Re: [asterisk-users] Heavy duty environment - Is TDM2400P suits?

Steve Totaro wrote:

Andrew Joakimsen wrote:   

On 8/21/07, Chris Mason (Lists) <lists@masonc.com> wrote:        

Steve Totaro wrote:            

You should have no problems.  Make sure you put surge protection and ground your POTS lines.  It is a small investment.  I have had SEVERAL FXO modules die or behave strangely after thunderstorms.  I cannot prove it was a surge, but logic would indicate that was the issue.                 

Steve, How are you providing surge protection? I have lost a couple of cards to storms also.               

 I did not ground them properly (they declined that option in the  original sales process) and they were from installations over one or two  years ago.   Since it was not really Digium's fault, I did not even bother with the  RMA process.  I may have tried if they were only a couple of months old.  I just bought new modules and billed the customer parts and labor.  I  also sold them and installed proper grounding and surge supression.  Thanks, Steve Totaro   _______________________________________________ --Bandwidth and Colocation Provided by http://www.api-digital.com--  asterisk-users mailing list To UNSUBSCRIBE or update options visit:    http://lists.digium.com/mailman/listinfo/asterisk-users   

Steve,

what is the proper grounding procedure and what does good grounding achieve?

In this instance we are in an office tower and have 13 POTS lines. There is a good ground hanging off the wall from the legacy system but what do I connect it to?
Is a surge/lightning protector product required or is there something more rudimentary can be done? The concern here is more with call quality than lightning/surge protection.

regards,

Drew

--  Drew Gibson  Systems Administrator OANDA Corporation www.oanda.com