Adding a new phone: Existing Mod# DCT648-3; new handset Mod# DCT6485-3. New set says "out of range." How do I make the new handset work?

when the battery cover comes off there are a series of microswitches that are visible.. make sure the new ones are set with your originals..

The instructions worked after the additional KX-TGA402N handset was fully charged and I kept pressing the menu/ok button of the additional handset to advance from initial settings to the handset registration mode.


How do register an optional accessory handset to my existing main base...

possible that the new hand sets are not compatible with the base as it requires same hand sets as the base for the base to be able to register the handsets
follow the user manual to see if there is a how to register section that will help identify the problem

A search of Uniden support only said to call 1-800-297-1023 with handset registration issues. The rep picked up quickly and walked me through the reset procedure. Here it is step-by-step:

1. Remove battery
2. Hold down the * and # buttons and reinsert battery. You should hear a long beep. If not retry. (This is a bit awkward but hold the handset upside down and it's workable)
3. Screen will be blank. Immediately press the right soft menu button.
4. Screen will report that EEPROM is clearing and then state EEPROM Clear Ok
5. Remove battery (yes again)
6. Reinsert battery (this time there's no need to hold down any buttons)
7. Handset will reboot with Welcome screen and then state that phone must be registered (this is the status a handset should be in from the factory)
8. Place handset on base and it will register as normal

I had that problem when I changed handsets. You need to:

1. ensure the bluetooth setting is turned on on the handset
2. switch on the scala 500
3. press and hold the scala 500 power button until the red and blue lights are both flashing (you have to hold the button in for quite a few seconds)
4. now you can search for new bluetooth devices from your handset and it should find it to enable you to connect

You need to register the new handset with the base.
In Global settings De-register the new handset then place it on the main base unit connected. It should then register.

The phones have to have the same carrier frequency as the base set. The "out of range" display is because the frequencies are not matching. Check with the manufacturer (via website) and ask if your second handset can be programmed to a different base.

With a little searching I was not able to confirm this phone could handle more than one cordless handset. Are you replacing a defective handset or trying to add a second. If adding, do you know if it can handle the second unit (is it advertised on the box, in the user guide, etc?) If replacing, you most likely have to de-register the old handset on the base unit before you can register a new one. If you are adding, try de-registering the working handset anyway and registering the new one. If the new one registers and you cannot re-register the once working phone you will know either the system cannot handle two phones or (if the new one will not register but you can again re-register the original) that the new handset has a problem and should be returned.

You will need to register it to your base station before it will work. You do so by holding down the registration/page key on the bottom of your base for a couple of seconds, and then grab your SL30 and push Menu, scroll down to the option of Handset settings, press OK, then scroll to "registration" and push OK, select base station 1, press OK, then enter the default pin of 0000 and press ok. Repeat these steps if first not successful. You can download a manual for free on our website at www.cordlessrepair.com