[Asterisk-Users] Weird issues with TDM400P

[John Novack]

Jeremy Gault wrote:

> We have a TDM400P installed here with four FXS modules.  It works well 
> except for a couple of issues:
>
<snip>

>
> Second, one of our ports has static on it.  A tenant moved in and we 
> configured their fax for our fourth (until then unused) FXS port. 

Confirm it is the module and not the TDM base card by swapping modules 
and see if the static follows the module, then RAM the module from 
Digium, assume you can convince them there is a problem.
<snip>

> However, between those two clicks, there's some sort of weird noise.  
> It's not a radio station or anything.  It's more like a whine of sorts. 
>
That seems to be a problem in the FXS modules.
I have two configured as Ground Start ( which Digium says they don't 
support ) and when in an idle condition, there is that noise that I 
presume is some data the module is leaking through.
As long as you have a clean talk path  I wouldn't be concerned with this 
minor flaw.

Good luck with the rest

John Novack