AT&T System 85 manual Data Module

3270 Data Module

3270 Data Module

The 3270 Data Module provides a Category A coaxial DCE interface for connection to 3270-type data terminals or a cluster controller. It also provides a DCP interface for connection to the digital switch.

The 3270 Data Module is available in the following three models:

3270T (Terminal)Connects to a Category A 3270-type terminal, such as the IBM 3278 Information Delivery System. The 3270T Data Module must connect through the switch to a 3270C (Controller) Data Module.

3270A (Asynchronous)Provides the same function as the 3270T Data Module. It also allows the 3270-type terminal to emulate a DEC VT100 or AT&T’s Information Systems asynchronous terminal.

3270C (Controller)Connects an IBM 3274 or 3276 cluster controller to the switch. A 3270C Data Module (See Figure 2) can contain as many as eight ports.

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