SFF-8024 — code tables

SFF-8024 is the shared registry of coded values that other specifications point to. It does not describe a module's memory layout; instead it assigns the meaning of many one-byte codes used across SFF-8472, SFF-8636 and CMIS.

What it defines

• Identifier values — the byte that says what kind of module this is (SFP, QSFP+,

QSFP-DD, OSFP and so on).

• Connector types — LC, MPO, RJ45 and the rest.
• Encoding and cable technology codes.
• Host and media interface codes — the electrical and optical interfaces a module supports.

Why a shared table

Because these codes live in one place, every specification and every tool interprets them the same way. When a new module type or connector is introduced, it is registered here once and the other specs reference it.

In CodingBox

CodingBox uses the SFF-8024 tables to turn raw bytes into readable names — the module identifier, its connector and its interfaces. That is why the EEPROM editor can label a byte's field and the Check transceiver screen can name the connector and form factor.