It's the front-end I/O interconnect for high-speed data center and networking gear — the cage that houses the pluggable transceiver modules and manages the thermal load. The press-fit termination means it gets pressed into plated through-holes on the backplane or mid-plane board, no solder required, which keeps assembly clean and the signal path consistent.
EMI Shielding and Light Pipe — Not Just Trimmings
The cage carries EMI shielding as a built-in feature, which is essential at the data rates ZQSFP+ supports — the ganged 1x6 layout means six module bays side by side, and without the shielding, crosstalk between adjacent channels would eat into the signal margin. The light pipe is a molded-in feature that routes the module's link-status LED to the faceplate, so you get visual indication without a separate PCB-mounted LED. Both features are integrated into the cage assembly, saving board space and assembly steps.
Press-fit termination is the standard for high-reliability backplane connectors — no thermal cycle from wave or reflow solder, no solder-joint fatigue over the life of the system. That's the typical layout for a line card or switch faceplate where the cage sits at the panel edge and the PCB traces run inward.