Display shows 4 missed calls

It's completely normal. The phone is simply saying it detected an incoming call that it didn't answer. Try setting your other answering machine to pick up immediately, perhaps that will stop your phone from "seeing" an incoming call.

Lets see if I can get my hands on a manual. one moment

You can view a copy of the user guide for your GE 28871FE3 at this link. You may review the manual to assist you with resetting your answering machine and any other questions you may have about its operation.
http://tiny.cc/FixYa591

- This manual is in PDF format. (It may take a minute to load when you click on the link.) If you need a PDF reader, you can download Adobe Reader for free:
http://tiny.cc/sIAIh


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Cause:-
Call logging is not enabled for the Message list.
Ensure call logging is enabled from the Phone application Options menu.
1) From the Home screen, open the Phone application.
2) Display the menu and select Options.
3) Select Call Logging.
4) In the Show these call log types in message list field, select the type of call log to be displayed in the messages list.
5) Display the menu and select Save.
I hope I was able to help you.

refer to the manual

To Do, Alarm and Incoming Messages give a single audio alert but to not display on the screen. The Snooze function does not work although it is selected. Missed calls do not display

Pick a spare button and label it CALL LOG. Now press PROG that button and dial 54 STORE. Ooh, it should light up. Now press it and your display will show 3 of the 4 lines of CID info from the calls to your set. The navigator button will show the rest, just keep pressing the UP, DOWN, LEFT, RIGHT buttons. When you run out of items to display, the light and INCOMING CALL display will go out.

If you press 54 and the 3 digit number of your incoming call group (maybe 601 by default) it will follow the incoming calls to the entire call group.



Carl

A Panasonic TDx system has 2 types of call logs, one personal for the set, and one for the ICD group.

Pick a spare button, press PROG, the button, and dial 54 STORE.

If you had incoming: 00x on your display, that button will light and you can now press it to see who called. Your Navigator UP/DONW key will step you forward or backward through the log. The LEFT/RIGHT key will display the 4 lines of the display if you're not using a 7636 phone.

If you want to see incoming calls to a particular ICD group, pick another button, and dial 54 plus the ICD group number. For example, I used 100 as my ICD group (now 600 by default). I have 2 buttons, one logs my extension calls, one displays the system calls.

Carl

save the contacts in the phone memory

The red blinking light is an 'event' light, it does not necessarily mean a message is waiting for you, it will also start to flash if you have a missed call.
click 'up' on the round button to show the missed calls list and it will stop flashing, at least it does on mine!