Black Box LEH812-2MMST Hardened Managed Ethernet Switch

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Hardened Managed Ethernet Switch, 12-Port 10/100BASE-TX + 2-Port 100BASE-FX ST® Multimode (2 km)


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  • IP multicast filtering through IGMP snooping V1, V2, and V3.
  • Supports port-based VLAN and IEEE 802.1Q VLAN tagging.
  • IEEE 802.1p Quality of Service (QoS) with four priority queues.
  • MAC-based trunking with automatic link failover.
  • Manageable through a RS-232 console; Telnet; SNMP V1, V2c & V3; RMON; a Web browser; and TFTP.
  • Supports command line interface on an RS-232 console.
  • Supports IEEE 802.1x security.
  • Complies with the IEC 61000-6-2 EMC generic standard immunity for industrial environments.
  • Bandwidth rate control.
  • Per-port programmable MAC address locking.
  • Up to 24 static secure MAC addresses per port.
  • Port mirroring.
  • 8K MAC addresses.
  • 2 Mb buffer memory.
  • Operates 10-/100-Mbps full-/half-duplex.
  • Autonegotiation, auto-MDI/MDIX.
  • Full wire-speed forwarding rate.
  • Redundant power inputs include a terminal block and DC jack.
  • Supports DIN-rail, panel, and rackmount installation.
  • Complies with NEMA TS1 & TS2 environmental requirements for traffic control equipment.
  • Supports Network Time Protocol (NTP).
  • IEEE 802.1w, IEEE 802.1S, and IEEE 802.1D spanning tree.

Designed for rugged environments, this Hardened Managed Ethernet Switch comes with (12) 10-/100-Mbps RJ-45 ports and (2) 100BASE-FX ST multimode ports in an enclosure that offers several mounting options. Fully manageable via SNMP, a Web browser, Telnet, or a console port, the LEH812-2MMST is designed to integrate 10-/100-Mbps networks into 100BASE-FX backbones.

  • Operates in very hot and very cold conditions—even outdoors in sheltered locations.
  • Great for traffic signal applications.
  • Support for network redundancy; offers a recovery time of <15 ms.
Forward and Filtering Rate 14,880 pps for 10 Mbps; 148,810 pps for 100 Mbps
MAC Addresses 8K
Operating Temperature -40° to +167° F (-40° to +75° C)
Packet Buffer Memory 2 Mb
Processing Type Store-and-forward, half-duplex back-pressure and IEEE 802.3x full-duplex flow control
Standards IEEE 802.3 10BASE-T, IEEE 802.3u 100BASE-TX/100BASE-FX, IEEE 802.1p, IEEE 802.1Q, IEEE 802.1w, IEEE 802.1x
CE Approval Yes
Connectors 10/100BASE-TX: (12) RJ-45; 
100BASE-FX: (2) ST (multimode);
Console: (1) DB9 F (RS-232)
Indicators Power status: Power 1, Power 2, Power 3;
Per port: 10/100TX, 100FX: Link/Activity, Speed; 10/100: Link/Activity, Speed
Power Input voltage: 12-32 VDC (terminal block); 12 VDC (DC jack);
Consumption: 15 W (max.); 1.25 A at 12 VDC, 0.625 A at 24 VDC
Size 2"H x 9.25"W x 5"D (5.1 x 23.5 x 12.7 cm)
Weight 3.3 lb. (1.5 kg)

Part code:

LEH812-2MMST

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Black Box LEH812-2MMST Hardened Managed Ethernet Switch

Black Box LEH812-2MMST Hardened Managed Ethernet Switch

Hardened Managed Ethernet Switch, 12-Port 10/100BASE-TX + 2-Port 100BASE-FX ST® Multimode (2 km)