[cisco-voip] FXS module breaking

[David Wilson]

Hi Mike,

Thanks for your reply and the links.
I will have a look and see what I can figure out.

>From what I can see the problem definitely appears to be an electrical fault 
with the modules. As time goes on I'm beginning to believe that something 
from the existing PBX is burning them out, although there is no visible 
physical damage on the modules.


Kindest regards
David Wilson
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----- Original Message ----- 
From: "Mike Armstrong" <mfa at crec.ifas.ufl.edu>
To: "David Wilson" <dave at dcdata.co.za>; <cisco-voip at puck.nether.net>
Sent: Wednesday, March 02, 2005 6:25 PM
Subject: Re: [cisco-voip] FXS module breaking


> 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
>> _______________________________
>> D c D a t a
>> Tel +27 33 342 7003
>> Fax +27 33 345 4155
>> Cell +27 82 4147413
>> http://www.dcdata.co.za
>> support at dcdata.co.za
>> Powered by Linux, driven by passion !
>> _______________________________
>>
>> "Computers are not intelligent. They only think they are."
>>
>> ----- 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
>>
>