A virtual terminal is basically a software that is run on your computer, where you input credit card information when making sales. Think of it as a point-of-sale terminal hardware, without the hardware. Your computer needs to be connected to the internet so that the credit card information is processed through whomever you use as a merchant account provider.
You can also purchase a card reader that plugs into your computer, so you can actually swipe credit cards that way.
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-You can't control which of the virtual terminal lines the user will connect to
A virtual terminal is a software solution for accepting credit card payments using your computer. You need to be online, as it is a front-end connection to a payment gateway, which processes the payment. Think of it as the virtual equivalent of a point-of-sale terminal, where you swipe your credit card. As a matter of fact, you can use an optional card reader that plugs directly into your computer to swipe and store credit card information. Typically, small business owners or travelling sales use a virtual terminal, since it is a portable payment solution without the cost of physical hardware.
line vty access-class
there are 5 virtual terminal available with router
A virtual credit card terminal works the same as a regular terminal without having to physically swipe your card. It takes the information put in and uses that to process the transaction.
VIRTUAL GROUND:-1]If the non-inverting (+) terminal of OP-AMP is connected to ground, then due to the "virtual short" existing between the two input terminals, the inverting (-) terminal also be at ground potential. hence it is said to be as "virtual ground".2]similarly if the inverting (-) terminal is connected to ground, then the non- inverting (+) terminal will be at "virtual ground" potential.3]The concept of virtual ground has been used extensively for amplifier analysis, specially we use this concept in the inverting amplifier.VIRTUAL SHORT:-1] The input impedance (Ri) of an OP-AMP is ideally infinite. Hence current "I" flowing from one input terminal to the other will be zero.2] Thus the voltage drop across Ri will be zero and both input terminals will be at the same potential. In other words they are virtually shorted to each other.
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You have two command-line options is ubuntu: 1) terminal emulator in a fancy window or 2) the old school virtual terminal. 1) the terminal emulator is a normal window on your desktop that you type commands into. To open it in ubuntu 13.04, just type "terminal" into the search bar (hit ubuntu symbol in top left corner to get it) and click on the terminal icon. 2) The old school version has the advantage of not running in the current graphical desktop, useful if the desktop dies or you want to remove distraction. You normal have 7 virtual terminal at startup. They can be accessed using the key combo "ctrl-alt-Fx" where x is a number 1-6. The 7th virtual terminal is running you graphical desktop, this can be re-accessed by type alt-ctrl-F7 from any virtual terminal. For beginners I suggest using 1. For people who want a true terminal experience, use 2.
iDeposit and Riptide Hosting are two popular companies offering virtual terminal services in America. Both are well-known companies with excellent reputation.
On booting into linux, (I use Ubuntu 12.10) a Graphic User Interface (GUI) will appear, which is the desktop.Pressing the Ctrl and Alt keys and tapping the letter "T" key will open a terminal window ready to take your text commands.Apart from the above, there are "Virtual Terminals" available.Press down the Ctrl and Alt keys and a function key (f1 to f6) and the GUI will disappear and you will enter a black virtual screen. After logging on with your username and password, you can type commands. To escape from a virtual terminal press Ctrl and Alt and f7, and you will be returned to the GUI desktop.
Network Virtual Terminal, is a software version of a physical terminal and allows a user to log on to a remote host .So the application created emulation of terminal at the remote host .Users computer talks to the software terminal which in turn talks to the host & vice verse .Remote host believes it is communication with one of its own terminals and allow you to log on
ncomputing using terminal service like we use for vnc (virtual network connection), like windows have remote desktop, on Linux generally using vnc for default remote connection. by ncomputech.com