A method and apparatus for writing a command to a communications unit of a meter, effecting the execution of the command, and reading the results of the execution includes an electrical metering device having metering means, register means and communications means. The write, indirect execute, and read...http://www.google.se/patents/US5448229?utm_source=gb-gplus-sharePatent US5448229 - Method and apparatus for communicating with a meter register
