GRETACODER 518 Encryption Device

Made by Gretag, this encryption/decryption  device was used between a modem and a terminal for almost all synchronous data communications at data rates up to 20 bits per second. Encryption and decryption  was done automatically via a microprocessor.

Front view of unit lying atop of its protective styrofoam.
Rear view of unit. The clear signal connector is on the left; the ciphered signal on the right. A V.24 interface is employed.
The exact purpose of the plug is not known at this time,. Perhaps it is an enabling key of some type. 
All photos in this table via  E-bay. 

References and Credits:

1) E-bay copy

 Back To Menu Page

Feb 26/12