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Cordless Phones Cause Interference

Last response: in Wireless Networking
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November 3, 2004 11:55:21 PM

Archived from groups: alt.internet.wireless (More info?)

In one office, when the cordless 2.4ghz phone is used, the wireless network
hiccups, the connection is lost temporarily. Turn off the cordless phone,
wireless is back. Change cordless phone channel while talking the wireless
network works. I have changed the channels on the wireless (802.11b/g) setup
to 11, 10, 6, 7, and 3. I guess, I have more channels to try. The security
level of the routers does not matter, wep, none, wpa, same difference, the
interference is there.



I've seen the following solutions and wanted to get some feedback:



1) purchase a 900mhz cordless a corded phone (the 900mhz cordless phones are
easily listened in on, not secure. Is this true?)

2) switch channels on the 802.11b/g equipment (have more channels to try, I
have tried 5 of them to no avail)

3) purchase 802.11"a" setup (not a good one, current network cards are "b"
and "g")

4) purchase another5.8ghz cordless phone (did this, still some issues; my
5.8ghz cordless phone does not really transmit at a 5.8ghz band, supposedly
2.4ghz is still used)

5) move 2.4ghz cordless phone/base away from router/wireless access point
(did this, this solution did not work)

6) purchase a different brand of wireless router (some brands have less
interference. I've read articles on some brands being better than others)



What else should I try? Does the Belkin Pre-N solve anything?

Thanks,

Smith
Anonymous
a b F Wireless
November 4, 2004 1:22:08 AM

Archived from groups: alt.internet.wireless (More info?)

"Smith" <Smith@donotreply.org> wrote:

>1) purchase a 900mhz cordless a corded phone (the 900mhz cordless phones are
>easily listened in on, not secure. Is this true?)
>

The analog ones are easy to listen to. Digital is better, Digital SS is probably
secure enough for consumer calls.

>2) switch channels on the 802.11b/g equipment (have more channels to try, I
>have tried 5 of them to no avail)
>

Channel 1, 6 and 11 are isolated from each other. The others overlap.

>4) purchase another5.8ghz cordless phone (did this, still some issues; my
>5.8ghz cordless phone does not really transmit at a 5.8ghz band, supposedly
>2.4ghz is still used)
>

Yep. Some 5.8 phones use 2.4 for the return channel.
Anonymous
a b F Wireless
November 4, 2004 5:40:06 PM

Archived from groups: alt.internet.wireless (More info?)

In article <XCiid.75837$bk1.10229@fed1read05>, Smith@donotreply.org
says...
> In one office, when the cordless 2.4ghz phone is used, the wireless network
> hiccups, the connection is lost temporarily. Turn off the cordless phone,
> wireless is back. Change cordless phone channel while talking the wireless
> network works. I have changed the channels on the wireless (802.11b/g) setup
> to 11, 10, 6, 7, and 3. I guess, I have more channels to try. The security
> level of the routers does not matter, wep, none, wpa, same difference, the
> interference is there.
>

Smith,

It's not a good idea to use 2.4GHz cordless phones when you have
802.11b/g installed. I would strongly suggest using 900MHz cordless
phones instead. In the technical manuals on 802.11, it specifically
states to avoid the use of 2.4GHz cordless phones.

I assure you ALL cordless phones can be monitored independent of
frequency, as there are plenty of VHF/UHF/SHF receivers and monitoring
equipment available. Spread spectrum phones, on the othe hand,
certainly provide more security than single channel (or single-
frequency) phones. If you truly want security, corded phones are your
best answer.

Remember (and, many consumers simply don't understand this), a cordless
phone, regardless of what frequency it operates on, is a radio. It is a
UHF/SHF transceiver (transmitter/receiver), and thus, signals can be
received by anyone who owns a receiver capable of receiving those
frequencies. Obviously, some systems use encryption, which provide
significantly more security.

The NSA (National Security Agency) monitors certain telephone traffic
24/7.

Don
Related resources
November 9, 2004 12:52:43 AM

Archived from groups: alt.internet.wireless (More info?)

Ive got a horrible feeling that this is the cause of my dropped connection
problems lately.
Ive had two computers linked via 802.11b/g wireless network adapters for
some time and I have recently purchased some new cordless phones for home
oblivious to the possible interference issues.
If this is the cause of dropped connections is there anything I can do
without buying another new set of phones?


