[cisco-voip] FXS module breaking

[David Wilson]

Hi guys,

I'm still really lost with this. Any assistance or ideas would be greatly 
appreciated.

Kindest regards
David Wilson
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Tel +27 33 342 7003
Fax +27 33 345 4155
Cell +27 82 4147413
http://www.dcdata.co.za
support at dcdata.co.za
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"Computers are not intelligent. They only think they are."

----- Original Message ----- 
From: "David Wilson" <dave at dcdata.co.za>
To: "Jim McBurnett" <jim at tgasolutions.com>; "Mike Armstrong" 
<mfa at crec.ifas.ufl.edu>; <cisco-voip at puck.nether.net>
Sent: Friday, March 18, 2005 7:32 AM
Subject: Re: [cisco-voip] FXS module breaking


> Hi guys,
>
> How are you keeping ?
> Still battling with this....
> Seems that I was a little confused as to how this setup was working. You 
> were correct. The FXS module is plugged into their 'incoming' line ports 
> of their PBX, so there should not be an issue with voltage etc. from the 
> PBX The Cisco FXS module does not receive ringing voltage etc. it 
> transmits it to the PBX's incoming line.
>
> With regards to the module popping:
> Could their router perhaps have the wrong FXS module in it ? Perhaps their 
> router is pushing out a higher voltage than the module should use ? Is 
> this possible ?
> Are their different voltage requirements for different FXS modules ?
> Thanks for your help so far.
>
> 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: "Jim McBurnett" <jim at tgasolutions.com>
> To: "Mike Armstrong" <mfa at crec.ifas.ufl.edu>; "David Wilson" 
> <dave at dcdata.co.za>; <cisco-voip at puck.nether.net>
> Sent: Thursday, March 03, 2005 3:58 AM
> Subject: RE: [cisco-voip] FXS module breaking
>
>
> Here is an idea for you:
>
> Go to Radio Shack- and buy one of these:
> http://www.radioshack.com/product.asp?catalog%5Fname=CTLG&category%5Fnam
> e=CTLG%5F011%5F008%5F002%5F000&product%5Fid=22%2D812
>
> Then get a spare PC, and connect it to the meter. Set it up to monitor
> the voltage in and out of the card on each port for a period of time-
> I'd say 24 hours per port..
>
> The links Mike sent  (THANKS MIKE, I was looking for those..) will help
> you put some perspective to it.
>
> I am willing to say this might solve the puzzle.
>
> As an FYI, I have done this kind of thing before using a meter, albeit
> older than this one.
>
> Let me what what you find.
>
> Thanks,
>
> Jim
>
>
> -----Original Message-----
> From: Mike Armstrong [mailto:mfa at crec.ifas.ufl.edu]
> Sent: Wednesday, March 02, 2005 11:25 AM
> To: David Wilson; cisco-voip at puck.nether.net
> 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_note09186a
> 008011c7f3.shtml
>
> http://www.cisco.com/en/US/tech/tk652/tk653/technologies_tech_note09186a
> 0080094fac.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
>>
>
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