New Product

GCT - Serial Link
Ethernet to Serial Device Server / Converter
IS14232A / IS14245A / IS14422A / IS14TA

GCT-SLink provides 4 port RS232 and 1 port 10/100Base-Tx Ethernet, can focus manage disperse serial devices, through an IP network.

GCT-SLink allows a "remote" serial port for any LAN connected workstation via telnet or port-redirector software. It also connects any two async serial devices through a LAN, even via routers, when used in client-server or  direct mode. It is often used with serial devices such as remote data collection terminals, DCB multiplexers and Access Switches, SCADA, building automation equipment, UPS's, bar code scanners, or climate control devices. It is used to connect serial management ports directly to an Ethernet network for "in-band" control of "out-of-band" devices. For this application, simply telnet to the serial management port of the connected device or use inexpensive (or free) port redirector software.

GCT-SLink uses the TCP/IP protocol, allowing data connection across routed or switched LAN/WAN networks as well as connections on a local network.

GCT-SLink supports serial interface speeds up to 230 Kbps. It can automatically open connections when it powers up (Nailed-Up mode), eliminating the need for a manual request. Full flow controls (RTS/CTS) and Xon/Xoff are also supported.

GCT-SLink also allows a serial device to treat the modem as a true "Ethernet Modem", using normal modem control and response strings such as "ATD", "ATE", +++, etc. This allows a single modem to connect to multiple remote servers  under control of the attached serial device.

Reverse Telnet (Telnet Client) mode allows telnet functionality to be added to serial devices.
If in point to point client server mode and the "nailed" connection is lost, it automatically reconnects when a path again becomes available.

GCT-SLink can be managed directly through its physical port as well as remotely from other network locations. Remote configuration is supported using TCP/IP (telnet) or with the easy web browser interface. Security lists are provided for management security. supports RFC 2217 (remote control of serial port parameters), with a compliant client.

Salient Features:

  • Up To 4 RS 232 Port
  • Configuration via Web Browser, Telnet, or direct connection
  • SNMP functionality
  • Reverse Telnet, Telnet Client or Server capability
  • EtherPath RS-232 server connection over Ethernet LAN
  • RS-232 or RS-422 / RS-485 (2-wire or 4-wire) interface
  • Use to access remote serial devices via LAN
  • Use on the LAN or via Routers
  • Allow In-band access to equipment management ports
  • Compatible with popular port redirector" software
  • RS-232 interface supports true control lead handshaking

Technical Specifications:


  • Modes Supported:
    • Nailed-Up Client/Server (transparent
      RS-232 connection upon power-up)
    • Telnet Server ( any port ) ( or Raw TCP/IP
    • Telnet Client (any port), Reverse Telnet
    • Point-to-multiple point
  • Configuration Methods
    • Any Web Browser
    • Telnet Menu Interface
    • Direct Connection Menu Interface
  • SNMP agent functionality included
  • RS-232 serial port, DTE interface or RS-422/RS-485(2-wire or 4-wire)
  • DE-9 RS-232 male serial DTE (Commonly known as a PC COM: port DB-9) port
  • Serial speeds from 300 bps to 230,000 bps
  • RJ45 10/100BaseT Ethernet, auto selected
  • Transport protocol is routable TCP/IP
  • Works through any TCP/IP link... satellite, ISP, routers, wireless, broadband, etc.
  • Supports forced connections, required for connecting DCB multiplexers via LANs and routers
  • Set up via web browser, telnet command line interface or the serial port
  • 5-30 volt DC (external power supplies available for 220 VAC,)
  • 350ma @ 5 VDC, 200ma @ 12 VDC
  • Operating Temperature: -10 to _55C

   Front Panel Indicators

  • Serial Port Activity LED
  • LAN Activity LED
  • LAN Status LED
  • Power ON LED


  • Through Web interface

   Data Port

  • Interface: RS-232, V.24, or RS-422/485 (4-wire /2-wire), speeds up to 230,000 bps
  • Connector: DE-9P RS-232 (Commonly known as a DB-9 PC connector)

   Lan Connection

  • Interface: 10 BaseT or 100 BaseT, auto-select or forced

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