have a bit more latency than through a POTS line, it is acceptable for
> our use.)
> 
> Just be sure to set echocancelwhenbridged=no and tweak your txgain and
> rxgain on the line (this is not a do it once and you're done thing, I
> had to go back probably 5 times over the course of 2 weeks to get the
> right numbers.) I am even doing a redirect to eFax (I'd do with asterisk
> but we already had an efax account and it works well enough) on one of
> my DIDs and it works great.
> 
> Quite honestly I found a lot of documentation on how faxing in Asterisk
> is hard, and I just never saw that. Maybe I got lucky with a magic
> combination of hardware and forgiving fax machine, but it kind of just
> worked the first time I tried it. Now, if only setting up a 'page all'
> function on Cisco 79XX SIP phones without using a line appearance was so
> easy...
> 
> -----Original Message-----
> From: asterisk-users-bounces at lists.digium.com
> [mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Rich
> Adamson
> Sent: Friday, April 14, 2006 8:37 AM
> To: Asterisk Users Mailing List - Non-Commercial Discussion
> Subject: Re: [Asterisk-Users] Digium cards, so disappointing !
> 
> Anton Krall wrote:
>> Problem is, how to make sure you system WILL have 100% on zttest
> before
>> buying the cards.. You need to have stability, compatibility and
> certainty
>> that what you buy is going to work :(
>>
>> Anybody had similar problems or success stories with sangoma cards? 
> 
> Running zttest on my box with both a TDM04b and A200D installed 
> indicates and average of 99.96% for both. Not sure how accurate that 
> might be as the A200D card appears as a 24 channel interface in terms of
> 
> /dev/zap even though only four ports are equipped.
> 
> The TDM04b won't support faxes on this box under any circumstances and 
> I've played around with about every possible pci latency, etc, change 
> that folks have suggested in the last two years.
> 
> Based on my heavily invested testing to date (which includes about two 
> years of doing this), the "only" usable fax support thus far comes from 
> using the A200D card with the fax machine directly connected to a fxs 
> port on that card, and an fxo (pstn) port on the exact same card. Those 
> fax tests have been 100% solid using a cheap/older Brother fax machine.
> 
> 
> 
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Some people have problems, some people don't. There is no way you can be 
prepared for every situation out there. We try our best.

-- 
Joshua Colp
Software Developer
Digium
P - 256-428-6066
C - 506-878-0147
jcolp at digium.com