Posted by cenorthamerica on January 21, 2005, 11:44 pm
My friend has two wireless phones in his townhouse. For the last three
weeks or so he gets a high pitched screeching sound that when he's on
the phone (like when talking to me). He tried plugging in a line phone
and this works fine. The phone company says they do not know what it is
and it may take a lot money for them to find out. My theory is that
there is neighbor that has something that is interfering with the
phones. Could this be true? How do we find out?
Posted by Robert Morien on January 22, 2005, 12:11 am
cenorthamerica@yahoo.com wrote:
> My friend has two wireless phones in his townhouse. For the last three
> weeks or so he gets a high pitched screeching sound that when he's on
> the phone (like when talking to me). He tried plugging in a line phone
> and this works fine. The phone company says they do not know what it is
> and it may take a lot money for them to find out. My theory is that
> there is neighbor that has something that is interfering with the
> phones. Could this be true? How do we find out?
>
My theory is that he has a wireless router somewhere near his wireless
phone base station.
Posted by Joshua Putnam on January 22, 2005, 12:14 am
cenorthamerica@yahoo.com says...
> My friend has two wireless phones in his townhouse. For the last three
> weeks or so he gets a high pitched screeching sound that when he's on
> the phone (like when talking to me). He tried plugging in a line phone
> and this works fine. The phone company says they do not know what it is
> and it may take a lot money for them to find out. My theory is that
> there is neighbor that has something that is interfering with the
> phones. Could this be true? How do we find out?
You can figure out if it's wireless interference with two simple tests:
try the wireless phones somewhere else, and try a wired phone on his
jack to see if the noise is still there. If the phones only make noise
at his location, and a corded phone does not, then the problem is
specific to wireless, and RF interference is a good bet.
There can be interference between some wireless phones and some wireless
computer networking setups. Any neighbors go WiFi lately?
--
josh@phred.org is Joshua Putnam
<http://www.phred.org/~josh/>
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Posted by Bob Vaughan on January 24, 2005, 2:43 am
>cenorthamerica@yahoo.com says...
>> My friend has two wireless phones in his townhouse. For the last three
>> weeks or so he gets a high pitched screeching sound that when he's on
>> the phone (like when talking to me). He tried plugging in a line phone
>> and this works fine. The phone company says they do not know what it is
>> and it may take a lot money for them to find out. My theory is that
>> there is neighbor that has something that is interfering with the
>> phones. Could this be true? How do we find out?
>You can figure out if it's wireless interference with two simple tests:
>try the wireless phones somewhere else, and try a wired phone on his
>jack to see if the noise is still there. If the phones only make noise
>at his location, and a corded phone does not, then the problem is
>specific to wireless, and RF interference is a good bet.
>There can be interference between some wireless phones and some wireless
>computer networking setups. Any neighbors go WiFi lately?
It could be WiFI, but it could also be wireless cameras, or any other
device operating in the same band.. (I'm assuming 2.4Ghz band..)
If it's a constant screeching, I'm betting on a camera, or baby monitor,
since WiFi devices are spread spectrum, and are more likely to appear as
pulses. Bluetooth devices are another suspect, but again are more likely
to appear as a pulsed signal.
If it's some device within his house, he has to make a choice of which one
is more important.. If it's a neighbor, he's out of luck, unless he can
convince the neighbor to be a nice guy.. Since all the cordless phones
are part 15 devices, he basicly has no rights when it comes to interference.
He might try getting a different cordless phone, preferably one that operates
in the 5.8ghz band.. It's still a part 15 device, but there is a lot less
activity in that band to cause interference.
--
-- Welcome My Son, Welcome To The Machine --
Bob Vaughan | techie@.stanford.edu | kc6sxc@w6yx.ampr.org
| P.O. Box 19792, Stanford, Ca 94309
-- I am Me, I am only Me, And no one else is Me, What could be simpler? --
Posted by Rich Greenberg on January 24, 2005, 9:30 am
>He might try getting a different cordless phone, preferably one that operates
>in the 5.8ghz band.. It's still a part 15 device, but there is a lot less
>activity in that band to cause interference.
Probably not a good solution, as most "5.8 gHz phones" use 5.8 one way
and 2.4 the other way.
I would suggest a 900 mHz phone instead.
--
Rich Greenberg Marietta, GA, USA richgr atsign panix.com + 1 770 321 6507
Eastern time. N6LRT I speak for myself & my dogs only. VM'er since CP-67
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> weeks or so he gets a high pitched screeching sound that when he's on
> the phone (like when talking to me). He tried plugging in a line phone
> and this works fine. The phone company says they do not know what it is
> and it may take a lot money for them to find out. My theory is that
> there is neighbor that has something that is interfering with the
> phones. Could this be true? How do we find out?
>