Question about Uniden DCT648-3 Cordless Phone

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Uniden DCT648 register phone problem

I have the base unit, 3 charging units and 4 handsets. All 4 handsets currently have "Place handset on Main base to register" on the their LCDs. All handsets are fully charged after 20+ hours of charging. When I place the handsets on the base to register the phone I receive a "Registration failed" readout on the phones. I have tried registering the phones in excess of 20 times for each individual phone. The handsets and base all have matching number formats (I'm guessing these are model, manufacturing and serial numbers). There are no buttons that will work individually on the phones (although the keypad will light up). I have also tried pressing the "end" and "#" keys simulaneously with no result. The base will answer phone calls on the intercom. Any assistance to activate the phones would be greatly appreciated. Thank you.

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Re: Uniden DCT648 register phone problem

On the Base Station select HS Registration then on the Handset hold # for 2 sec

Posted on Apr 13, 2008

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Re: Uniden DCT648 register phone problem

From any of the other phones simply press the MENU button go down to SYSTEM RESET and hit SELECT. Then choose Deregister HS and choose the one that is giving you the problem. Once deregistered, place the phone on the base and it will now register.

Posted on Apr 05, 2009

Re: Uniden DCT648 register phone problem

I had a very similar situation and I did solve it. You have to have at least one phone that is correctly registered. You press "menu", go to "system reset" (press "select" key), go to "Replacing base" (press "select" key), go to yes (press "select" key). Now all of your phones need to be reregistered, but that worked fine for each. Apparently it has to release all of the old registration data before it accepts new phones. As the other user (and I followed his advice first) said, good luck in solving your electronic problems.

Posted on Jan 28, 2008

Re: Uniden DCT648 register phone problem

I have contacted Uniden about solving this problem. They suggested I clear the eeprom on the handsets and reset the base. To clear the eeprom detach all of the batteries and reattach while holding the star and pound. You'll hear a beep. Press select and the unit will clear the eeprom. Now hit end and the unit will say "Welcome...something or other". Next unplug the base unit reattach while holding delete. Next hit delete twice...the base is reset. Apparently this is the last possible solution to marrying the handsets and base. This didn't work for me and the units have been declared dead. Good luck in solving your electronic problems.

Posted on May 14, 2007

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Re: Uniden DCT648 register phone problem

If you are having trouble getting a message Registration Failed you may have to deregister an old handset no longer in use to make room on the system for the new handset

Posted on Sep 10, 2011

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I have Uniden DECT1480-3. I purchased two expandable handsets, but I cannot figure out how to get the new handsets to register with the base unit.

Up to 6 handsets can be registered with the DECT 1480 phones. I have the 5 phone unit and needed to add the 6th phone. All I got was "Searching" in the display and the battery wouldn't even charge!

So here's what you have to do to get additional phones (up to 6 units) to work with the base. If you can get past step 1, it's a snap...

Step 1: Place a charged battery in the handset. This could be a problem if all your handsets are not registered, since unregistered phones don't charge (who thought of that design?). What I did was SWAP the battery from an already registered and charged phone with the new unregistered phone.

Step 2: Here's where the magic happens. Press the 'END' and '#' keys simultaneously... hold them down until a System Reset menu appears. Select "Deregister HS" and press Menu.

Step 3: Now, do the same thing again (hold down END and #), but this time select Base Unavailable and press Menu. You will see Base Unavailable Yes/No... Select Yes. Then place the handset in the base, wait a few seconds, and Voila!. it's registered. You can even change handset numbers using this menu if you play around with it.

Thank you, helpful employee at Costco for supplying the magic code. And hey there, UNIDEN... including this in the operation manual would have saved many customers much grief with de-registered phones!


May 14, 2011 | Uniden DECT 6.0 Cordless Telephone...

1 Answer

How to re register base unit with handset i accidentally de-registered bse unit form the handset by going to base setting in handset option and okaying it. please help me.

