NEMA published ANSI C12.22-2012, Protocol Specification for Interfacing to Data Communication Networks, which proves useful for smart meter and smart grid communications by allowing transport of table data over any reliable networking communications system. Last published in 2008 as ANSI C12.22-2008, this standard has been revised to extend concepts of ANSI C12.18/MC12.18/IEEE 1701; ANSI C12.21/MC12.18/IEEE 1702; and ANSI C12.19/MC12.19/IEEE 1377.