Had to buy a new base for phones and got one phone with new base unit, within phone menus there is a place to Deregister the handset, but I can not locate how to Register the other handsets and nothing is mentioned in the manual about this subject. This of couse means I can't used the other hand sets. How or even can this be done ?

Unfortunately, the old handsets may not be compatible with the new base. The DS6251-2 base only communicates with the DS6250 accessory handset. See the accessory list here: https://www.vtechphones.com/store/pd/4158/DS6251-2-2-Line-2-Handset-Cordless-Phone-with-Answering-System-Smart-Call-Blocker . If the old handsets have been deregistered from the previous base unit, place a handset in the cradle on the base. Wait to see if the handset is registered. Alternately, press and hold Page until you see Registering. Release the Page button. Then press Quiet/# (below 9) on the handset. Wait for the handset to be registered.

To deregister handsets from the DS6251 base, press and hold Page. You'll see Registering Please Wait followed by Deregister all devices? At this point, release the Page button. Then press and release Page or the soft key for Yes.

I hope this helps. These are shown in the manual for the accessory handset. The manual is on available on the accessory handset page: https://www.vtechphones.com/store/pd/4184/DS6250-2-Line-Accessory-Handset-for-DS6251-series-phones . The current link to the manual is https://cdn-web.vtp-media.com/products/DS/DS6250/DS6250_CIB_V2_20200623.pdf .

Cindy Wells

This sounds like the handset has lost its "registration" with
the base. De-registering & re-registering is often easy.

First, be sure the handset battery is well charged as a
weak battery will interfere with the registration process.
Then try this ( 'works for the D1680, D1481, & similar):

To deregister the handset:

1. Press and hold the [END] and [ # ] keys at the same time,
after a few seconds the display will say
"System Reset, Deregister Handset"
press [SELECT]
scroll to "Base Unavailable"
press [SELECT] (chirps) press [END]
display reads "Place in base..."

Next, to re-register the handset:

2. Set the handset into the base cradle and wait,
within ~30 seconds the handset should display
a "Handset #" and be good to go...

Good luck!
--------------

Found out how to change the handset number [1] [2] [3] [4] etc on a Panasonic Cordless handset

Panasonic KXTG6644B

Changing Handset Number:
Deregister two Handsets [#1 & #2] 0r [#3 & #4] etc

On each handset hit -
[MENU] # 1 3 1
[ERASE] [YES]

(This leaves and open space on the base unit)

Re-Register 1st Handset [#1]
[MENU] # 1 3 0
Hold [LOCATION] on Base Unit 5 Seconds
Place the Handset you want #1 in Base Unit

Re-Register 2nd Handset [#2]
[MENU] # 1 3 0
Hold [LOCATION] on Base Unit 5 Seconds
Place the Handset you want #2 in Base Unit

Hello Linda,

See if my FixYa Answer from this previous post helps to Deregister and Register your old handsets to your new base.:

My phone says no link to base but am right beside it

Regards,

-Ellsworth

If your handset will not deregister, before registering it on a base. Here are the steps;

Menu/Select *7890#
It will display "Test Base" arrow up to "Test Handset"
Press Menu/Select It will display "SW Version"
Arrow up to "next page"
Menu/Select to display "Regstr Clear"
Menu/Select to display "Reg Clear?"
Menu/Select you should hear a beep.
Unplug battery and wait 10 seconds. Lug in battery and place phone in base to register it.
No other handset can be in use when you register new handsets.

Worked great for my 3 handsets that were registered to a base that went bad.

First, select Deregister HS from the main menu. Secondly, press the red phone button and the # key simultaneously for about 5 seconds to finish deregistration. You will then see a message telling you to place the phone in the cradle of the base unit to register it to your unit. An "operation complete" message will confirm that the handset is now registered and ready to use. Good luck.

Hi,

Following may be the cause for getting no link to the base.

1. The handset has lost communication with the base unit.Move closer to the base unit, and try again.

2. Confirm that the base unit’s AC adaptor is plugged in.

3. Raise the base unit antenna.

4The handset’s registration may have been cancelled .Re-register the handset.

To Register, follow the below steps.

Headset: Press MENU and then press ‘0’ ‘0’

Base unit: Press and hold HANDSET LOCATOR until the CHARGE indicator flashes.

(After the CHARGE indicator starts flashing, the rest of the procedure
must be completed within 1 minute.)

Handset: Press OK, and then wait until the handset beeps.

Your handset is registered to Base unit.

Thank You

you dont need to deregister it if you have not registered all 8 hand sets with your base unit. Just register the new one and the base will assign a new # for this new. I you had registered 8 hand sets with your base already, you need to remove(deregister0 one handset from your base(it can take only upt 8).
If it still not registering please deregister as follows:
on the base unit, press program, them mute, then enter 335#, then enter the handset number you wish to deregister.
after deregistering try to register your new hand set.

If you are not too far away-not "out of range" then try rehoming/pairing the handset with the base unit. You probably need the phones together to do this. Your manual will explain how-it will have been done in the original setup.

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