[cisco-voip] FXS module breaking

Tue Mar 22 00:52:26 EST 2005

Hi Roland,

Thanks for your reply.
Unfortnuately I don't have a diagram however the setup is very simple.

At the remote office my client has a extension from their PBX into an FXO 
port on Cisco router. A leased line then connects the remote office to the 
local one. VOIP is sent over the leased line and breaks out an FXS port here 
which plugs into my clients local PBX.

For some reason the FXS port lasts for two weeks or so and then just dies. 
Each time the FXS port needs to be replaced.

Interesting one eh ? :)

Kindest regards
David Wilson
_______________________________
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Tel +27 33 342 7003
Fax +27 33 345 4155
Cell +27 82 4147413
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support at dcdata.co.za
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_______________________________

"Computers are not intelligent. They only think they are."

----- Original Message ----- 
From: "Roland H. Alden" <ralden at ralden.com>
To: "David Wilson" <dave at dcdata.co.za>
Sent: Saturday, March 19, 2005 5:42 PM
Subject: RE: [cisco-voip] FXS module breaking

Hi David,

I wasn't following the thread. Do you have a Visio diagram of exactly
what you have and what is connected to what? Clarity is the first step
:)

-R

> -----Original Message-----
> From: cisco-voip-bounces at puck.nether.net
> [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of David Wilson
> Sent: Friday, March 18, 2005 10:12 PM
> To: cisco-voip at puck.nether.net
> Subject: Re: [cisco-voip] FXS module breaking
>
> Hi guys,
>
> I'm still really lost with this. Any assistance or ideas
> would be greatly appreciated.
>
> 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: "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&cate
> gory%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
> >>
> >
> > _______________________________________________
> > cisco-voip mailing list
> > cisco-voip at puck.nether.net
> > https://puck.nether.net/mailman/listinfo/cisco-voip
> >
>
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