If your Cell2Jack's RED LED is solid on but get a warning message said "...phone is not connected", do a Factory Reset. or You like to repair cell2jack to a new cell phone. Enter 82#83# from your home phone keypad while off hook. The RED LED will turn orange and flash few sec then turn off.
After factory Reset done, reboot your Cell2Jack and re-pair (re-setup) Cell2Jack to your Cell Phone