Abstract: A system for controllably actuating a lock mechanism has a lock actuator control unit arranged to receive a key and to communicate with a programmable key control unit contained within the key. The lock actuator control unit contains a power supply for supplying power to the key control unit, so that a transfer of communication signals between the key control unit and the lock actuator control unit may take place. A key is configured to engage the lock actuator control unit, the key containing a programmable key control unit which stores information representative of the ability of the key to cause the lock actuator control unit to actuate the lock mechanism and which receives power for its operation from the lock actuator unit.

Abstract: A control and switching device which is installed at a customer's computer (local) site and which links a remote terminal by modems over telephone lines to the system console, the TTO/TTI port and the ALM/IAC port of the host computer, and to a user terminal for remote diagnosis of hardware and software problems is disclosed. The device, which is coupled by separate lines to the modem at the local site, the system console, the user terminal the TTO/TTI port and the ALM/IAC port of the host computer includes a microprocessor a memory, various logic and control circuits and a three position keyswitch. The keyswitch provides a first level of security and limits the type of access allowed by a remote caller. When the switch is in a first position, the caller has no access to the host system. When the switch is in a second position, the remote caller can connect to the ALM/IAC port or communicate with the user terminal but cannot change configuration data.