pass thru signal 408 can be transmitted to from the rf modem 310 the second regulated power signal 409 can be used to power a control signal interface board 315 the control signal interface board can in turn provide regulated power to one or more peripheral devices including the rf modem 310 the second power signal 409 can include a voltage of 12 vdc however the invention is not limited in this regard the rf modem 310 can convert a digital signal into a form suitable for transmission over an analog communications link for example a baseband digital signal can be modulated onto an rf signal for transmission in particular the rf modem 310 can communicate data with a centralized server 405 typical rf bandwidth that can be used to transmit data is about 5 1000 mhz but the invention is not limited in this regard the rf modem 310 can be operatively connected to control signal interface board 315 for example data and power can be communicated between rf modem 310 and control signal interface board 315 via an electrical connector for example such an electrical connector can include but is not limited to a db 9 serial electrical connector cable however the invention is not limited in this regard and other types of data connection cables can be used to transfer data the control signal interface board 315 can include one or more peripheral device interfaces for communicating with one or more.