Uniden TRU9488 Phone - Answered Questions & Fixed issues

You may download a copy of the manual here.

Dial 1 then the country code and then the number or just dial "0" for the operator and have them do it for you.

then increase the ringing time to continuos ringimg in ringing tone settings

What is the model # of your handset. It must be tcx 900 or tcx 905 to be compatible with the tru 9488. Good luck! :)

OU might need to deregister the hand set first by holding down the red end (hang up key) and keep it down while holding the # key. If deregister wont work use base unavailable and yes, you are sure twice.

List the handset numbers of those working handsets
Using a WORKING handset follow these directions
Resetting Handsets
If you want to register the handset to a different base or
replace a handset with another one, you must first clear the
registration information from the base and the handset.
1. Press and hold [ ] and [#] for
at least 5 seconds, until the
SYSTEM RESET menu
appears.
2. Select the DEREGISTER HS
submenu. WHICH HANDSET?
appears in the display.
3. Move the cursor to select the handset ID to be de-registered
from the list, and then press the OK soft key. DEREGISTER HS
appears. CHOSE A NUMBER THAT IS NOT ONE OF YOUR WORKING HANDSETS
4. Move the cursor to select YES, and then press the OK soft key.
When ARE YOU SURE? appears, select YES. You will hear a
confirmation tone.
PUT THE HANDSET IN THE BASE CHARGER AND IT SHOULD REGISTER

Hope This Helps - It worked for me

YOU might need to deregister the hand set first by holding down the red end (hang up key) and keep it down while holding the # key. If deregister wont work use base unavailable and yes, you are sure twice.

List the handset numbers of those working handsets
Using a WORKING handset follow these directions
Resetting Handsets
If you want to register the handset to a different base or
replace a handset with another one, you must first clear the
registration information from the base and the handset.
1. Press and hold [ ] and [#] for
at least 5 seconds, until the
SYSTEM RESET menu
appears.
2. Select the DEREGISTER HS
submenu. WHICH HANDSET?
appears in the display.
3. Move the cursor to select the handset ID to be de-registered
from the list, and then press the OK soft key. DEREGISTER HS
appears. CHOSE A NUMBER THAT IS NOT ONE OF YOUR WORKING HANDSETS
4. Move the cursor to select YES, and then press the OK soft key.
When ARE YOU SURE? appears, select YES. You will hear a
confirmation tone.
PUT THE HANDSET IN THE BASE CHARGER AND IT SHOULD REGISTER

Hope This Helps - It worked for me

Unplugged all telephones but one and still had trouble so I called Verizon. They discovered it was an incoming line that was malfunctioning. However, the Uniden telephone system still does not work and since it is still under warranty I will contact them.
To continue the solution of my telephone problem - It was discovered that the incoming line was indis repair. After it was repaired, I again set up my Uniden telephone system. It works with no problem. The word "searching"still appears on the face of the units, but it can be overcome with normal activity on the units.

Remotely Operating Your Answering Machine

Call your telephone number and wait for the answering machine to answer. If the answering machine is off, it will answer after about 10 rings and series of beeping sounds.
During the greeting message (or a series of beeps when the answering machine is off), press [0] and enter your PIN code within 2 seconds (see "Setting a Security Code or Personal Identification Number (PIN)" on page 54).
The answering machine announces the current time and the number of messages stored in memory. You hear "To play incoming messages, press zero-two. For help, press one-zero." You will hear a beep.
Enter a remote command within 15 seconds, each command there after must be entered within 2 seconds.

I called Uniden about the same problem.  They say it is a code that means it is defective base unit.  I had purchased it within one year and they will gladly send me a new one.  I don't know if they will offer anything beyond the one year mark. 

They say it was a spike in the power lines that causes this error. 

Page 61 from the Base Unit, there is Delete All. From the handset you have to delete 1 at a time. With.the.phone.in.standby, .press.[ ].to. delete.all.messages..When.the.answering machine asks you to confirm, press [ ].delete again..All messages are. permanently.deleted. https://www.manualslib.com/manual/184807/Uniden-Tru9480-Series.html?page=61#manual ..

copy and paste https://www.uniden.info/download/index.cfm?s=DCT646 https://www.uniden.info/download/ompdf/DCT648om.pdf https://www.uniden.info/download/ompdf/DCT646om.pdf

Uniden Support - Downloads and Manuals

uniden.info https://www.uniden.info > download Uniden Support - Downloads and Manuals. Missing: 8116-2 ‎' Must include: 8116-2

• Series OWNER'S MANUAL - uniden.info

  https://www.uniden.info > download > ompdf PDF Uniden 2.4GHz cordless phones are designed and engineered to exacting standards ... NOTE: Illustrations in this manual are used for explanation purposes.

Unfortunately, handsets are not universal for Uniden cordless phone systems. The accessory handset for the EZX290 is compatible with the DECT1500, 2000, 2100, 300 and 2900 DECT 6.0 phone systems. The accessory handset for the D1660 is here: https://www.amazon.com/Uniden-D1660-DECT6-0-Cordless-Handset/dp/B004NEUIY2 . I wish that I had better news for you. Unfortunately, the two systems (EZX290 and D1660) don't use same handshake codes. Cindy Wells

The Uniden D-1680 system can have up to 12 handsets registered to the base. (The phone system was sold in bundles with 0 to 11 accessory handsets.) However, this cordless phone system has been discontinued. I can only find used DCX160 handsets (the compatible accessory handset) on Amazon and E-bay. I hope this helps. Cindy Wells

Yes, you can join an older and a newer version of Uniden Dect 6.0 cordless phones to work off the same base. Here are the steps to sync them:

1. Disconnect the power cord from the base of both phones.
2. Take the battery out of each handset.
3. Wait for a few minutes.
4. Reconnect the power cord to the base of the newer version phone and insert its battery.
5. Wait for the phone to register on the base, which should take a few seconds.
6. Once the newer phone has registered, repeat steps 4 and 5 with the older version phone.
7. The older version phone should now register on the same base.
8. Test the phones to make sure they are working properly.

If for some reason the phones do not register on the same base, refer to the instruction manual that came with the newer version phone for further troubleshooting steps.

It may be that the message is held by the Telco. Phone the supplier and ask. You dial in with a special number and PIN.

Question edited for clarity. Question moved from Computers. Help in the link https://www.google.com/search?q=Uniden+Phone.+How+to+unblock+a+number ..

Talk to your telephone service provider. There will be a fee. Cindy Wells (Uniden landline phones can make or receive calls; some models have a answering system. Most current models can even check if you have messages on the telephone provider's voice mail. (Sometimes, they'll give spurious voice mail information.) However, they don't have any built-in way of seeing any data (another call) from the telephone provider when the phone is in use.)

Looks like $65