Methods of Connection

Each node in a CA IDMS DDS network is connected to at least one other node. Four types of connections can exist:

SVC (Supervisor Call) Routine—The SVC connects two nodes that reside in the same machine.
CCI—CCI connects two nodes on different machines or on one machine.
TCP/IP—TCP/IP connects two CA IDMS DDS nodes on different machines (or the same machine) and controls communication between the nodes.
Virtual Telecommunications Access Method (VTAM)—VTAM connects two CA IDMS DDS nodes on different machines (or the same machine) and controls communication between the nodes.

Typically, the types of connections chosen depend on the hardware and data communication facilities available at the site.