Overview
IP terminal access allows a terminal to access a remote Unix or Linux server, which is also known as a front-end processor (FEP), through a router. The router acts as the initiator to forward data between the terminal and the Unix or Linux server that serves as the receiver. Services running on the Unix or Linux server use the ETelnet server, ttyd, or sshd program to send service interfaces to the terminal through the router. IP terminal access identifies a terminal using its IP address and offers a series of functions, such as data encryption, screen saving, and terminal locking.
Figure 28 shows a typical IP terminal access application scenario.
Figure 27: Typical application of IP terminal access
In the figure, the initiator, which is enabled with IP terminal access, initiates a TCP connection to the receiver for the terminal in a bank outlet to access the FEP in the bank branch over an IP network. Banking services run on the FEP. Information entered into the terminal by an employee at the bank outlet is sent to the FEP through the initiator. The FEP then returns the corresponding service interface to the service terminal though the initiator, thereby implementing data exchange between the outlet and the branch.