The MPO-12 to 2 x MPO-4 APC (Female) OS2 cable is a single-mode, 4-channel-to-two 2-channel splitter fiber cable, which uses 8 active fibers to transmit light and 4 inactive fibers as strength members. The APC end has an 8-degree polished angle to deflect internal optical back reflections from entering the transceiver and distorting the signal quality.

Using two MPO-12 APC to 2 x MPO-4 APC breakout cables can link an 800G NVIDIA InfiniBand twin-port OSFP transceiver to four 400G NVIDIA InfiniBand OSFP/QSFP112 transceivers in data center high-speed fiber links. And, only two channels are activated when 400Gb/s transceivers are used with the 1:2 breakout cables, creating a 200Gb/s transceiver. Compared to purchasing and installing separate breakout cassettes, using MPO breakout cables is more cost-effective and lower-loss.