Communication interface conversion device

The utility model relates to a communication interface conversion device, including first interface, signal conversion module, transmission control module and an at least interface module, wherein, first interface is copied the equipment of reading with the outside and is connected, be used for the transmission with a communication signal who reads equipment matching is copied to the outside, the signal conversion module be used for carrying on the TTL signal with a interface transfer a communication signal's interconversion, the transmission control module is used for control the conversion of signal conversion module TTL signal transmission is to selecing the interface modul. Interface module includes the second interface of being connected with outside communication interface, interface module is used for going on the transmission of transmission control module the TTL signal with the 2nd communication signal's that outside communication interface matees interconversion, and pass through the 2nd interface