The automatic logon capability allows JES2 to contact and connect an RJE terminal automatically. This can occur either when output (print/punch) or messages are queued for transmission for that terminal or when an authorized console operator issues the appropriate JES2 command. Automatic logon allows maximum use of communication facilities such as lines, adapters, modems, and controllers. For example, a line can be dedicated to a terminal using automatic logon. The efficiency is increased because RJE workstations need not remain logged on while waiting for output. This frees facilities for use with other terminals and applications.

Although JES2 automatically calls (actually dials-out in some cases) an RJE workstation to produce output or messages, the need for a terminal operator is still present. Automatic logon does not provide for unattended operation of the terminal. The operator must continue to control the terminal and take the necessary error recovery actions.

The automatic logon capability is available only to terminals operating in a VTAM® network using SDLC (synchronous data link control) or RECORD-mode communications. BSC RJE workstations are not supported by automatic logon.