AÂ hardware device allows terminals to connect to a LAN (local area network) or to the in without the need for a modem or a NIC (network interface card). A terminal may be a printer, PC, IBM 3270 emulator, or a device with an RS-232 / RS-423 serial port interface. You will find that many terminal servers are able to support connections of as many as 128 terminal devices.
What is a Terminal Server?
A terminal server allows people to connect computers and mobile devices with an RS-422, RS-485 or RS-232 serial interface to a LANGUAGE. You can buy terminal servers without security features and some are very simple devices. They can be used in a number of ways. And the main function is that if you have a service device and you want to move data over the LAN. Then you need a terminal server.
There are some terminal servers that offer user authentication and data encryption. And some that have very high-quality security because of the consumer demand. It is understood that if a person buys a terminal server then they are going to need security anyway. So, purchasing a device with a higher level of security seems to make sense. So, the higher quality devices will allow one qualified person to access a number of servers. And that will obviously ensure that all data communicated over the LAN or Internet is secure and encrypted.
Do I Buy?
Buy a terminal server and you are able to have serial devices account network server applications. And have network server applications access serial devices. Security of the data may not be an issue. And if that is the case then it doesn’t make the process any easier. It may simply mean making it cheaper by not having to concentrate on security as hard.
There are some companies that spend a lot of money on terminal servers. Because they want high-quality security and advanced functions. They may want to monitor equipment over a telecommunications network, and they may wish to diagnose, troubleshoot and even remote control equipment over a telecommunications network.
This article is far too short to cover the ins and outs of terminal servers, their uses, and their connections, but if you are interested then as a rough guide you should research: a raw TCP socket connection, virtual modem, raw UDP socket connection, console management such as reverse Telnet and reverse SSH, serial tunneling between two serial devices, back to back applications and finally how you connect serial-based applications with your COM/TTY port driver.
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Photo cred: Flickr /Â trekkyandy
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