"Smith" <Smith@donotreply.org> wrote in message
news:XCiid.75837$bk1.10229@fed1read05...
> In one office, when the cordless 2.4ghz phone is used, the wireless
network
> hiccups, the connection is lost temporarily. Turn off the cordless phone,
> wireless is back. Change cordless phone channel while talking the wireless
> network works. I have changed the channels on the wireless (802.11b/g)
setup
> to 11, 10, 6, 7, and 3. I guess, I have more channels to try. The security
> level of the routers does not matter, wep, none, wpa, same difference, the
> interference is there.
>
>
>
> I've seen the following solutions and wanted to get some feedback:
>
>
>
> 1) purchase a 900mhz cordless a corded phone (the 900mhz cordless phones
are
> easily listened in on, not secure. Is this true?)
>
> 2) switch channels on the 802.11b/g equipment (have more channels to try,
I
> have tried 5 of them to no avail)
>
> 3) purchase 802.11"a" setup (not a good one, current network cards are "b"
> and "g")
>
> 4) purchase another5.8ghz cordless phone (did this, still some issues; my
> 5.8ghz cordless phone does not really transmit at a 5.8ghz band,
supposedly
> 2.4ghz is still used)
>
> 5) move 2.4ghz cordless phone/base away from router/wireless access point
> (did this, this solution did not work)
>
> 6) purchase a different brand of wireless router (some brands have less
> interference. I've read articles on some brands being better than others)
>
>
>
> What else should I try? Does the Belkin Pre-N solve anything?
>
> Thanks,
>
> Smith
>
>
Anonymous
a b F Wireless
November 14, 2004 8:49:07 PM

Archived from groups: alt.internet.wireless (More info?)

On Wed, 3 Nov 2004 20:55:21 -0800, Smith spoketh

>In one office, when the cordless 2.4ghz phone is used, the wireless network
>hiccups, the connection is lost temporarily. Turn off the cordless phone,
>wireless is back. Change cordless phone channel while talking the wireless
>network works. I have changed the channels on the wireless (802.11b/g) setup
>to 11, 10, 6, 7, and 3. I guess, I have more channels to try. The security
>level of the routers does not matter, wep, none, wpa, same difference, the
>interference is there.
>

Get a "802.11 friendly" 2.4GHz phone. These are usually labeled "DSS" or
"Digital Spread Spectrum". I've had a VTech 2651 for a while now, and it
never interferes with my wireless network.



Lars M. Hansen
http://www.hansenonline.net
(replace 'badnews' with 'news' in e-mail address)
November 15, 2004 1:09:34 AM

Archived from groups: alt.internet.wireless (More info?)

On Mon, 8 Nov 2004 21:52:43 -0000, "Drummerboy"
<steve.wicks@"nospam"dsl.pipex.com> wrote:

>Ive got a horrible feeling that this is the cause of my dropped connection
>problems lately.
>Ive had two computers linked via 802.11b/g wireless network adapters for
>some time and I have recently purchased some new cordless phones for home
>oblivious to the possible interference issues.
>If this is the cause of dropped connections is there anything I can do
>without buying another new set of phones?
>
>
>"Smith" <Smith@donotreply.org> wrote in message
>news:XCiid.75837$bk1.10229@fed1read05...
>> In one office, when the cordless 2.4ghz phone is used, the wireless
>network
>> hiccups, the connection is lost temporarily. Turn off the cordless phone,
>> wireless is back. Change cordless phone channel while talking the wireless
>> network works. I have changed the channels on the wireless (802.11b/g)
>setup
>> to 11, 10, 6, 7, and 3. I guess, I have more channels to try. The security
>> level of the routers does not matter, wep, none, wpa, same difference, the
>> interference is there.
>>
>>
>>
>> I've seen the following solutions and wanted to get some feedback:
>>
>>
>>
>> 1) purchase a 900mhz cordless a corded phone (the 900mhz cordless phones
>are
>> easily listened in on, not secure. Is this true?)

Dunno, but my wirelass phone is on the 900mhz band.
>>
>> 2) switch channels on the 802.11b/g equipment (have more channels to try,
>I
>> have tried 5 of them to no avail)
>>
>> 3) purchase 802.11"a" setup (not a good one, current network cards are "b"
>> and "g")
>>
>> 4) purchase another5.8ghz cordless phone (did this, still some issues; my
>> 5.8ghz cordless phone does not really transmit at a 5.8ghz band,
>supposedly
>> 2.4ghz is still used)
>>
>> 5) move 2.4ghz cordless phone/base away from router/wireless access point
>> (did this, this solution did not work)
>>
>> 6) purchase a different brand of wireless router (some brands have less
>> interference. I've read articles on some brands being better than others)
>>
>>
>>
>> What else should I try? Does the Belkin Pre-N solve anything?
>>
>> Thanks,
>>
>> Smith
>>
>>
>
!