Terminal connections to IMS

IMS supports various modes of communication or attachment, usually using VTAM®. Remote attachments are either switched or nonswitched.

Terminals that are attached by using VTAM are assigned a terminal type. The addresses of the lines and terminals that IMS uses are transparent to IMS, because they are not specified during IMS system definition. Instead, all VTAM resources have names assigned to them.

Definition:  Each logical unit is assigned a node name that your installation defines.

The node name that is chosen for the VTAM definition is also used in IMS system definition and commands. Using VTAM enables IMS users to share network resources with other VTAM applications.