This media and rate converter line card features a 10/100/1000T twisted pair port and an optical SFP port. The twisted pair has an RJ-45 connector and a maximum operating distance of 100 meters (328 feet) when connected to an Ethernet or Fast Ethernet or Gigabit Ethernet device. They operate in full or half-duplex mode, and allow you to build an affordable network, avoiding the cost of terminatiang fiber cables. The AT-CM3K0S has a SFP port supporting both Fast Ethernet and Gigabit operation, allowing a choice of multi/single mode, dual/single fiber SFP modules. - Converts speed as well as media type - Extends Ethernet and Fast Ethernet and Gigabit Ethernet networks - Supports IEEE 802.3ah ‘Ethernet in the First Mile’ - Support MissingLink™ and Smart MissingLink™ - Transparent to IEEE 802.1Q VLAN packets - Jumbo Frame Support - Rate Limiting - Low Power Mode - Supports Dying Gasp - Automatic address learning and aging - Managed, or Unmanaged operation - Auto MDI/MDI-X - Auto-Negotiation (IEEE 802.3u-compliant) - Store and forward data packet handling - Supports 100 and 1000Mbps SFPs - System and port LEDs - Line card for all Converteon™ series chassis - Limited lifetime warranty