The terminal control program (ARTTCP) is a group of Tuxedo servers that manage the connections of 3270 terminal emulators to CICS Runtime. When you run programs, the ARTTCP connects terminal emulators to the network ports assigned to ARTTCP. ARTTCP communicates with the emulator using a Telnet protocol.

The ARTTCP server is composed of two types of servers: a single ARTTCP listener (ARTTCPL) process and one or more ARTTCP handler (ARTTCPH) processes. The ARTTCPL process establishes a well-known listening port address to which terminal emulators may connect. The ARTTCPH process listens on this port and accepts incoming connection requests. The ARTTCPH process establishes your user session for the connection and handles all subsequent screen I/O for the terminal emulator. As a performance enhancement, each ARTTCPH process can manage multiple sessions simultaneously. When you disconnect the emulator from the port, the ARTTCPH terminates the session.

To join 3270 terminal to ART Runtime, you must specify the MAXWSCLIENTS parameter in the MACHINES section of the UBBCONFIG file. MAXWSCLIENTS is the only parameter that has special significance for ARTTCPL. MAXWSCLIENTS tells the Oracle ART at boot time how many accesser slots to reserve exclusively for 3270 terminals.

For MAXWSCLIENTS, specify the maximum number of 3270 terminal that may connect to a node. The default is 0. If not specified, terminal may not connect to the machine being described.

The syntax is MAXWSCLIENTS=number.