[RFI] 40M RFI from Ooma VOIP phone hub - HELP!

[Dennis Vernacchia]

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RFI<http://www.eham.net/forums/RFI>: 40M RFI from Ooma VOIP phone hub
- HELP!
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 *40M RFI from Ooma VOIP phone hub - HELP!*
  by KE6L <http://www.eham.net/user/profile/KE6L> on March 25, 2010
<http://www.eham.net/forums/mailto/29?id=3239>   Recently, I experienced RFI
on 7.040 MHz. It sounded like a buzz saw, with many sidebands +/- 10 KHz.
The signal was 20 dB over S9 on my FT-1000D. N6KI assisted me, and we chased
the problem to a neighbor about a block away. It did not take long to
isolate the source: An Ooma phone hub VOIP phone. People buy these for $250
and get free phone calls over the net. It's just the hub - you plug a phone
into it. You also plug it into your residential telephone wiring (after
disconnecting from the local carrier), so you can use other jacks.

I tested the unit, and it is always oscillating. Most of the energy radiates
from the unit via the "wall" jack, which is what you use to access your
house wiring system (just my luck - nice antenna). The oscillation frequency
is stable. If you unplug the "wall" jack, problem is gone (will only radiate
2-3 feet).

I've tried contacting Ooma, and they are stonewalling me. FCC Part 15 has no
limits for radiation under 30 MHz (thanks FCC). There is some language about
ALL radiations being minimized, however. How do I get to Ooma engineering?
They are selling thousands of these things, and they are the kiss of death
for 40M CW. Anybody know who/where Ooma engineering is?

For a picture of the FCC label and model number for this unit, please use
this link: www.jenmat.com/ooma.jpg.


Jeff KE6L   jsloane1 at san.rr.com