The Panasonic KXTDA0103 L‎-Type Power Supply is compatible with KX‎-TDA200‎,‎ KX‎-TDA600‎,‎ KX‎-TDE200 or KX‎-TDE600 Phone Systems‎.‎ It is a large plug‎-in system power supply for use in the main cabinet of the KX‎-TDA/TDE200 as well as the main cabinet and expansion cabinets ‎(‎KX‎-TDE620 or KX‎-TDA620‎)‎ of the KX‎-TDA/TDE600 Telephone Systems‎.‎ The TDA/TDE200 and TDA/TDE600 Systems will not work without a power supply‎.‎KX‎-TDA/KX‎-TDE600 Systems also require a BUS‎-M and BUS‎-ME when expanding to additional cabinets‎.‎

It is necessary to select the proper power supply for the system in accordance with the type and number of extensions that are connected to the system‎.‎ There are 3 power supply options‎;‎ S = Small‎,‎ M = Medium and L = Large‎.‎ To calculate the size of the power supply required for your application‎,‎ you must determine the type of telephone extensions you plan to use‎.‎ Then using the telephone equipment power factor “B” portion of the chart below‎,‎ calculate the point value for each and add up all the points‎.‎ Using the Power Supply Maximum Power Factor “A” portion of the chart below‎,‎ match up the points calculated with the correct power supply‎.‎ The power supply value must be greater than the total points calculated for the telephone equipment‎.‎ ‎(‎When in doubt use the larger power supply‎.‎‎)‎