For minimally-invasive therapy for spinal canal stenosis, a therapeutic device capable of stationing an interspinous process spacer without the need of large skin incision or ligamentous tissue incision and also without the need of detaching of the paraspinal muscle from the spine. The device has a low profile for easy insertion beneath an appliance. A fluid operated valve actuator for each valve retains the valve in a closed state when the actuator is pressurized and opens the valve when the actuator is depressurized. Either the transmit data from the data source is coupled to the memory section in absence of a detected error or the data in the buffer is coupled to the memory section when an error has been detected and the data has been tagged with an indication that the transmit data is data allowed to be re-transmitted; selectively. This Abstract is provided for the sole purpose of complying with the Abstract requirement rules that allow a reader to quickly ascertain the subject matter of the disclosure contained herein. In one embodiment, an FTP based approach is disclosed which allows for significant optimization of download speeds providing as much a 100 times the download speed capability.