GL-G8604T is designed for chassis OLT device which provides 4 downlink 1000M PON ports, 2 uplink GE Combo ports,2 uplink 10GE port by GL-COM. The height is only 1U for easy installation and space saving. Each PON supports up to 128 terminals, the whole device supports up to 512 ONUs under full configuration. G8604T adopts advanced technology to support SLA and DBA to keep strong function on the Ethernet and QoS features. It is applied for commercial and grid network digital management to provide perfect, smart, strong, advanced, professional solutions for “automatic distribution” and “electricity information collection” in the implemented project for the national grid.