A modular termination system includes one or more first terminal block modules aligned side by side and second terminal block modules spaced vertically below the first modules. Jumper routing modules are interposed between the first terminal block modules and second terminal block modules and between...http://www.google.es/patents/US4160880?utm_source=gb-gplus-sharePatente US4160880 - Modular termination system for communication lines
Modular termination system for communication lines
