Viking Panasonic doorphone station adaptor Interfaces with a Panasonic KX-TA62460 doorphone/door station card  Allows use of the following Viking entry phones: 
  E-10A Flush mount speaker phone
  E-20B Surface mount speaker phone
  E-30 Stainless steel speaker phone, E-40 Compact door entry phone
  E-50 Compact video door entry phone
 All Panasonic doorphone/door station card programming options and features may still be used Increased audio performance over Panasonic's doorphones