please note:  Default with 3pcs 1310nm A side Fiber module and 3pcs 1550nmB side ,6pcs 1550nm B Side or 6pcs 1310nm A side can be provided as request.    Other selection please leave us a message about your requirements.        Fast Ethernet Switch 10/100Base-Tx to 100Base-FX Fiber Switch  The Fast Ethernet Switch  is an Ethernet Fiber Switch which is specially designed for network monitoring. It  has 2*10/100Mbps Ethernet ports and 6*155Mbps fiber ports. It adopts RTL8309N chips to ensure  low power consumption and high stability. It extends the transmission distance of a network from  100m to 120km via copper cables. It can extend the transmission distance; there are also many other  advantages such as isolation protection, good data security, working stability and easy maintenance.  Main Features:  1.Support the switch between 10/100Base-TX and 100Base-FX  2.6*155Mbps fullduplex fiber ports and 2*100M Ethernet ports with auto-negotiation function  3.Support 100M speed rate, MDI/MDIX and half/full-duplex with auto-negotiation function  4.Each port has the complete LED Indicator light  5.Support single mode single fiber,single mode dual fiber ,multi-mode dual fiber and SFP slot  6.Support IEEE802.1d Spanning Tree  7.Support high performance QoS function on each port  8.Support 5V voltage input  9.Support IEEE 802.3x flow control and back pressure control  10.Require no configuration and will instantly operate as soon as you power it up  11.Low power consumption chip with heat sink built in to ensure longtime efficient operation              Specifications               Standards         IEEE802.3 10Base-T    IEEE802.3u 100Base-TX/FX    IEEE802.3x Flow control    IEEE802.1p QoS    IEEE802.1d Spanning Tree                 Ethernet Port         Connector: RJ45    Data Rate: 10/100M    Distance: 100m    UTP Type: UTP-5E or higher level               Fiber Port           Connector: SC      Data Rate: 155bps      Optical Wavelength: 850nm/1310nm/1490nm/1550nm      Distance: 25km               Performance         Processing Type: Store and Forward    MAC Table Size: 8K    Buffer Space: 1Mbit      Jumbo Packet: 1518 bytes    Back bandwidth: 5.6G    Time Delay: ＜150μs               Power         Power type: external power supply    Input Voltage: AC100V～240V 50/60Hz    Connector: DC Socket    Working Voltage: 5V    Power Consumption: 1.5W～2.