Important: Read this First
HSM failure. If an Expressway is configured to use HSM and the HSM subsequently fails, all services that require encryption will become unavailable. This includes MRA, calls, web access, and so on.
Factory reset. If the HSM is permanently unavailable for any reason, you will need to do a factory reset for the Expressway and then configure a new HSM on the Expressway. A factory reset reinstalls the software image and resets the Expressway configuration to the default, functional minimum (see the Expressway Administrator Guide for instructions about doing a reset.)