cmHSSIAdminState is a read-only enumeration reporting the administratively configured state of a HSSI port -- disabled, enabled, or shutdown. An administrator checks this to confirm a port's intended state matches its actual operational state (cmHSSIOperState), catching cases where a port was left administratively shut down. For example, if a HSSI circuit isn't passing traffic and cmHSSIAdminState shows shutdown(3), the operator knows the port needs to be administratively re-enabled rather than investigating a physical fault.