Thank you for your reply.
I will study what you have exposed, that's really interesting
I found a software as the same time called type80 syslog http://www.type80.com/products_syslog.htm.
"Type80 Syslog for z/OS enables extension of all mainframe console messages and write-to-operator messages to be routed to external log retention servers using the standard TCP/IP Syslog protocol."
"Type80 Syslog messages are sent in "Real-Time".
They seems to exist a Syslog Protocol, I will try to understand how they do that.
Regards