Question about IBM 2.4GHz Phone

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2.4GHz cordless phone interference with my laptop

Every time I make a phone call or receive a call, my wireless laptop loses its internet connection. I have tried changing the channels on the phone, but it doesn't help. Is there anything else that can be done?

Thank you.

John

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The 2.4 spectrum only has 3 channels that don't overlap. There are a total of 14 channels in all. Channels 1,6,11 don't overlap with other devices. Set your wireless access point to 6 (strongest channel) and your phone to another non-overlapping channel (1, 11). That should solve your problem. If it does not, then one of the devices you have is not digitally tuned and is causing interference on neighboring channels. The proximity of the phone's base station in relation to the wireless access point or laptop can also have an effect especially if the spectrum is dirty. Hope this helps!

Posted on Dec 12, 2013

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1 Answer

Will your internet box interfear with a cordless phone if they are to close together ?


A wireless router and wireless network adapters can have interference issues with cordless phones. It depends on the network adapter frequency and the cordless phone's frequency. Most problems will occur with a phone that uses 2.4GHz. This frequency will interfere with 802.11b/g networks and single-band 802.11n wireless signals.

A DECT cordless phone operates at a different frequency from the 802.11g and 802.11n single-band and will not interfere with a wi-fi network with those modes.

However, some routers and wireless adapters can use the 5GHz range (802.11n and 802.11ac, among them). These can have a problem with cordless phones that use 5.8GHz. However, there is a simple solution to avoid much of the interference at 5GHz. First determine the frequency range of your phone by getting the FCC ID from the base of the phone. Then use Google or another search engine to find "FCC ID Search Form". It has been at http://transition.fcc.gov/oet/ea/fccid/ in the past. The first three characters are the Grantee ID for the search form. The rest is the product ID. Look for the SAR report for the phone and then (probably on the second page) find the TX frequency range and the Max RF output power tested. Now go to the wireless router's setting page and make sure that it is using channels that do not use the same frequency and power range. See http://bradsfavorite.com/avoid-interference-5-ghz-wifi-5-8-ghz-cordless-phones/ below the 5GHz Wifi Frequencies for a table with the channel and frequency ranges for routers.

Once everything is clear, you can visit ScanmySpeed.com and have an internet speed test to ensure that there is no disturbance in your connection.

Nov 01, 2014 | Lands Phones

1 Answer

Will a cordless phone interfear with your internet or the cordless phone if its to close to your internet box?


A wireless router and wireless network adapters can have interference issues with cordless phones. It depends on the network adapter frequency and the cordless phone's frequency. Most problems will occur with a phone that uses 2.4GHz. This frequency will interfere with 802.11b/g networks and single-band 802.11n wireless signals.

A DECT cordless phone operates at a different frequency from the 802.11g and 802.11n single-band and will not interfere with a wi-fi network with those modes.

However, some routers and wireless adapters can use the 5GHz range (802.11n and 802.11ac, among them). These can have a problem with cordless phones that use 5.8GHz. However, there is a simple solution to avoid much of the interference at 5GHz. First determine the frequency range of your phone by getting the FCC ID from the base of the phone. Then use Google or another search engine to find "FCC ID Search Form". It has been at http://transition.fcc.gov/oet/ea/fccid/ in the past. The first three characters are the Grantee ID for the search form. The rest is the product ID. Look for the SAR report for the phone and then (probably on the second page) find the TX frequency range and the Max RF output power tested. Now go to the wireless router's setting page and make sure that it is using channels that do not use the same frequency and power range. See http://bradsfavorite.com/avoid-interference-5-ghz-wifi-5-8-ghz-cordless-phones/ below the 5GHz Wifi Frequencies for a table with the channel and frequency ranges for routers.

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Often static is caused by RF or EM interference. The interference may be getting into the system though the power or telephone signal cable being near many other cables, or because the unit is situated next to a strong source of RF or EM field.

I recommend changing the location of your cordless phone, away from such noisy sources (microwave, router, DC charging adapters, computers, etc). Try the phone in an outlet that has nothing else on the circuit, if possible.

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Some cordless phones operate on the same frequencies as in-home wireless networks. I believe this is the 2.8 megahertz frequency. The phones and the wireless networks can interfere with each other.

Most newer cordless phones are higher frequency (5.8 megahertz?). Wireless networks shouldn't interfere with those phones, but there could be other things that could (e.g., transformers on power poles).

If the phones are new, you might consider taking them back and getting another model.

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1 Answer

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1 Answer

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The wireless signal is most likely your culprit. Wireless-B and Wireless-G signals operate at 2.4GHz frequency, which is the same that many cordless phones use.

Some wireless routers will allow you to change the channel that they broadcast on -- that might help your interference problem slightly, but it probably won't make it go away completely. Your best bet is to keep the cordless phone a good distance away from the computer and wireless router (if not in another room, at least on the other side of the room).

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Assuming your laptop connection is wireless - See if there is a frequency conflict with your wireless internet and the cordless phone.
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1 Answer

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