Gigabit Data Diode, 2 channel with copper user ports



The GT-xxTD provides two independent channels of 1000Mbps Ethernet.   A totally hardware based solution the GT-xxTD is a Layer 1 device and operates at wire speed for optimal performance. Desktop or rack-mountable the GT-xxTD takes data security to new levels.

  • No vulnerable software, firmware, memory or buffers that may otherwise be exploited.
  • Tamper proof casing
  • Unidirectional fibre links transmit and receive diodes
  • Guaranteed one way transmission
  • No physical return path

Technical Notes

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


1000 Mbps


100 ~ 240 VAC Auto-ranging wall-mount;
9 - 48 VDC input  Terminal Block option


Operating: 0° to 50°C

Storage: -20° to 70°C


Operating:  10% to 80% RH

Storage:  5% to 90% RH


FCC Part 15 of Class B

CE Mark EN55022


Class 1, US 21 CFR (J) & EN 60825-1 standards

EN 60950 & UL 1950 applications


(D x W x H)  127mm x 203mm  x 44mm



Ordering Information

Order Code Description
GT-55TD Tx-Diode, 2 RJ-45 1000Mb, 2 Multi-mode (SX-SC)
GT-55TR Rx-Diode, 2 Multi-mode (SX-SC), 2 RJ-45 (1000Mb)
GT-31TD Tx-Diode, 2 RJ-45 1000Mb, 2 Single-mode (SX-SC)
GT-31TR Rx-Diode, 2 Single-mode (SX-SC), 2 RJ-45 (1000Mb

More Information