This read-write enumeration reports and controls whether the CDMA modem's power-up lock feature is enabled(2) or disabled(3). An admin uses this to decide whether the modem requires an unlock step every time it powers on, a security versus convenience tradeoff similar to the PIN security setting but specifically tied to the power-up sequence. For example, disabling this on a remote unmanned site avoids the modem getting stuck waiting for an unlock action after every power interruption.