Welcome to Fixya
Dear USer
Place your Extension Phone Near to Main for Few times Until it Beeps.OR it Ask for Registration like Please Register or Something like that.Follow the Steps carefully to Register it...Then Check it for Dial tone to Confirm.Some phones may display that the handset needs to be registered. If this appears-Move the handset near to base/main unit & press the "Prog/Mute". Next, press the "Pager" button on the base unit .Then press the "Prog/Mute" button on the handset again to complete the registration.
Hope you got it....Thanks for Connecting FixYa

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how do i register my new samsung rant phone ?

Oct 04, 2008 | Uniden DCT648-3 Cordless Phone

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How to register phones to base unit - uniden dct648

Unplug the unit again and press the intercom/find handset button while you re-connect the adaptor.  Then dock the phone unit once again and it will re-register.

Sep 14, 2008 | Uniden DCX640 Cordless Expansion Handset

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I need to reactivate my uniden cordless phone with remote extra handset. It was on a second phone line in my home, and that phoneline has been cancelled. Now, both units are charged, but and plugged into...

This should get the job done for you!

To re-register DXA14588-2 handsets:
  1. Pick up the handset from the base. Press and hold [find handset] on the base.
  2. While holding [find handset], place the handset in the base. The charge/in use LED on the base begins to flash, indicating the base is registering the handset. Wait for at least five seconds.
  3. Pick up the handset from the base and press [talk/flash]. If the display shows TALK, the handset is registered. If not, place the handset in the base to try again.
  4. Press [end].
  5. Place the next handset in the base and wait for at least five seconds. No need to hold [find handset] this time.
  6. Repeat steps 3 - with any other handsets you have.
Please let me know if you have any further questions.

Good Luck!

Aug 11, 2008 | Phones

1 Answer

Tru 9496


1. First, remove the battery cover on your unregistered TCX905 and look under the battery to confirm that you indeed purchased a TCX905 because some Uniden handsets were packaged as 905's but were not.

2. Take the fully charged unregistered 905 to the base unit TRU9496.

3. On the TRU 9496 base unit press "Menu" then select "Registration" and press OK

4. You should get the message "press the # key on the remote handset".

5. Depress the "#" key on the unregistered 905 and it should register.

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Adding a new handset

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.

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I just successfully registered 4 TCX905s with my TRU8865 base - it's documented in the TCX905 manual.

Be sure the handset you want to register is fully charged.

Remove the handset you want to register from its charger.

Now unplug the AC for the main base, hold down the 'find handset' key on the base and plug the AC in again, when it beeps, you can let go of that button.

Hold down the '#' on the handset you want to register, it will show 'Registering Handset...' and when it beeps, it's done - registered, you're good to go :)

Oct 11, 2007 | Uniden TCX905 Cordless Expansion Handset

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Doesn't anyone have an answer or some help? Please!!!!

Uniden TRU8885-2 Cordless Phone > User Guide E X P A N D I N G Y O U R P H O N E w w w . u n i d e n . c o m Register the Handset to the Base If you purchase an extra handset, you need to register the handset to the base before use. Only one handset can be registered at a time. The handset ID for the supplied handset(s) was assigned at the factory, which has #1 or #2 in the display (#2 for models that have two handsets in packaging). When you register additional handset to the base, the handset ID will be assigned. 1) Before registering the extra handset, the battery pack must be charged for 15-20 hours. 2) Place the extra handset in the main base unit to begin registration. 3) While the handset is registering, Handset Registering will appear in the LCD. When Registration Complete is displayed, the handset has been registered to the base. If Registration Failed appears, please try these steps again. Extra Handset Extra Handset Charger Charger Main Base Extra Handset + Main Base Charge the handset for 15-20 hours. Place the extra handset in the main base to register. 1 2 3 4 ?An extra handset can be registered when the main base is in standby mode. ?Standby Mode - The handset is not in use and talk/flash has not been pressed.

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