[MLB-WIRELESS] OT: RF emissions of Grandstream Budgetone 102 VoIP phones.

[T Wheatley]

Any chance it could be a crappy piece of Cat5?
Bodgy connector? Maybe the cable's pinched under a roof tile....??

bit simple, I know

----- Original Message ----- 
From: "Steven Haigh" <netwiz at crc.id.au>
To: "Jason Hecker" <jhecker at wireless.org.au>
Cc: <melbwireless at wireless.org.au>
Sent: Wednesday, December 01, 2004 10:42 AM
Subject: Re: [MLB-WIRELESS] OT: RF emissions of Grandstream Budgetone 102
VoIP phones.


> Jason Hecker said:
> > Hi,
> >
> > What is the make and model of the VoIP device?  Does it have a C-Tick
> > with Nxxxx designation or CE label?  How about an FCC EMC compliance or
> > equivalent Canadian compliance statement?  That's really piss poor if it
> > spams your radio like that.
>
> It's a Grandstream Budgetone 102 as seen at:
> http://www.grandstream.com/y-bt100.htm
>
> It does have a C-Tick sticker on the bottom, I'll have to look at this
> more when I get home...
>
> > As you can imagine, the cat5 is coupling
> > noise from within the device and acting like a honking great antenna.
>
> *nods*
>
> > It could be harmonics of parts inside the device or harmonics from the
> > ethernet signalling.  Is the noise always there or only when ethernet
> > data is transmitted?
>
> The noise is always present. It changes pattern when I press any buttons
> on the keypad or use the device, so maybe it's processor related? It
> doesn't matter if there's any ethernet traffic going on, as long as
> there's a cat5 cable plugged into the device so there's a link...
> Unplugging the CAT5, and the noise is gone - but that kinda defeats the
> purpose...
>
> > Regards
> > Jason Hecker
> >
> > Steven Haigh wrote:
> >> Hi guys,
> >>
> >> As some of you know, I've got myself a VoIP phone, however I'm trying
to
> >> find out if other peoples models emit a lot of RF noise in the 100 ->
> >> 160Mhz range...
> >>
> >> I have a good receiver on an external discone antenna, and whenever I
> >> plug
> >> the cat5 into the VoIP phone, the receiver is flooded with noise. It's
> >> enough to completely block out my reception of Essendon airport from my
> >> place...
> >>
> >> Anyone else able to check their phone?
> >>
> >
>
>
> -- 
> Signed,
> Steven Haigh
>
> I am root. If you see me laughing, you'd better have a backup.
>
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