SOURCE: change the ring tone of Panasonic KX-T7730
I think it can be done. Just exchange the phone for a 7633 and change out the TA for a TDA-50.
Piece of cake.
Carl
SOURCE: panasonic kx-t7330 suddenly cannot use intercom and phone calls
I'm guessing the phone is 8 years old and you spilled something into the keystrip.
Start by unplugging it to see if it resets. Then, look for a mechanical failure (sticky buttons, broken buttons, etc.). Some alcohol and a Q-Tip will clean the buttons, or carefully take the phone apart and wash out the housing.
Last, but not least, any of the new 7730/31/35/36 phones will replace that set.
Carl
SOURCE: I HAVE A PANASONIC PHONE MODEL KX-TGA641C AND ALL
Remove all power (wall and batteries). Ensure that the phone line is active and properly connected. Did they used to work? If so, check line conditions. If not, return for exchange.
SOURCE: How to change the time setting for the Panasonic KX-T7633 phone?
If you are using this phone on a Panasonic KX-TDA 30/100/200/600 system. From the Switcboard / Main telephone or Managers phone with the handset on the cradle/hook press Program * * or Program * # followed by the system password ( default is 1234). Now press 000 and then ENTER. Enter the last 2 digits of the year and then select the month with either SEL+ or AUTO ANS / MUTE. Now scroll right with the right arrow key and change the date. Now press the NEXT button on the screen and the time will appear. Set the time. Press AUTO DIAL / STORE to save your changes. Lift the handset and put it down to exit program mode.
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