The remote API facility allows requesting a UAP to execute a service even if the UAP is inside a firewall. Figure 3-63 illustrates a remote procedure call to inside of a firewall. If you use TP1/Client, see the manual OpenTP1 TP1/Client User's Guide TP1/Client/W, TP1/Client/P.
Figure 3-63 Remote procedure call to a UAP inside a firewall