100M UTP Data Diode with proxy support



The CT-xxPD is a two part 100Mbps Ethernet  data diode that guarantees one way data transmission.   A proxy port is provided at the transmit side to provide for TCP based application development.  The CT-xxPD is a Layer 1 device and operates at wire speed for transparent performance. Desktop or rack-mountable the GF-xxRD takes data security to new levels.

  • Separate transmit and Receive diodes
  • Redundant power supplies
  • No vulnerable software, firmware, memory or buffers that may otherwise be exploited.
  • Tamper proof casing

Technical Notes

Why do I need a data diode ?

Data diodes play an integral part in securing the most critical business assets, protecting the most valuable data and ensuring operational continuity.

The physical nature of a data diode ensures data can only ever flow in one direction. Typically they are deployed at the boundary between a high security environment and a lesser network, data diodes stand guard at this intersection where unrestricted two-way communications would otherwise increase the risk of malicious attack and data loss.


Item Description

IEEE 802.3u        100BASE-TX, 100BASE-FX



100 Mbps (One-way transmission Max.)


5.5 lb.  (2.5 Kg) (shipping wt.)


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

Optional: 9 - 48 VDC input + Terminal Block ( -V) (CT-21PD-V and GT-55PD-V )




Operating:    0º C to 50º C

Storage:    -20º C to 70º C


Operating:    10% to 80% RH

Storage:        5% to 90% RH


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
CT-21PD Tx-Only Simplex Multi-mode SC 100Mb F/O port & 2 Local Bi-directional Host - Proxy RJ-45/UTP ports
CT-21R Rx-only m/m SC Fiber plus Local RJ-45 Tx port
CT-91PD Tx-Only Simplex Single-mode SC 100Mb F/O port & 2 Local Bi-directional Host - Proxy RJ-45/UTP ports
CT-91R Rx-only s/m SC Fiber plus Local RJ-45 Tx port

More Information