1. The front plugboard comprises a control module and a rear plugboard power supply module connected with the control module.

2. It can satisfy the requirement of digital plugboard test and carry out the plugboards test to chip level. Thus it has wide application potential.

3. The system comprises the front plugboard and the rear plugboard connected with the front plugboard.

4. This is a major shortcut since the plugboard settings form a huge portion of the key space.

5. It is realized that the cupola being totally closed by using the synchronous motor, dual rack plugboard, location detector, charging device and the system of sucking gas and eliminating dust.

6. The program iterates through all possible machine settings except the plugboard settings.

7. The embodiment of the invention discloses a method, a system and a front plugboard supporting hot plug, which belong to the communication technical field.

8. Here the changes lie in constantly trying out new wirings of the Enigma plugboard.