I have a tru9466 which has 3 defunct handsets registered. I'm using all 10 capabilities. Hence without the three handsets i cannot de-register and re-register the replacements. How do i reset the base and start all over? Just de-regitering the other handsets and then re-registering them does NOT work. The three defunct ones must be removed from the base. RAY

If you still have access to the old base you can de-register the handset by following a simple process. You will have to de-register all handsets registered to that base.

• Make sure that all handsets are out of the telephone

base and chargers before you begin deregistration.

• Press and hold /HANDSET LOCATOR on the telephone

base for about 10 seconds (until the IN USE light starts to
flash), then release the /HANDSET LOCATOR button.

• Immediately press /HANDSET LOCATOR while the

IN USE light is still flashing. (The light flashes for about
seven seconds. If the light stops flashing, start again with Step 1.)

• It takes up to 10 seconds to complete the deregistration process. Wait

Is the handset you are trying to register de-registered? if not it will not register to another base until it is.first de-registered.
To de-register the handset do the following-
With a charged battery in the handset Enter *331734# then without pause Press and Release the Menu Select Button. You will hear a Beep. Handset would then be De-registered..
Then place the handset on the Main Base cradle and follow the instruction that come up on the handset display.if the handset still does not register then most likely the base memory is full and will have to be re-set .
To re-reset the Base:- Remove any handset from the main base cradle. Then Press and Hold the Locator or find HS or handset Locator button until the IN USE light comes on and begin to flash then release it and immediately with out pause press and release it again. That will re-set the base memory. All your handset will then be de-registered and will to be re-registered. Place each handset to be re-registered on the Main Base cradle and follow the instructions on the the handset display and they will register.

If you want to replace a handset or re-assign the designated handset number of a registered handset, you must de-register all the handsets and then individually register each handset.
To de-register all handsets:
Press and hold
FIND HANDSET
on the telephone base for about 10
seconds (until the IN USE light on the telephone base turns on and starts to flash), then release FIND HANDSET
.
Press and release
FIND HANDSET again. (You must press FIND HANDSET
while the IN USE light is still flashing. The IN USE light flashes for
approximately seven seconds.)
All system handsets show
CONNECTING...
The de-registration process
takes about 10 seconds to complete. All handsets show
NOT REGISTERED
when the de-registration completes.
If de-registration fails, you might need to reset the telephone and try again.
To reset:
Pick up the registered handset and then press
/FLASH
.
Press
OFF/CLEAR
and place the handset back in the telephone base.
-OR-
Unplug the power from the telephone base, then plug it back in.
note:
You cannot de-register a handset if any system handset is in use.

After de-registering, proceed with registering process:
If the handset screen does not show LOW BATTERY
or HANDSET X, you will need to charge the handset for at least five minutes before registering to the telephone base.
To register a handset:
Place the unregistered handset in the telephone base or charger. If
PRESS FIND HS 4 SEC ON BASE
does not appear on the handset screen after a few seconds, remove the handset and place it in the telephone base or charger again.
On the telephone base, press and hold
FIND HANDSET
for about four seconds (until the red IN USE light on the telephone base turns on) and then release the button. The handset shows
PLEASE WAIT...
and it takes about 10 seconds to complete the registration. The handset shows
HANDSET X REGISTERED
(X represents the handset number assigned)
and you hear a beep when the registration completes.

The handset must be de-registered before it can be registered.
Try this:

1. To de-register the handset from another base:
When the orphaned handset says "Connecting..." or
"Out of Range..."
enter *331734 [menu]
and it will soon beep and display "Not registered"

2. To register the new handset to your base:
press the "Handset Locator" button on the base and hold
it until the "in use" light comes on ( ~ 4 seconds ),
then release the button and set the new handset into
the base phone cradle. After ~ 30 seconds it will beep
and display "Handset #" (next in sequence).

3: Note: the base handles a maximum of 12 handsets.

If your system was fully populated ( ie, a handset is
already # 12 ) you will have to clear all the handsets
from the base and re-register them all in sequence.
( it is the only way to 'rescue' the places occupied
by the lost handsets ).

To clear the base of all registrations:

1. Press and hold the the "Handset Locator" button
until the "in use" light lights and then starts to blink
( ~ 10 seconds ), release the button --
then press it again briefly while the "in use" light
is still blinking.

2. The base will beep and all handsets that were registered
will display "Not Registered"

3. Follow the instructions above for each handset
in turn to re-register them:
press "Handset Locator" ~ 4sec ( in-use light on ),
set handset into the base cradle, etc.

