within the space employed by the entry and or exit doorway to obtain full protection from the system both entry and exit employ the one directional units the basic system is hardwired for a specific site and use as described for example in the specific examples presented below where desired a manually operating doorway systems maybe employed in conjunction with the present invention full computer control and capability to alter configurations by programming changes is envisioned as being within the scope of this disclosure with an independent low voltage source the present system can maintain security even when in the midst of power failure to the surrounding and protected areas for security and safety reasons low voltage is used to power the electronics and the sensitivity of the weapons detector can be set or varied by authorized personnel the digital key pad 10 switch 7 and the key pad of telephone transmitter 11 depicted in fig1 can be attached onto a wall of the door unit within the protected area this would permit manual activation from within the protected area alternatively activation and position of these devices could be from some area remote to the door units generally each one way door unit is about 5 6 feet.