While the smallest component in the solution, the 400G pluggable optical transceiver is also one of the most critical. The QSFP56DD-FR4 form factor is about the size of a pack of gum but it is packed with technology. The transceiver supplied by InnoLight conforms with the QSFP-DD MSA and is capable of transporting 400G signals on up to 2 kilometers of single-mode fiber.“We are very honored to have been selected by AT&T for 400G interconnect technologies”, said Osa Mok, chief marketing officer of InnoLight. “There has been tremendous interest in our 400G solutions and we are so impressed with AT&T’s aggressive leadership in this space.”