[cisco-voip] FXS module breaking

[Mike Armstrong]

Wow.  "Just stops working" is a little ambiguous.  If a reboot of the router 
doesn't help, then I think you can rule out software, and I gather that 
replacing the module fixes things, so it's almost certainly hardware.  If it 
were me, I'd just buy a couple of spares (check eBay) and keep my Smartnet 
contract paid up.  After you send in a few for replacement, eventually Cisco 
might get interested in finding out what's wrong with them.  Even if you 
don't have a service contract, you might persuade Cisco to analyze one to 
determine why it failed.  Here's a couple of links to CCO tech docs that 
might help, but unfortunately don't give a step-by-step troubleshooting 
baedeker:

http://www.cisco.com/en/US/tech/tk652/tk653/technologies_tech_note09186a008011c7f3.shtml

http://www.cisco.com/en/US/tech/tk652/tk653/technologies_tech_note09186a0080094fac.shtml

I'm still betting on an external problem that zaps the interface.  The 
startup diagnostics would check out most of the inboard circuitry, I'd 
guess, but can't do much to check the outside interface.  If there's any 
chance of that, a simple surge protector on the line might solve the 
problem.  There may be a loopback test of some sort you could try, but I 
couldn't find any info on that handily.

mike

----- Original Message ----- 
From: "David Wilson" <dave at dcdata.co.za>
To: "Mike Armstrong" <mfa at crec.ifas.ufl.edu>; <cisco-voip at puck.nether.net>
Sent: Wednesday, March 02, 2005 6:10 AM
Subject: Re: [cisco-voip] FXS module breaking


> Hi Mike,
>
> Thanks for your response.
> From what I can understand it seems the FXS module just stops working. Are 
> the some tests I could perhaps run in the router to give me more info ?
>
>
> Kindest regards
> David Wilson
> _______________________________
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>
> ----- Original Message ----- 
> From: "Mike Armstrong" <mfa at crec.ifas.ufl.edu>
> To: <cisco-voip at puck.nether.net>; <dave at dcdata.co.za>
> Sent: Tuesday, March 01, 2005 1:39 PM
> Subject: [cisco-voip] FXS module breaking
>
>
>> What't the nature of the connection?  I'm wondering if an induced current 
>> is zapping the analog interface -- lightning, wire passing by a large 
>> load of some kind, etc.  Any more detail about exactly what "breaking" 
>> means?
>>
>> Mike Armstrong
>> UF/IFAS CREC
>> Lake Alfred, FL
>