When someone calls my message is heard as if 2 people are talking at once.

You have unheard messages on the voicemail system provided by your telephone company. This system records messages when someone calls while you're already on the phone. Please contact your telephone company for instructions on accessing their voicemail system.

Download a copy of the manual here. Record you message following the instructions on page 56. Listen to your messages following the instructions on page 58.

As for the blinking light, you have unheard messages on the voicemail system provided by your telephone company. This system records messages when someone calls while you're already on the phone. Please contact your telephone company for instructions on accessing their voicemail system.

Making Use of the Voice Mail Service
From your own extension
VPS* Extension No.
Mailbox
· If you have no password, you can skip the last step.
* VPS: Voice Processing System
From someone else's extension
VPS Extension No.
Mailbox No.
Mailbox Password*1 +
· If you have no password, you can skip the last step.
Listening to a Message
Password*1
+
KX-TVA series
Listen to Message
Deliver Message
Mailbox Management
Automated Attendant
Message Notification
Other Features
End Call
KX-TVS series
Listen to Message
Deliver Message
Check Mailbox Distribution
Automated Attendant
Mailbox Management
Other Features
End Call
VPS Extension No.
Leaving a Message
From your own extension
Mailbox Password*1 +
From someone else's extension
Mailbox No.
Mailbox Password*1 +
· If you have no password, you can skip the last step.
Enter the desired mailbox no.
To send the message immediately
Leave a message
(KX-TVA series)
(KX-TVS series)
Follow the guidance
To set the delivery time

You can actually call your voice mail from a home phone and not use minutes. Any time you use your cell phone, whether someone calls you, or you call them, it counts as minutes to your plan. You should be able to see the actual voicemail number in your phone book, and be able to call it on a home phone and listen/delete them at your leisure that way. Your phone also rounds up on minutes. So if you talk to someone for 9 minutes and five seconds, it'll count as ten minutes to your plan.

That usually has to do with the cell phone provider's voice mail, not the cell phone.
Call your voice mail. Instead of listening to messages listen to all the menus.
You'll want something like "setup" "record new outgoing message" or things like that. Usually you can listen and choose to save or do a new recording. You might need to press star (*) or pound (#) buttons to save or cancel the recordings - or maybe numbers 1 or 2.

LOL! Now I know what you're talking about. You must have a Panasonic TA-824 system with BV (the built in voicemail system).

If you have a Features Manual, look at page 15. Here's a copy on my website http://public.carl.airpost.net/Pana/TA-824/400_TA_FM_07-04.pdf

Dialing 725 will get you to the BV system. Someone has filled up the message box. All those calls you get after hours will fill up the common mailbox, so someone needs to clean that box out on a hourly or daily basis. Search the file for 725 and you'll get the table that gives you instructions. The Operating Manual (OM) has specific user instructions, starting with page 36. It involves a 725 2 sequence with 3 pause 3 erasing messages. Read the section carefully, because if you mess up you will erase ALL messages.

Here's the link to the OM if you don't have it. http://public.carl.airpost.net/Pana/TA-824/200_TA_OM_07-04%5B1%5D.pdf

When you get to 5 minutes remaining in the BV system, you should have heard a funny dial tone. I'm not exactly sure if it would have been on all phones, or just the operator phone and the phone with a full mailbox. We have never installed one on a TA system in 5 years :-)

Carl

While you are away from your home or
office, you can use a touch-tone phone,
or a pulse (rotary) phone with a pocket
tone dialer (available through your local
RadioShack store) to enter your PIN and
do any of the following:
• set the phone to answer or not
answer calls
• listen to your messages
• record a new outgoing message
• erase messages
• monitor the room where the phone
is located
Notes:
• You cannot remotely operate the
phone using its handset or another
telephone on the same line as the
phone.
• You can also listen to the message
recorded on Line 2 by making a call
to Line 1’s number (or vice versa).
USING THE TOLL-SAVER
If RING TIME is set to TS (toll-saver),
(see “Setting the Number of Rings” on
Page 15), the phone answers after three
rings if you have new messages (ones
you have not listened to). If there are no
new messages, the phone answers after
five rings. This gives you time to hang
up before the phone answers so you
can avoid unnecessary long-distance
charges.
Note: Toll-saver works only on the line
you called. If Line 1 has no new messages,
but Line 2 has one, the telephone
answers after five rings when you
call Line 1.
USING REMOTE
COMMANDS
Follow these steps to operate the phone
from a remote location.
Note: If you wait more than 15 seconds
between keypresses, the phone sounds
a long beep and hangs up.
1. Dial your phone number and wait for
the phone to answer.
2. If the phone is not set to answer
calls, it answers after about 10 rings
and sounds a series of beeps.
3. When the outgoing message begins
(or the phone sounds a series of
beeps), press #, then enter your PIN
within 2 seconds.
If the PIN is correct, the phone announces
the day and time, then it announces
the number of new and old messages.
The phone plays all new messages,
then beeps about every two seconds to
let you know it is ready to accept remote
commands.
Notes:
• If the phone does not respond, try
entering your PIN again. If you enter
an incorrect PIN three times, the
phone beeps and hangs up.
Remote Operation 27
• When the phone is operating from a remote location, it stops all answering functions
and rC appears on the display on the base. The phone resumes answering
functions when it is no longer in remote operation, if you have not turned it off.
• The remote playback of incoming messages is limited to 4 minutes. If you have
more messages after 4 minutes have passed, you must press # 2 again to listen
to the rest of the messages.
• When using remote operation, you can only delete the current message during
playback. You cannot delete all the messages stored at one time.
The following table shows the remote commands you can use.
Note: Remote operation stops when someone picks up the handset and presses either
LINE 1 or LINE 2 (whichever is flashing), or any phone on the same phone line.
Remote Commands
Press #
then (within
2 seconds:
Function
1 Repeat current message during playback.
2 Play messages.
3 Skip current message during playback.
4 Delete current message during playback.
5 Stop playback, recording, and room monitoring.
6 Set the phone to answer or not answer calls.
7 Record or stop recording a new outgoing message.
8 Play the outgoing message.
9 Switch to the other line (Line 1 or Line 2).
0 Monitor the room where the phone is located for 15 seconds

HI,
Pl. log on to www.panasonic.com & click on support , enter the model no. You can download the User manual.

wow, no one has posted a response for this poor sap. I don't know what to do, but someone should at least post some insight!
Personally, I think it may be a power issue, as possibly the current going to the phone is not stable, so it is interfering with the machine's abilities to listen for someone else picking up on the other end.

there is problem inside ur phone. the speaker which gives sound to listen in caller's voice that has spoiled. take it to technician it need to be replaced