[Asterisk-Users] Whitenoise on TDM400p

[denon]

At 03:31 PM 5/31/2003 +1000, you wrote:
> > I've seen exactly two people with this problem and it seems to be related
> > to the system that it's running in, although I don't know if it's power
> > supply, motherboard, or peripheral related, but somehow noise on the
> > system power supply creeps into the system.  On the systems that had
> > trouble, we found the noise was greatly improved by doing:
> >
> > dd if=/dev/zero of=/dev/null &
> >
> > which basically spins the processor and keeps it from idling.  I'd like to
> > hear from you off-list about this experience.
>
>Could there be problems with noise on the line if you use a single CAT5
>cable to carry all 4 phone lines? That is what I have done (just attach 4
>rj-11 on each end) and while 2 of the lines seem fine, one seems to have a
>fairly loud 'buzzing' sound...
>
>Is that 'white noise' or is buzzing something different? Would/Should I use
>4 separate cables, or do I just need to redo some of the wiring to solve the
>problem?

Naah, you can do a lot more than that in a single bundle, unless there's 
something wrong with your wire .. a crimp somewhere, some scraped up 
insulation, etc.  Just make sure you have your pairs right .. now *that* 
could cause some interesting problems. :)

-d



>Regards,
>Adam
>
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