gtpd2m0u | Data Communications Services Reference |
All requests for sending an unsolicited message will be executed in the CPU in which it was entered, for the network immediately attached to that host. The one exception to this is sending a message to a specific LNIATA. Sending a message to an LNIATA has the option of including a CPU identification, which if utilized, routes the message, unaltered, to the CPU indicated. The remote CPU must be a valid host and be able to accept and execute the request.
The queueing of unsolicited messages will be done by each host, upon examining its own immediate environment. The basic queueing logic for the two basic types of messages are: (a) for application messages, the terminal must be logged into the application in question; (b) sending to a vertical address implies that locally attached hardware will be the only terminals eligible for the message. This includes both communication and local channel connected terminals.