Abstract: An intermediate unicast network is provided for use in a multicast data network where the multicast network is a local server and a plurality of network hosts, which may be, for example, point-of-sale registers. The intermediate network includes a network device for receiving multicast data from the local server, encapsulating such data in a unicast data transfer frame, and transferring the unicast data to a plurality of dongles, each of which being associated with a corresponding network host. Each dongle is configured to decapsulate the unicast data received from the network appliance and to re-assemble the data into multicast data for transfer to the associated network host.

Abstract: An intermediate unicast network is provided for use in a multicast data network where the multicast network is a local server and a plurality of network hosts, which may be, for example, point-of-sale registers. The intermediate network includes a network device for receiving multicast data from the local server, encapsulating such data in a unicast data transfer frame, and transferring the unicast data to a plurality of dongles, each of which being associated with a corresponding network host. Each dongle is configured to decapsulate the unicast data received from the network appliance and to re-assemble the data into multicast data for transfer to the associated network host.

Abstract: An appliance for transmitting and receiving encrypted wireless network signals, preferably, in a 900 MHz band, includes a radio frequency module, coupled to a cryptographic module, which, in turn is coupled to an Ethernet interface module and a power-over-Ethernet splitter. The components are affixed to a thermally conductive substrate that is mounted to the floor of a chamber defined by a thermally conductive housing.

Abstract: A system for enabling a virtual private network over an unsecured network includes a local network coupled to an internet server configured with a firewall. Coupled to both is an appliance that includes a cryptographic module. A remote modem, for example, a cellular modem, is coupled to a counterpart appliance that includes a compatible cryptographic module. The two modules are keyed to be exclusively, mutually responsive to each other and enable the transmission of encrypted data between the local network and the remote modem. The appliance coupled to the remote modem may further be coupled to either of a remote computer device or a remote network.