STANAG4575 interface defines the electrical and command protocol (level 1), the protocol is the file structure (level 2), and the physical interface defined by the connector, the pin connections, and power provisions (level 3).
The three layers support a STANAG 4575 compliant Removable Memory Module (RMM), used as a data memory recorder.

Electrical and Command Protocol layer defines the signaling and protocol requirements for the command and data communications interface to the Advanced Data Storage Interface. The interface is generally based upon Fibre Channel interface standards, using an Arbitrated Loop topology and SCSI Upper Level Protocol (ULP).

The protocol interface shall conform to the requirements of the Fibre Channel Private Loop SCSI Direct Attach (FC-PLDA, ANSI/NCITS TR19-1998) interoperability

The interface shall comply with FC-PI and FC-FS, with configuration options as specified below.

The STANAG interface supports two different connector implementations. STANAG compliant ground stations shall have mating connectors for both connector options. A 50-pin D-sub military connector (MIL-DTL-24308) is provided for implementations with minimum space provisions. Two circular military connectors (MIL-DTL-38999) are specified for applications that require the environmental capabilities of this class of connector. The two connectors separate the data from the power provisions. The specified Data and Control Interface for both configurations of the download port shall be a Fibre Channel interface utilizing a twin-axial copper pair with a differential impedance of 150 ohms as per the Fibre Channel standard.