Gigabit Data Diode, redundant backup link with copper user ports




  • Redundant fibre link for critical applications
  • No vulnerable software, firmware, memory or buffers that may otherwise be exploited.
  • Tamper proof casing
  • Guaranteed one way transmission
  • No physical return path


The GT-xxRD is a 1000Mbps Ethernet copper to coper data diode that assures one way data transmission via  unidirectional fibre links. A totally hardware based solution the GT-xxRD is a Layer 1 device and operates at wire speed for optimal performance. Desktop or rack-mountable the GT-xxRD takes data security to new levels.

Technical Notes

What is a data diode?

Data diodes are unidirectional data devices that prevent any unauthorised conversations taking place. Simply put - 'A data diode is a cybersecurity device that ensures data can only flow in one direction'

Configuring ARP for use across Data Diodes

Address Resolution Protocol (ARP) is a protocol used to ascertain the hardware address or Media Access Control (MAC) address from an IP address. Typically a sending station knows the destination IP that they wish to send to but does not the MAC address.  Before communication between the 2 hosts can occur an ARP request is sent to discover the destination MAC address.  The ARP request is directed to the destination IP address using a MAC broadcast address FF:FF:FF:FF:FF:FF.  All devices on the subnet receive this broadcast but only the destination with the correct IP address will respond.


Item Description

IEEE 802.3ab,z    1000BASE-T, 1000BASE-SX/LX


Typical: 100 ~ 240 VAC Auto-ranging wall-mount

Optional: 9 - 48 VDC input + Terminal Block


Operating:    0º C to 50º C

Storage:    -20º C to 70º C


Operating:    10% to 80% RH

Storage:        5% to 90% RH


5.5 lb.  (2.5 Kg) (shipping wt.)


CE Mark EN60950 & EN55022

FCC Part 15 of Class A


US 21 CFR (J) & EN 60825-1 standards and UL 1950 applications

EN 60950, CE, TUV


12.7 cm    x 20.3 cm    x 4.4 cm   (D x W x H)

Ordering Information

Order Code Description
GT-55RD Gigabit Transmit Diode with redundant multi-mode fibre links
GT-55TR Gigabit Receive Diode with redundant multi-mode fibre links
GT-31RD: Gigabit Transmit Diode with redundant single-mode fibre links
GT-31TR Gigabit Receive Diode with redundant single-mode fibre links

More Information