[Asterisk-Users] An anniversary and a lament for FXOs

[Dave Henderson]

Hi Rich,

I've had good success with the cards in HP ProLiant ML110 servers, as
well as on clones with Asus P4C800-E motherboards.  I believe the
chipset on both of these systems is the Intel 875/ICH5...

FYI, I'm not in the US -- I'm in Canada.  But that doesn't make a
difference as far as PSTN signalling goes.

HTH

--
Dave Henderson
Customer Service Manager
The IT Department, Inc.

-----Original Message-----
From: Rich Adamson [mailto:radamson at routers.com] 
Sent: November 3, 2004 10:33 AM
To: Dave Henderson
Subject: RE: [Asterisk-Users] An anniversary and a lament for FXOs

Hi Dave,

Any chance that you could pass along some of the specific system and/or
motherboard model numbers that work with the tdm card?

I'm in the same boat as Michael, and have tried the x100p's, tdm04b,
spa3k, mediatrix, and others. I'd like to get the tdm04b working in a
stable production environment, and based on many previous posts, it
would appear to be an issue with interrupt latency and/or pci controller
problems with certain motherboards. I'd love to hear some examples that
actually work (no echo) in the US.

Rich Adamson
radamson at routers.com

------------------------
> Hi Michael,
> 
> You mention the X100P -- I agree, it's not a great card.  I've had all

> sorts of issues with mine, though I've lived with it for one of my 
> not-so-important Asterisk PBXes.
> 
> One device it seems you haven't tried is the Digium TDM400P with an 
> FXO module...  I've used a pile of these, and have generally been very

> pleased with them.
> 
> --
> Dave Henderson
> Customer Service Manager
> The IT Department, Inc.
> 
> -----Original Message-----
> From: asterisk-users-bounces at lists.digium.com
> [mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of 
> mgraves at mstvp.com
> Sent: November 3, 2004 10:14 AM
> To: Asterisk Group
> Subject: [Asterisk-Users] An anniversary and a lament for FXOs
> 
> This week marks one year since I first setup an Asterisk server in the

> hopes of transitioning my home office to a total VoIP system. The 
> process has been an incredible learning experience. I've tried 
> numerous IP hard phones, eventually settling upon the Polycom IP600 as
my choice.
> I've also used multiple ATAs including all the Sipura products.
> Using Asterisk has been a challenge, a thrill and (when its working) a

> joy. However, the one thing that I am not satisfied with is the 
> performance of the FXO interfaces that bring in my PSTN lines.
> 
> I've tried X100p cards but found them horribly unreliable. I presently

> use Sipura SPA-3000s but they're only marginally better. How is it 
> that my Panasonic 4 line SOHO phone system (KX-TG4000B) can have four 
> stable, reliable FXOs with no echo at all in a device with a total 
> cost of <$500? It seems to me that there ought to be hardware 
> available that behaves just as well, but bridges the PSTN to the
SIP/IAX domain?
> 
> I've read a lot on the list about how difficult designing FXOs can be,

> but that flies in the face of the fact that every small multi-line 
> phone system has them...and without expection those behave better than

> the devices I've been able to try with Asterisk. The Sipura SPA-3000 
> has several settings to adjust for line impedance and 
> inductive/capacitive line loading....lots of settings, but it provides

> nowhere near the basic performance of one of the lines on the 
> Panasonic KSU. It's simply mind boggling.
> 
> So, while I've posted with respect to FXOs previously, I must ask 
> again....what FXO interface device can anyone recommend from real 
> experience?
> 
> Michael
> 
> P.S.  -  I even investigated switching my lines to ISDN to get around 
> the need for FXOs, but SBC won't do it where I live.
> --
> Michael Graves                           mgraves at pixelpower.com
> Sr. Product Specialist                          www.pixelpower.com
> Pixel Power Inc.                                 mgraves at mstvp.com
> 
> o713-861-4005
> o800-905-6412
> c713-201-1262
> 
> 
> 
> 
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---------------End of Original Message-----------------