The manual is available from: www.manualslib.com
but does not fully describe these procedures.

Good luck !

Easy to do, even if the new handset is used & orphaned from
its original base...simply de-register it from the old base and
re-register it to your base.

1. To de-register the orphaned handset from the old base:
When the orphaned handset says "Connecting..." or "Out of..."
enter *331734 [menu]
and it will soon beep and display "Not registered"

2. To register the new handset to your base:
press the "Handset Locator" button on the base and hold
it until the "in use" light comes on ( ~ 4 seconds ),
then release the button and set the new handset into
the base phone cradle. After ~ 30 seconds it will beep
and display "Handset #" (next in sequence).

3: Note: the base handles a maximum of 12 handsets.

If your system was fully populated ( ie, a handset is
already # 12 ) you will have to clear all the handsets
from the base and re-register them all in sequence.
( it is the only way to 'rescue' the places occupied
by the lost handsets ).

To clear the base of all registrations:

1. Press and hold the the "Handset Locator" button
until the "in use" light lights and then starts to blink
( ~ 10 seconds ), release the button --
then press it again briefly while the "in use" light
is still blinking.

2. The base will beep and all handsets that were registered
will display "Not Registered"

3. Follow the instructions above for each handset
in turn to re-register them:
press "Handset Locator" ~ 4sec ( in-use light on ),
set handset into the base cradle, etc.

The manual is available from: www.manualslib.com
but does not fully describe these procedures.

Good luck !

The errant handsets must be de-registered from their
original base and then registered to your base.

NOTE: the CS6649 handles a maximum of only five
handsets. If you have a handset displaying
"Handset #5" then you have a 'fully populated system'
even if you actually have only one or two handsets.
In that case, you can clear each handset ( I ) then clear
the base of all registrations ( II ) before re-registering
each handset ( III ) up to the maximum of five.
=====================================
( I ). First, to de-register a handset ---

0. Start by taking off the battery compartment cover.

1. press [menu]
2. scroll up/down to "Settings"
3. enter * 7 8 9 0 #
4. scroll down to "next page", press [select]
5. scroll down to "Register Clear?", press [select]
6. display asks "Confirm?" or "Register Clear??",
press [select]
7. display reads "Ok" and chirps, press [ off ]

8. UNPLUG THE HANDSET BATTERY
(this is why the cover was off)

9. Wait ~30 seconds, re-connect the battery &
replace the cover

10. display reads "Not Registered"
===============================

( II.) To clear the base of all handset registrations
( if needed, else skip ahead to ( III ). )

1. press [Find Handset] on the base and hold
past ~4 sec when the "In Use" lamp lights, at
about 10 secs the "In Use" lamp will begin to
blink. 2. release the [Find Handset] button momentarily,
then briefly press it again. After a moment,
all handsets that were registered to the base
(if any) will display "Not Registered" and be
ready for fresh registration ===============================

( III.) To register each handset to the base:

1. press [Find Handset] on the base and hold for
~4 sec until the "In Use" lamp lights.
2. press # on the handset and set the handset into
the handset cradle on the base
3. within 30 seconds or so, the handset will either
chirp and display "Handset Registered", then
"Handset #x" or it will say "Registration Failed".

NOTE: the battery must be well charged prior to the
registration process, a weak battery may cause a
"Registration Failed". Charge the battery for a
few hours and try the registration ( III ) again.

===============================
Good luck !!

Please use the below link to assist you with handset registration.

http://service.us.panasonic.com/OPERMANPDF/KXTG5621S.PDF#page=35

*331734#Menu Select on the handset should de-register that handset from the old base, then you can register it to the base as per the manual (put it in the base and hold down the handset locator button for 4 seconds)

To de-register HANDSET #1:

1) Grab any working handset which is registered to your base (so HANDSET #2 or #3 in your case)

2) Press and hold the "END" + "#" key for 5+ seconds (wait for it to beep)

3) Choose the "Deregister HS" menu option

4) Pick HANDSET #1 as the handset ot de-register (since that's the "phantom" registered handset)

5) Once de-registered, you can de-register handsets #2 and #3 directly from each handset's "normal" menu interface (i.e. press "Menu", choose "Deregistration")

6) Thereafter, if you re-register your handset, they should start at HANDSET #1, then #2, and so on.

One has to completely deregister all handset by pressing end and # keys together till complete de registration is shown on handset screen. if the de registration is not done as above stated method the hand set will not register will show connecting on hand set screen.