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  • Manual... 
  • LinkGain Ethernet Extender over Coax User Manual
    User Manual for the LBNC300A and LBNC300AE (Version 2)
  • Quick Start Guide... 
  • LPH1004A Series Hardened Ethernet PoE+ Switch QSG
    Quick Start Guide for the LPH1004A (Version 2)
  • Quick Start Guide... 
  • Hardened Managed Ethernet Switch Quick Start Guide
    Quick Start Guide for the LEH1100 Series (Version 1)

Product Data Sheets (pdf)...LPH1000 Series Hardened Ethernet Switch—(4) 10/100/1000 Mbps, (1) GE SFP

Product Data Sheets (pdf)...Standard Media Converter Switches

  • Manual... 
  • Industrial Ethernet Serial Server Upgrade Procedure
    Upgrade Procedure for the LES401A, LES402A, and LES404A
  • Video...Wireless Ethernet Extenders (LWE120 Series)

    Extend your network economically with the LWE120 Series Wireless Ethernet Extenders. This short video examines three ways to use Wireless Ethernet Extenders: in point-to-point enterprise, educational, and campus networks; in... more/see it nowpoint-to-multipoint networks for security and surveillance, SCADA, and industrial monitoring networks; and for networking in rural environments where there is no cable or DSL connectivity. (V0113) collapse

  • Quick Start Guide... 
  • 10BASE-T/100BASE-TX Hardened Ethernet Extender Switch, 8-Port
    Quick Start Guide for the LB308A (Version 2)

Black Box Explains…A terminal server by any other name.

A terminal server (sometimes called a serial server or a console server or a device server) is a hardware device that enables you to connect serial devices across a network.

Terminal... more/see it nowservers acquired their name because they were originally used for long-distance connection of dumb terminals to large mainframe systems such as VAX™. Today, the name terminal server refers to a device that connects any serial device to a network, usually Ethernet. In this day of network-ready devices, terminal servers are not as common as they used to be, but they’re still frequently used for applications such as remote connection of PLCs, sensors, or automatic teller machines.

The primary advantage of terminal servers is that they save you the cost of running separate RS-232 devices. By using a network, you can connect serial devices even over very long distances—as far as your network stretches. It’s even possible to connect serial devices across the Internet. A terminal server connects the remote serial device to the network, and then another terminal server somewhere else on the network connects to the other serial device.

Terminal servers act as virtual serial ports by providing the appropriate connectors for serial data and also by grouping serial data in both directions into Ethernet TCP/IP packets. This conversion enables you to connect serial devices across Ethernet without the need for software changes.

Because terminal servers send data across a network, security is a consideration. If your network is isolated, you can get by with an inexpensive terminal server that has few or no security functions. But if you’re using a terminal server to make network connections across a network that’s also an Internet subnet, you should look for a terminal server that offers extensive security features. collapse

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