Can I connect a CL82409 handset to a CL82409 base system

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 !

This sounds like a registration problem, each 'old'
handset must be de-registered from its original
base and then registered to the 'new' base.

NOTE: the CS6229 handles a maximum of 5
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.

You will need to 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 !!

Yes. The'old' handset must be de-registered from its
original base and then registered to your base.

NOTE: the CS6229 handles a maximum of 5
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.

You will need to 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 !! --

According to the manual starting on page 52, you need to de-register all handsets then re-register the handsets one at a time. The manual covers both cordless model numbers so the handsets should be interchangeable. I have included a link where you can download the manual if you need it.

http://att.vtp-media.com/ecp/documents/product_Product/127/UserManual/1082/cl82209_manual_i3.pdf

The handset must be registered to the base unit if the system has multiple handset ability, the manual will tell how to register the handset. If the system is a two handset system then only two handsets can be registered.

Check the Battery on the Handset. remove the pwr frm the base unit n connect aft 30 sec. aft this if it still says the same msg, then the handset needs to be replaced.

If the other three handsets work ok then you have a defective handset.

To deregister ALL handsets:
Step 1: Press and hold FIND HANDSET on the main telephone base for 10 seconds.

Step 2: When the IN USE light starts to flash, release the FIND HANDSET button.

Step 3: Press and release FIND HANDSET again. The IN USE light will turn off and in a few seconds, all handsets will be de-registered.

Step 4: All handsets will show NOT REGISTERED.

To register a handset (register 1 handset at a time):
Step 1: Place the handset in the base unit or a charger that is connected to a power outlet. If PRESS FIND HNDST 4 SEC ON BASE does not appear on the screen after a few seconds, lift up handset and place in base or charger again.

Step 2: On the telephone base, press and hold FIND HANDSET for four seconds. Release FIND HANDSET once the IN USE light comes on.

After a while the handset will emit a series of tones, the newly registered handset will be assigned the lowest extension number not previously assigned to another system handset (1-4) when successfully registered. Repeat Steps 1 and 2 if the handset does not successfully register to the telephone base within two minutes.

REPEAT THE REGISTRATION PROCEDURE FOR EACH SYSTEM HANDSET.

Make sure the handsets are not receiving interference from other appliances, cell phones, etc.

IF deregistering does not work .. you will need to reset the entire system
Step 1: Disconnect the power to the telephone base.

Step 2: Disconnect the handset battery.

Step 3: Wait a few minutes and then reconnect the power to the telephone base.

Step 4: Reconnect the handset battery

Step 5: Wait about one minute for the handset to re-establish a link with the telephone base and then test the phone again.
You will need to set the time and date again after resetting the entire system.

SORRY TO BE REDUNDANT BUT DID YOU HAVE PHONE IN STAND BY AND NEAR BASE.
THEN PRESS PGM
THEN INTERCOM
THE SCREEN SHOULD SAY ENTER SYSTEM ID
ENTER THE 10 DIGITS SYSTEM ID ( THIS NUMBER IS ON A STICKER ON THE BOTTOM OF THE BASE PHONE)
THEN PRESS PGM.
MAKE SURE YOU ARE PUTTING THE CORRECT ID NUMBER IN THE PHONE
I HOPE THIS HELPS