I'm not sure what you're looking for. Are you looking for information on ZTE ZXA10 GTGH K00 C++ C320 C350 C300 16-port GPON OLT interface board with C++ module? If so, you can check out this link 1 which provides more information about the product.
Product Description
New Version GTGHK B+ 16 Port Card Board GPON OLT ZTE GTGH Card for C300 OLT C320 with 16 SFP Modules B+
GTGHG is old version compatible with all ZTE OLT C320 C300
GTGHK is new version compatible with ZTE OLT C320 C300 in the year of 2017 or later