An improved data communication system in which a block polling of a plurality of terminal blocks is first carried out, thereafter, a terminal polling of terminals in the terminal block(s) from which a response to the block polling has been issued is carried out. The data communication system includes...http://www.google.fr/patents/US5010329?utm_source=gb-gplus-shareBrevet US5010329 - Block polling data communication system having optimum block determination means
Block polling data communication system having optimum block determination means
