Virtual Telecommunications Access Method

What Does Virtual Telecommunications Access Method Mean?

Virtual Telecommunications Access Method (VTAM) is an IBM application programming interface that allows application programs to communicate or exchange data with external devices such as mainframes, communications controllers, terminals, etc. VTAM helps to abstract these devices into logical units so that developers do not need to know the underlying details of the protocols used by these devices.

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Techopedia Explains Virtual Telecommunications Access Method

VTAM includes macro instructions that provide a consistent protocol for device connections and can use synchronous or asynchronous operations. This protocol enables different types of legacy programs to be connected to modern device systems.

VTAM eventually became part of IBM’s Systems Network Architecture and Systems Application Architecture.

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Margaret Rouse

Margaret Rouse is an award-winning technical writer and teacher known for her ability to explain complex technical subjects to a non-technical, business audience. Over the past twenty years her explanations have appeared on TechTarget websites and she's been cited as an authority in articles by the New York Times, Time Magazine, USA Today, ZDNet, PC Magazine and Discovery Magazine.Margaret's idea of a fun day is helping IT and business professionals learn to speak each other’s highly specialized languages. If you have a suggestion for a new definition or how to improve a technical explanation, please email Margaret or contact her…