[cisco-voip] FXO Port failures

[Paul Choi]

Thomas,

What sort of signaling are you using on these ports?

--- Thomas Garman <TGarman at homesavings.com> wrote:

> 
>  
> 
> I seem to be having trouble at 2 of my sites, having
> constant failures
> of FXO ports (connected to the PSTN).  The port will
> work fine for about
> a day (sometimes 2), then the port will not "pick
> up" incoming calls, or
> make out bound calls.
> 
> When the port fails the debugs look like the telco
> is sending a
> disconnect to us, however in lab testing the bad
> ports, this is not the
> case (the port is sensing a disconnect, but none is
> actually being
> sent).
> 
> We have been able to move the problem line(s) to
> another port, which
> will work fine, and then after a day or two  will
> exhibit the same
> problem (failure).
> 
> We have gone through the shut/no shut, as well as an
> entire router
> reload, and router power cycle, and even an IOS
> upgrade (from 12.4.XC4
> to 12.4.9T3).
> 
> The port, once failed, cannot be recovered.
> 
> We have contacted TAC, and their solution was to
> send us new cards.
> 
> I have also engaged the telco (several times) to
> test the lines, and
> they report no problems.  
> 
> There seems to be something that is causing the
> ports to fail, and I was
> wondering if anyone else has ever seen this type of
> problem?   
> 
>  
> 
> Thanks in advance,
> 
> Tom G.
> 
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