In this use case, the Workbench PC can use VPN client software to make a temporary PPTP connection to the GPRS-equipped JACE (either for a platform connection, or to open its station). As in the previous use cases, the GPRS-equipped JACE can also initiate communications to the Supervisor for alarms and exporting histories (again, the Supervisor must have a public IP address).

As shown in Figure 3, the addition of the hub connecting the remote JACEs also allows for alarm “hopping” to the Supervisor.

For related details, see Connecting as a VPN client to a JACE with GPRS modem option in the Wyless as service provider appendix.