[asterisk-users] OpenVox A400P01 vs Digium TDM401B

[Ade Vickers]

Gordon Henderson wrote:
> 
> > Other than the price (nearly £150 difference), is there any 
> particular 
> > reason not to pick an OpenVox A400-based solution for my UK 
> Asterisk needs?
> 
> None whatsoever.
> 
> I think the new digium cards are better at interrupt sharing, 
> but if that's not an issue for you, then go for it. I've 
> installed many OpenVox cards. Use Oslec too - works a treat.

Excellent, ta for that. I don't think interrupts will be a problem, this
will be the only PCI card in the system...

> > Caller ID is the only thing the AX-100P gave me hassle 
> with; does the 
> > A400 handle it any better? Remembering that UK CLID is presented 
> > between 1st & 2nd rings, using V22.bis tones IIRC. I 
> currently use a 
> > Pace modem (which has UK CLID capability built in) to 
> capture CLID info...
> 
> > Any thoughts much appreciated,
> 
> I think you're wrong about UK caller ID.. There is a line 
> polarity reversal, then caller ID is transmitted, then the line rings.

You're right, I'd forgotten the polarity reversal; that's what stumpst he
AX-100P card, which simply doesn't register the initial reversal. I thought
CLID came after the 1st ring, though? I'll check next time I'm on-site with
the Asterisk box...

> You'll need a patch for Zaptel to make it work reliably - 
> same problem with both Digium TDM400 and OpenVox A400 cards 
> too. (ie. it's a driver
> issue) Look for "zaptel-ring.diff" if stuck, email me and 
> I'll email my copy.

I think I already have it patched with every UK CLID patch I could find...