Tech Help, Panasonic KX-TDA50G 

Panasonic KX-TDA50/50G basic installation & programming

WARNING: Use proper surge protection for both AC power and phone lines.

See detailed instructions in the installation manual.

Basic sequence:

  1. Remove the front cover and open the top.

  2. Insert the SD card.

  3. Plug in the power cord and turn on power switch.

  4. Initialize the system.

  5. Plug a "system" phone into one of the bottom jacks to make sure the system works. You should have intercom dial tone, lights and a display.

  6. Unplug the power cord.

  7. Install optional circuit modules.

  8. Connect wires for phones, Central Office lines, Voice Processor, door intercom speakers, paging, music-on-hold, etc.

  9. Plug phones into jacks.

  10. Plug in Voice Processor, if any.

  11. Plug in the power cord and turn on power switch.

  12. Initialize the system again.

  13. Install maintenance console on your PC. Make sure you install the USB drivers that come with the maintenance console. Make sure you know where the drivers are being installed, such as on the desktop.

  14. Connect the KX-TDA50 to your PC with a USB cable.

  15. Use the maintenance console to obtain the ROM number.

  16. Email the ROM number to us and we will then email you the "electronic key" file that is necessary for programming and activating additional circuit modules.

  17. Program the system.

  18. Test.

  19. If it works, shake your own hand and have a beer to celebrate.

KX-TDA50G circuit card locations

Do you need a second power supply for a Panasonic KX-TDA50G?

You must connect an additional AC power supply in any of the following conditions:

• A total of more than 4 APTs, DPTs (except KX-DT300/KX-T7600 series), and DSS consoles (except KX-DT300/KX-T7600 series) are connected.
• More than 4 Cell Sites are connected.
• An MEC (Memory Expansion Card) is required to support a configuration with a total MEC figure exceeding 28.

Panasonic KX-TDA50G connections

SD card warning


Doing so may cause the system to fail to start properly when you try to restart.

Installing circuit cards in a Panasonic KX-TDA50G

(1) Circuit modules ("cards") are available to provide capacity for additional lines or phones, and for features. They are made in different physical sizes, generally with either four or eight jacks. Open the top of the KX-TDA50 cabinet and find the locations where you will install the modules, and pop out the blank plastic filler plates from the front panel. You will probably need a wire cutter ("dikes') or a knife. Be careful.

(2) There are three sections for installing the modules. The left section is for special feature modules, such as door intercom, echo cancellation, and Caller Id for single-line phones.

(3) The center section is for four-port cards of various types. The KX-TDA50G comes with two cards pre-installed. The one at the bottom is for four phones or accessories, such as a voice procesor system. The module above it is for four analog phone company Central Office lines. There are positions above that module for two more modules. Modules are installed by attaching them to the module below with screw-on posts, as well as electrical connectors. The jacks fit into the openings in the front panel.

(4) The right-hand section of the KX-TDA50G has spaces for up to three eight-port modules of various types.

(5) The sequence of modules in each "stack" does not matter.

(6) Module installation should be done with the power cord unplugged.

(7) After the modules are installed, close up the cabinet. Plug in the power cord, make sure the SD card is installed, turn on the power and initialize the system so it recognizes which cards you have installed.

(8) At the lower right of the cabinet, below the section for the eight-port modules, is a slide switch. Move it to "INITIALIZE." Use a paper clip to press the recessed "RESET" button. The green "run" light on the cabinet door should flash. Then move the switch to "NORMAL." After a few minutes, the "run" light should be steady.

Making your KX-TDA50G phone system ALIVE

The Panasonic KX-TDA50G is shipped with four live phone extension ports, and four live CO line ports. To use add-on circuit modules, your system must be "turned on" with an activation key from Panasonic.


To use add-on circuit cards, your system must be "turned on" with an activation key from Panasonic.

Here's how it works:

(1) We will supply you with Windows programming software ("maintenance console"). You will install the console software on a PC. (Make sure you install the right USB driver for your version of Windows. An icon should appear on your desktop.) You'll connect to your phone system with a USB cable and use the console to get the ROM number of your system. Make a note of the number and then email that number to us. We require TEXT, not a PDF or a screen shot.

(2) We will register your system with Panasonic and get an "electronic key" -- a small file to activate your system.

(3) We'll email that file to you. You save it in your hard drive, and then use the maintenance console to upload it into your phone system. You'll select UTILTY, and then "file transfer from PC to PBX" and select the file that you saved.

(4) After the file transfer, you shut the KX-TDA power off for a few seconds, and then turn it back on.

(5) When you see a solid green light, IT'S ALIVE!

Photo from Mel Brooks's "Young Frankenstein," starring Gene Wilder, Madeline Kahn, Marty Fledman, Peter Boyle (1974).

Panasonic KX-TDA50G

startup sequence


• The SD Memory Card must be inserted in the SD Memory Card slot of the main board before startup.

• Before touching the System Initialize Switch, discharge static electricity by touching ground or wearing a grounding strap.

• Once you have started the system and if you unplug the system, do NOT perform the following procedures to start the Hybrid IP-PBX again. Otherwise, your programmed data is cleared. To restart use the process in the box below this one.

• The system will continue to be powered even if the power switch is turned "OFF".

• The power supply cord is used as the main disconnect device. Ensure that the AC outlet is located near the equipment and is easily accessible.

System Initialization Procedure

1. Slide the System Initialize Switch to the "SYSTEM INITIALIZE" position.

2. Plug the DC connector of the AC adaptor into DC IN 1.

Note: The AC adaptor supplied with the KX-TDA50G must be connected to DC IN 1. If an AC adaptor is connected only to DC IN 2, the KX-TDA50G will not start. If you need to connect an additional AC adaptor, plug the DC connector of the additional AC adaptor into DC IN 2.

3. Plug the AC cord into the AC adaptor, and then plug the other end into an AC outlet.

4. Turn on the power switch. The RUN indicator will flash.

While the RUN indicator is flashing, slide the System Initialize Switch back to the "NORMAL" position.

Depending on the configuration, initialization takes about 1 min to 3 min. If successfully executed, the RUN indicator will stop flashing and stay lit. All data will be cleared, and the KX-TDA50G and all optional service cards (except for the IP-GW4 card) will be initialized to the default values. Display phones should show the time as 01:00. The data of the IP-GW4 card will not be initialized.

Resetting a Panasonic KX-TDA50G