Huawei GPBD 8-Port GPON Interface Card Huawei GPBD is an 8-port GPON OLT interface card that works with an optical network terminal (ONT) to provide GPON access service. GPBD can connect a maximum of 1024 GPON subscriptions. The card works with Huawei OLT devices - MA5608, MA5683 and MA5680. Main Features of H805GPBD Board Eight GPON SFP Ports Maximum Split Ratio 1:128 Class B+ and Class C+ Optical Modules Received Signal Strength Indicator (RSSI) Detection and Controlled Optical Transmission of Optical Module ONU-based Shaping Optical Performance Monitor (OPM) Auto Power Off in High Temperature Working Principle of H805GPBD