Serial Connectivity Series | Switch & Router | Ethernet Network Product Manufacturer | CTC Union

Ethernet Device Server | CTC Union's goal is to provide reliable, temperature resistant and rugged designs for harsh environments. We offer a full spectrum of products, including L3/L2 Switch, PoE Products, EN50155 and E-Mark certified switches.

Ethernet Device Server

Serial Connectivity Series

The STE Series are 1/4/8-port Ethernet Device Servers that allows hosts to control RS-232 asynchronous or 2/4 wire RS-485 asynchronous serial devices located virtually anywhere through a TCP/IP or UDP/IP connection. The STE Series provide DB9 port connection on one side and a 10/100 Mbps Ethernet connection on the other side.


Ethernet Device Servers connect serial devices such as PLC, alarm sensors and PTZ camera control to IP networks. Applications include industrial/factory automation, public safety and surveillance systems.

Serial Connectivity Series

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2 ports Serial to Ethernet Wireless Device Server - STE211 Series Serial Device Server
2 ports Serial to Ethernet Wireless Device Server
STE211W, STE211

The serial to Ethernet wireless device server (STE211W) and serial to Ethernet device server...

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4 × RS232/422/485 to IP Device Server - STE400A-485/232 IP Device Server
4 × RS232/422/485 to IP Device Server
STE400A-485, STE400A-232

The STE400A are 4-port RS232/422/485 to IP Device Servers that enable the ability to control...

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8-Port RS232 to IP Device Server - STE800A-232 IP Device Server
8-Port RS232 to IP Device Server
STE800A-232

The STE800A-232 is 8-port RS232 to IP Device Servers that enable the ability to control asynchronous...

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Result 1 - 3 of 3

Serial Connectivity Series | Switch & Router | Ethernet Network Product Manufacturer | CTC Union

CTC Union Technologies Co., Ltd., founded in 1993, is an ISO9001/14001 certified designer and manufacturer. CTC Union’s software development system follows the cybersecurity IEC62443 regulations for the design of Industrial & Telecom networking products. With their own in-house R&D and factory, CTC Union develops and manufactures high-quality products in Taiwan. CTC Union offers a full spectrum of products, including Serial Connectivity Series, Industrial Ethernet, PoE, EN50155 and E-Mark certified switches. CTC Union’s goal is to provide reliable, temperature resistant and rugged designs for mission critical systems used in harsh environments. With more than 30 years of experience in design of Telecom products, CTC Union is highly motivated to deliver various access switches and FTTP CPE products.

CTC Union is a leading Taiwanese manufacturer specializing in telecommunication products such as L2 Ethernet switches, transponders, and industrial Ethernet switches, converters, and injectors. The company maintains strict control over product design, ensuring compliance with certifications like CE, FCC, UL, IEC 62443-4-1, EN50155, EN45545-2, and IEC61850-3. CTC Union has established strong global partnerships with voice and data carriers, enterprises, and industrial Ethernet users, providing direct engineering and technical support from its headquarters in Taipei, Taiwan.