The TK3723 is a dual IEEE 802.3ah standard Ethernet PON (EPON) MAC controller for Optical Line Terminals (OLT). It incorporates two EPON MACs for WAN connectivity to a passive point-to-multipoint (PON) optical fiber network, and two IEEE 802.3z Gigabit Ethernet MACs as a Central Office Network Interface. Each TK3723 EPON channel provides 2.5 Gbps and 1.25 Gbps downstream rate options while maintaining a 1.25 Gbps upstream rate.The TK3723 provides service policy, security and authentication management to meet the requirements for carrier applications. An embedded ARM9 processor provides a management system for self management, autodiscovery, and bandwidth provisioning. The TK3723 can be used in either a Media Converter or Line-card configuration. The TK3723 is compatible with all Teknovus ONU chipsets.