7-10 Direct Connections
■Flow Control — Configure each port on the terminal server for hardware flow control. If the receive and transmit functions are each configurable, make sure they are both set for hardware flow control. An improper flow control setting could result in the loss of characters, causing the remote terminal to display incomplete or garbled information.
■DTR Control — This setting is crucial to the operation of the Integrated Remote Console. The terminal server must be programmed to assert DTR whenever a communication (TELNET) session is open on the selected serial port. Integrated Remote Console uses the DCD control signal (which is driven by the terminal server’s DTR output) to determine whether a remote session is open. Integrated Remote Console ignores any serial port activity whenever DCD is inactive. Consequently, if the terminal server does not assert it’s DTR output, it is impossible to establish a connection with Integrated Remote Console. Conversely, if the terminal server always asserts DTR, IRC always thinks a remote session is being requested, which could result in a slight performance penalty on the managed server. In addition, IRC does not automatically log out a user whenever the communication port is closed. For proper operation of IRC, the DTR output of the terminal server must be asserted whenever a communication session is opened, and removed whenever a communication session is closed.
