Logical unit destinations

You can use the CMSG transaction to send messages to logical units. Each logical unit in a CICS®-SNA network is identified by a single terminal identifier and, if the logical unit is capable of receiving message text, messages can be routed to it in the same way as they are routed to non-SNA terminals.

You can also route messages by operator identifier if the logical unit supports operator signon. You can specify SNA and non-SNA destinations in the same ROUTE option.

The destination for a message sent to a logical unit can be a display or printer device, a data set, or an application program in a subsystem controller. To the message sender, the destination behaves like a “terminal”, and any necessary formatting is performed by the CMSG transaction or within the subsystem controller itself.