Features *Support 4 1000Base-X SFP slot and 24 10/100/1000Base-T(X) Ethernet port. *Support G.8032(ERPS), IEEE802.3, IEEE802.3u, IEEE802.3z, IEEE802.3x, IEEE802.3ad, IEEE802.3ab, IEEE802.1p, IEEE802.1x, IEEE802.1Q, IGMP Snooping, IPv4/IPv6 precedence. *Support CLI, SNMP, WEB management, Console/Telnet command-line management and syslog, using self-developed ring network technology, recovery time <20ms. *DC36-72V redundancy power, reverse polarity protection. *Industrial grade 4 design, -40-85°C operating temperature. *IP40 rated aluminum alloy housing, 19 inch rack mounted. Parameters Interface Fiber Port 4*100/1000Base-X SFP Ethernet Port 24*10/100/1000 Base－T Manage Port 1*RJ45 Console port Power connector 4P Phoenix terminal, dual power supply redundancy,100-240VAC input LED Indicator Power indicator: PWR (green);System indicator:SYS (green); Network indicator: Speed (green) Link (yellow), optical port L/A (green) Cable type and distance Twisted pair cable 0-100m (CAT5e, CAT6) Single-mode fiber 20/40/60/80/100KM Multimode fiber 550m/2KM Optical fiber interface LC/SC Network topology & scale Ring topology Support Star topology Support Bus topology Support Tree topology Support Hybrid topology Support Electrical characteristics Input voltage DC36~72V/AC 100-240V 50-60HZ Power consumption Non-POE full load (Total power) <70W L2 Features Exchange capacity 128G Packet forwarding rate 95.23Mpps MAC address table 16K VLAN support and quantity Support 4K Report buffer 12M Forwarding delay <10us Port characteristics Cross-connect and direct-adaptive Flow control Support Jumbo frame support Support 10Kbytes Spanning Tree Protocol Support STP/RSTP/MSTP Ring network protocol Support ERPS Link aggregation Support 16 groups Multicast Support IGMP Snooping Port mirroring Support Storm suppression Support Port traffic statistics Support Port flow system Support QINQ Support        Protection Shell: IP40 protection, aluminum alloy housingIEC 61000-4-5 Level 3 (4KV/2KV) (8/20us) IEC 61000-4-5 Level 3 (6KV/2KV) (10/700us) IEC 61000-4-3 Level 3 (10V/m) IEC 61000-4-4 Level 3 (1V/2V) IEC 61000-4-6 Level 3 (10V/m) IEC 61000-4-8 Level4 (30A/m) IEC 61000-4-11 Level3 (10V) EMI CLASS A IEC 61000-4-2 Level 4 (15KV/30KV) Free fall 0.5m Convergence Service ACL Support 500 ACLs;Support IP standard ACL; Support MAC extended ACL; Support IP extended ACL; QoS Support QoS re-marking and priority mapping;Support SP, WRR queue scheduling; Support entry speed limit and exit speed limit; Support flow-based QoS Management function Command line Support Management serial port Support Telnet Support WEB management Support SNMP Support SNMPv1/v2c User management Support System log Support File upgrade Support Firmware upgrade Support SFP module DDM Support Environmental conditions Working temperature -40℃~+85℃ Storage/transport temperature -40℃~+85℃ Relative humidity 5%~95% does not support condensation (non-condensing) Cooling method No fan design, natural heat dissipation MTBF 100,000 hours Mechanical structure Size 440X250X44.5mm Installation method 1U19 inch rack mount Weight 3.5KG Dimension Order Information Model No. Description of Goods JHA-MIGS4024H Managed Industrial Ethernet Switch, 4 1000Base-X SFP Slot and 24 10/100/1000Base-T(X), DC36~72V, -40-85°C Operating Temperature Power Supply:DC36~72V/AC 100-240V 50-60HZ Power Supply or Power Adapter is Optional.