What is the difference between Huawei XGPON and XGSPON board?

GPON, 1.25G upstream, 2.5G downstream

10GPON is evolution of GPON, it has two standards XGPON and XGSPON.

XG-PON, also called 10GPON or asymmetrical 10GPON, different down and up stream.

XGS-PON, symmetrical 10GPON, upstream and downstream rate are the same.

XG-PON down and upstream rate is Asymmetric, XGS-PON is Symmetric. Now there is only XG-PON service board like XGBD XGHD available in the market; XGS-PON boards is not popular used.

 Huawei MA5800 series XGPON and XGSPON briefcomparison