Question about Vtech 5.8GHz Cordless Phone with Digital Answering System

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Interferes with my dsl

I am trying to get this phone to work! When I go online my phone is not able to detect that I am online, It has a busy signal like I have left the phone off the hook. My old phone does not have this problem, when I plug it in it works just fine, and I can be on the phone and internet at the same time, DSL. I bought this new phone because the old one is falling apart. This phone is a Vtech 5.8 model # IA5870. It is a two set phone with caller ID & answering machine. How can I fix this problem? Please help!!! I can't find the manual and threw the box away months ago.

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Re: interferes with my dsl

You can download the manual from the manufacturer's web site at

Posted on Jul 19, 2010

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One tel sigma 2200. No dial tone.

are you using dsl broadband this could interfere . Type of signalling may be a problem. If multi tone or decadic on phone line does not match phone settings but I would expect you hear dial tone. do you have cable plugged into a phone socket it could be a internet rj45 socket.They look the same at the wall especially in an office environment.

May 08, 2014 | Phones

1 Answer

My cordless phones crackle

Do you know what frequency the phones operate on? Many devices can interfere with cordless phone signals, including wireless routers, Bluetooth devices, and even microwaves.

Try moving the phones away from any of these devices and see if that helps. If you use DSL for your Internet service, make sure you have placed filters on all of the phone lines that don't go to the DSL modem.

Aug 09, 2010 | AT&T 650530003417 Cordless Phone

1 Answer

Constant static and noise on the cordless, have not had this problem with other phones in the same location. I have tried the frequency scan- no difference. The noise is so bad the cordless cannot be used.

The main causes of Hissing Noise on phone line

* Weather:
Precipitation can leak into phone lines and cause disruptions. Lightning, even at a distance, can damage the connection.
Checked the connections the cable and the Sockets
If you have the Test socket or the First Socket where the Telephone is is entering .. check the Connections there

* Electrical interference:
Check the Power lines,
Check radio or television transmitters, transformers and other electronic devices may causing noise on the phone line.

* Other phone devices:
Check for the Connection to the FAX check by unpluging the FAX Machine or answering machines,
Disconnect the other phones and line splitters --
Disconnect the Splitters or devices that allow two phones to fit on one phone jack -- can cause phone line noise.

* DSL services:
The high-frequency signals coming from DSL (digital subscriber line) devices sharing the phone line can create problems for other technology connected to the line.
Note : high-frequency signals coming from DSL helps for FAST Internet Connection speed which sometime cause the problem to the Phone or Voice signals for this need to contact to ISP to check the Voice margin .. that may effect your internet Speed

IF the above wont work..

You can try keeping the device near Heater .. it could be the Moisture which might causing this issue
Show the Device to the Service provider to repair it

Jan 22, 2010 | GE Telephone pr521w

1 Answer

Home power out while talking and now phone will not work phln OK

I threw it in the trash and do not need your help - please no more emails

Sep 17, 2009 | Panasonic KX-TG5672 Twin Cordless Phone

1 Answer

Cordless phone has volume problems with DSL

For starters that dsl modem should not be filtered.
You should place the splitter directly into the wall jack and place the filter on the side used for the phone. The side feeding the dsl line should not be filtered.
The filter serves 2 purposes. 1 it reduces data noise interference onto the voice line. 2 it prevents dsl interference from voice such as picking up and hanging up the receiver.

Aug 26, 2009 | Uniden Cordless Phone

1 Answer

My phone has been out for some time. Just noise on my phone. the outside plug in works fine, so I assume it is my inside wiring. This morning I unplugged all my phones, and hooked them up one by one. ...

Replace the DSL filter. it is needed to in order to prevent interference between phones and DSL service operating on the same line. Without the installation of DSL filters, high-frequency signals or echoes from analog devices can result in reduced performance and connection problems with DSL service, and the high-frequency signals from the DSL service can result in line noise and other issues for analog devices.

Aug 20, 2008 | Phones

1 Answer

No dial tones on all the phones.internet still works. when you dial the house, phone line has busy signal.

If you have dial up internet, turn off your computer and try it. If you have DSL then a wire has come loose at your phone box. There are 4 wires that come into your house from the phone connection. Phones use 2 of them and DSL uses the other 2.

Jul 12, 2008 | Phones

1 Answer


DSL line. Possible that filters are not plugged in. When DSL service is being used on your line, filters must be installed at every jack that is in use. The DSL signal can cause static/noise, squealing (similar to fax tones) and other issues on your line. (ex. Caller ID problems). In order to avoid having this issue, the service provider gives DSL filters to all customers when they sign up for service. These microfilters must be used because they allow your phones to work properly by blocking the high frequency DSL signals from being transmitted through the telephones. DSL filters should be plugged into EVERY phone jack that has a phone. If you are not using the filters provided by the telephone company, this will cause static/noise and possibly Caller ID issues on your phones that are plugged into jacks without filters. Please contact your service provider for filter information and proper installation. Interference: Other 2.4 GHz products. Other products that use the 2.4 GHz band can interfere with the use of this phone. Items include: Radio towers, pager towers, cell phones, other 2.4GHz cordless phones and 2.4 GHz intercoms or monitors. If any of these items are in the area, they can interfere with the performance of this phone; try relocating the phone. Other 5.8 GHz products. Other products that use the 5.8 GHz band such as home networking (wireless modems) other 5.8 GHz cordless products (phones etc.) can interfere with the use of this phone. Try relocating the phone. Interference from microwave. Microwaves work on the same frequencies as the 2.4 GHz phones. If the unit is on when the microwave is running, it is normal to experience static at that time. Do not plug this phone in the same outlet or near the microwave. Environmental. Normal radio operation. There may be places within your environment that a cordless phone will not work well. If the problem only occurs in certain areas of your environment, there is nothing wrong with the phone. Try channing channels. Surge protector or modem. Unplug modem or surge protector that is connected to the unit. Building structure limits range. Relocate telephone base near window when using telephone outside. Base unit located in basement or other low area. Relocate telephone base to higher location. The unit will get better reception if it is not located in a low area. Video displays, television sets and personal computers may cause interference. Video displays, television sets and personal computers can cause interference on this phone. Please relocate the phone to an AC outlet were there is no major appliance plugged in. If the base is near any of the above mentioned, locate the base to another room. Possible telephone line/service problem. Try using your equipment at a different location (i.e. friend or neighbors). If the unit functions properly in the new location, contact your local telephone company for assistance; additional charges to be incurred by customer may apply.

Feb 11, 2006 | Vtech VT 9152 Cordless Phone (VT-9152)

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