I have the Vtech cs6229-5 handset cordless phones. We have been using them for a little over a year with no problems. About two weeks ago I started noticing static on the line and it has gotten a little worse. It is on every line. We have a regular wall phone so we know it's not the line. Nothing has changed, no new electronics, etc. We have also tried unplugging all sets from the wall and unplugging all batteries and leaving them like that for 10 minutes and then plugging everything back in, but the static is still there, I would love to figure this out as we really enjoy these phones but it is getting hard to use them.

SOURCE: Not Registered

I had the same problem and this procedure fixes it! First, unplug the power to the main base (answering machine) for 20 seconds. Plus it back in. Put the phone that says "not registered" in the main answering machine. It will say "press the find handset for 4 seconds". Do that. It will run thru a series of stuff and will find the handset. It works! Rich (jambones.com)

SOURCE: Vtech phones loosing connection to base

You are pretty close to the solution. The problem is the charge detection in the handset. All handsets on a cordless phone detect the battery level with an hexadecimal value in the memory. Each hex value equal a volt value of the battery. EX: 3.5v = 9B
3.6v = 9C 3.7v =9D etc... The problem is the hex value in your defective handset are all mess up. So 9B is not 3.5v anymore. Then your handset could last 1hr after foul charge or doesn't alert you before the phone goes dead due to low BAtt.

SOURCE: Not Registered Problem

This worked for the 7100, hopefully it works for other models:

When the handset says "not registered", it should still have a "menu" option. Select that, then the only choice is "register", select Ok. Now it says "searching for base", press and *hold down* the "locate handset" button on the base until the handset beeps and wakes up. Docs say this could take up to 30 seconds (it was about 17 for mine).

manikandan murthy

• 129 Answers
• Posted on Jul 18, 2009

SOURCE: I have a Vtech Multi Cordless Handset System

here is it . rate me if i had helped.

http://www.vtechphones.com/vtechui/support/manual_list.cfm

SOURCE: new vtech phone model cs6229-3 headset keeps saying line in use

These phones look at the voltage on the line to determine if the line is in use.

Do you have any devices on the line that get power from the phone line? If so, they may be loading down the phone line causing this issue. If you have these types of devices on your line, try disconnecting those devices and see if the problem goes away.

Otherwise, your phone line may be defective. You may need to contact your phone company to get the problem resolved.