Diamond Systems Epsilon-12G2

Managed 14-Port Gigabit Ethernet Switch with Wide Voltage Input and Serial Management Port


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.

Cable Kit

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

Main Specification

FunctionSwitch Type
• 14-port, Layer 2+ switch
• Built-in MIPS 416MHz 24KEC microcontroller for configuration and management

On-board Memory
• 4Mb packet memory
• Shared memory buffer with per-port & CoS memory management

• Hierarchical MEF compliant policing & scheduling
• MEF E-Lane, E-Line, and E-Tree services

Frame Buffer: Jumbo frame support at all speeds

• 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
• 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

Standalone Capable Standalone network switch, or in combination with a host computer
Interface(s)12 10/100/1000Mbps Ethernet ports with non-blocking wire-speed performance
1 1G SFP socket
1 2.5G SFP socket
Connection(s)Serial Port
• 1 RS-232 port for host interface

Indicator LEDs
• 24 status LEDs, two per port
• 2 general purpose

12 latching headers for each standard Ethernet port
2 SFP sockets



Electrical+5 to +40V DC/DC power supply
5.4W typical at +5VDC
Mechanical95 x 125mm, COM Express Basic footprint/mounting holes
Conformal CoatingOn request
SoftwareThe switch is ready to plug into your application without any driver installation or firmware upgrades
A web interface and a CLI provide an intuitive GUI for configuring and managing the switch
TemperatureTemperature range (operation): -40°C to +85°C (-40°F to +185°F)
Temperature range (storage): -40°C to +85°C (-40°F to +185°F)
Humidity5% - 95% relative humidity
Weight4.9oz (138.9g) with heatsink
MTBF122,656 hours
Warranty1 Year


Ordering Details

Epsilon-12G2 14-Port Gigabit Ethernet Switch COM Express Module, -40°C to +85°C operating temperature
Cable Kit for Epsilon-12G2: Ethernet (12), power and serial cables

Epsilon daisy-chain cable (for connecting Epsilons together to create a larger switch)
Recab UK
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