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Products   >   I/O Expansion Modules   >   Communications Modules   >   Epsilon-12G2 14-Port Gigabit Ethernet Switch
12 Gigabit Ethernet ports with non-blocking wire-speed performance
1 1G SFP socket; 1 2.5G SFP socket
Built-in 416MHz MIPS 24KEC microcontroller for configuration and management
RS-232 serial port provides out-of-band management interface
Can operate autonomously or in conjunction with a host SBC
8K MAC addresses and 4K VLANs (IEEE 802.1Q), as well as 8K IPv4 and IPv6 multicast group support
Jumbo frame support at all speeds
Dual leaky bucket policers with remarking and statistics
Flexible link aggregation support based on Layer-2 through Layer-4 information (IEEE 802.3ad)
Multicast and broadcast storm control, as well as flooding control
Rapid Spanning Tree protocol (RSTP) and MSTP
8 priorities and 8 QoS queues per port with scheduling
Shaping/policing per queue and per port
Multiple protocol support: IEEE 802.1d, IEEE 802.1w, IEEE 802.1s, and IEEE 802.1X
Wide input voltage range: +5-40VDC
Latching connectors for improved ruggedness
COM Express form factor module
(95 x 125mm)
Extremely rugged -40ºC to +85ºC operating temperature
Customers who use this product also use:
Epsilon daisy-chain cable

This product can be customized and ruggedized. Click here for more information.
See Epsilon-12G2 14-Port Gigabit Ethernet Switch Technical Resources
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Epsilon-12G2 Datasheet
(.pdf, 218.8 kb)
Epsilon-12G2 User Manual
(.pdf, 583.0 kb)

Epsilon-12G2 14-Port Gigabit Ethernet Switch

Managed 14-Port Gigabit Ethernet Switch with wide voltage input and serial management port

COM Express

Epsilon-12G2 Managed Switch

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Block Diagram
Cable Kit
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Epsilon-12G2 is a managed Layer 2+ Ethernet switch module offering twelve 10/100/1000Mbps copper twisted pair ports and two small form factor pluggable (SFP) sockets in the compact COM Express form factor. Epsilon-12G2 is designed for rugged applications including industrial, on-vehicle and military.

Epsilon-12G2 is a standalone switch that does not require any host computer interface. All switch functions are managed by a 480MHz MIPS processor embedded directly into the switch. The processor is accessed via an in-band web interface over one of the Ethernet ports or via an out-of-band command-line interface over an RS-232 serial port. The integrated web interface provides an intuitive GUI for use in configuring and managing all switch functionality. On-board memory holds dual application images, boot code, MAC addresses, and other parameters, and can also be used for program execution.

Epsilon-12G2 includes a dual SFP socket for interfacing to 1G fiber Ethernet networks. One port can operate at enhanced 2.5G speed to support efficient stacking of two switches together for a combined total of 26 ports.

Epsilon-12G2's advanced Ethernet switch board includes two innovative features that enable automatic power savings. The switch can detect unused Ethernet ports on network devices and power them down or place them in stand-by mode. Additionally, the switch actively adjusts the power level needed based on cable length, saving energy on links shorter than the 100m maximum specified length.

Input power is provided through the built-in, wide-range +5 to +40VDC power supply, enabling operation using industrial power sources.

Epsilon-12G2 was designed for use in vehicle and harsh environment applications. All I/O connectors are latching, providing enhanced reliability over the RJ-45 connectors used in commercial Ethernet switches. A 50% thicker PCB provides better protection against vibration in vehicle environments. The wide range 5-40V input power supply is compatible with all common vehicle and industrial power sources. The -40ºC to +85ºC operating range makes Epsilon-12G2 suitable for use in outdoor and vehicle applications.

Epsilon-12G2 comes loaded with all required firmware, enabling its immediate operation without any development effort. The included web interface provides an intuitive GUI for use in configuring and managing switch functionality.

Block Diagram

Epsilon-12G2 Block Diagram

Cable Kit

The Epsilon-12G2 cable kit includes cables for Epsilon's input and output.

Epsilon-12G2 Cable Kit

Number Qty Cable Description
1 1 6981050 Serial cable
2 12 6981052 Ethernet cable
3 1 6981053 Power cable


Managed Ethernet Switch
Switch Type 14-port, Layer 2+ switch
Built-in MIPS 416MHz 24KEC microcontroller for configuration and management
Number of Ports 12 10/100/1000Mbps Ethernet ports with non-blocking wire-speed performance
1 1G SFP socket; 1 2.5G SFP socket
On-board Memory 4Mb packet memory
Shared memory buffer with per-port & CoS memory management
MEF Hierarchical MEF compliant policing & scheduling
MEF E-Lane, E-Line, and E-Tree services
Frame Buffer Jumbo frame support at all speeds
VLAN IEEE 802.1Q VLAN switch with 8K MACs and 4K VLANs
Push/pop up to two VLAN tags
Independent & shared VLAN learning (IVL, SVL)
Multicast IPv4 and IPv6 multicast group support
Remarking Dual leaky bucket policers with remarking and statistics
Classifier 8 priorities and 8 CoS queues per port with strict or deficit-weighted round robin scheduling
Shaping/policing per queue and per port
Storm Control Policing with storm control and MC/BC protection
Link Aggregation IEEE 802.3ad
Security Advanced security and prioritization available though multistage TCAM engine
RSTP Rapid Spanning Tree Protocol (IEEE 802.1W) and MSTP
MIBs Support for both WebStax and CEServices MIBs
Power Management ActiPHY and PerfectReach power management
VeriPHY cable diagnostics
Serial Port 1 RS-232 port for host interface
Indicator LEDs 24 status LEDs, two per port
2 general purpose
Standalone Capable Standalone network switch, or in combination with a host computer
Power Input +5 to +40V DC/DC power supply
Power Consumption 9.2W maximum with all ports active
Form Factor COM Express (95 x 125mm)
Operating Temperature -40C to +85C (-40F to +185F)
Weight 4.9oz (138.9g) with heatsink
MTBF 122,656 hours
RoHS Compliant

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Epsilon-12G2 14-Port Gigabit Ethernet Switch
available models:
14-Port Gigabit Ethernet Switch COM Express Module, -40C to +85C operating temperature
Cable Kit for Epsilon-12G2
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Cables and accessories
available models:
Epsilon daisy-chain cable
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