GM3 - Quad Gigabit Ethernet Rear I/O Card

The GM3 is a mezzanine card which is plugged onto CompactPCI Serial CPU boards to implement four Ethernet interfaces on the backplane.

The CompactPCI Serial standard defines up to eight Ethernet interfaces, which can be connected in a star or in full mesh architecture via the backplane. The GM3 is used to implement four Gigabit Ethernet interfaces, which are led to the backplane via CompactPCI Serial connector P6. All four interfaces are controlled by one Ethernet controller, which supports the IEEE 802.3x standard.

In addition, the GM3 also provides a mSATA SSD slot.

The board is screened for operation in the extended temperature range of -40 to +85°C.


  • Mezzanine card for CompactPCI Serial CPU boards
  • Four 10/100/1000Base-T Ethernet channels
  • Support of full mesh and star architecture
  • Wake-on-LAN
  • Fully integrated to comply with IEEE802.3u and IEEE802.3ab
  • TCP/IP checksum offload
  • -40 to +85°C screened


Ethernet Interfaces
  • Four 10/100/1000Base-T interfaces
  • IEEE802.3x support
    • Full-duplex flow control
    • 100 Mbit/s data transfer rate for each interface when used simultaneously
  • TCP/IP checksum offload
  • Wake-on-LAN support
mSATA slot
Solid state drive socket
CompactPCI Serial
  • Compliance with CompactPCI Serial PICMG CPCI-S.0 Specification
  • Ethernet interfaces via CompactPCI Serial connector P6
Electrical Specifications
Supply voltage/power consumption:
  • +3.3 V (-10%/+10%) from CPU board, 5.83 W max.
  • ±0.79 W standby max.
Mechanical Specifications
  • Dimensions: 81 mm x 95 mm (without P6 connector)
  • Weight: 40 g
Environmental Specifications
  • Temperature range (operation):
    • -40..+85°C
    • Airflow: min. 1.5 m/s
  • Temperature range (storage): -40..+85°C
  • Relative humidity (operation): max. 95% non-condensing
  • Relative humidity (storage): max. 95% non-condensing
  • Altitude: -300 m to +3,000 m
  • Shock: 50 m/s², 30 ms
  • Vibration (Function): 1 m/s², 5 Hz - 150 Hz
  • Vibration (Lifetime): 7.9 m/s², 5 Hz - 150 Hz
  • Conformal coating on request
3 269 078 h @ 40°C according to IEC/TR 62380 (RDF 2000)
PCB manufactured with a flammability rating of 94V-0 by UL recognized manufacturers
Conforming to EN 55022 (radio disturbance)
Software Support
  • Windows
  • Linux