[Asterisk-Users] 3 x TDM400P in one PC ??

[Warren Burstein]

Joerg Wleklik wrote:

>Hi Folks,
>
>Does anybody have experiences with plugging 3 TDM400P cards in one PC??
>
>I think about a Asterisk box handling 8 incoming analogue lines and providing 
>4 lines to an old analogue PBX. 
>
>I read a lot about trouble with the TDM400P cards so this idea seams to be not 
>really god, or?
>
>  
>
We've got four TDM400P cards in one PC running without any trouble, 
since January.

It's not a fair comparison between new cards that come from Digium with 
support and a second-hand channel bank from Ebay.  If an analog phone 
interface doesn't work, I can figure out if the problem is the card, the 
wiring, or the phone with a voltmeter, and unless the entire card gets 
fried, it's just one phone that's out, and even so, unless the entire 
computer is fried it's only four.  If a T1 interface, technology with 
which I have no experience, fails, the entire system is out, and I don't 
have a clue how to find out what the problem is, is it the wiring?  The 
channel bank?  Is tab A plugged into slot B?  Did the channel bank turn 
up on Ebay because someone else couldn't get it to work either?  Lastly, 
I was told that I would have to bring in a technician to wire up a 
channel bank, I didn't have to do any wiring with the TDM400P's - I 
plugged in the cards, took the RJ-11's out of the PBX I was replacing, 
and plugged them in to the cards.