"3 layer managed enterprise-level core switch High-performance switch chip, large cache, and no video lags Comply with IEEE802.3, IEEE802.3u, IEEE802.3ab, IEEE802.3z, and IEEE802.3x standards Supports STP, RSTP, and MSTP spanning tree protocol (STP)"

"3 layer managed enterprise-level core switch High-performance switch chip, large cache, and no video lags Comply with IEEE802.3, IEEE802.3u, IEEE802.3ab, IEEE802.3z, and IEEE802.3x standards Supports STP, RSTP, and MSTP spanning tree protocol (STP)"

"The DH-TAM1GT1GT-30 PoE+ Midspan is designed to work in extreme temperature environments and in applications that experience lightning. The midspan offers a single PoE+ (802.3at) port with an internal power supply in a compact housing. The midspan carries both data and power along an Ethernet cable for easy"

"Single mode single fiber; LC port; 1270nm sending, and 1330nm receiving; Transmission distance up to 20km;"