Virtual Telecommunications Access Method (VTAM)
Definition - What does Virtual Telecommunications Access Method (VTAM) 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.
Techopedia explains Virtual Telecommunications Access Method (VTAM)
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.
- Systems Network Architecture (SNA)
- IBM I
- Storage Device
- Application Virtualization
- Network Addressable Unit (NAU)
- Transmission Control Protocol/Internet Protocol (TCP/IP)
- Virtual Telecommunications Access Method (VTAM)
- Synchronous Data Link Control (SDLC)
- Advanced Peer-To-Peer Networking (APPN)
- Open Systems Interconnection Model (OSI Model)
Your Car, Your Computer: ECUs and the Controller Area Network
Join thousands of others with our weekly newsletter
The 4th Era of IT Infrastructure: Superconverged Systems:
Approaches and Benefits of Network Virtualization:
Free E-Book: Public Cloud Guide:
Free Tool: Virtual Health Monitor:
Free 30 Day Trial – Turbonomic: