HP t5515 Inside the t5515 Thin Client Linux: FAQs - Page 16

Q: How do you configure the modem and related aspects? A: A System Administrator can setup and configure a serial modem to allow a user to remotely connect to a terminal server using the t5515. The following is a list of configuration instructions: Determing Recognized Serial Ports To determine the recognized serial ports, the t5515 serial ports are recognized at boot time. To display a list of recognized serial ports connected to your t5515 use the dmesg and fgrep commands to search for the phrase tty. Enter the following: dmesg | fgrep tty ttyS00 at 0x03f8 (irq = 4) is a 16550a (Is the on-board serial port.) dmesg dmesg [-c] [-n LEVEL] [-s SIZE] (Prints or controls the kernel ring buffer.) Options: Options -c -n LEVEL -s SIZE fgrep Description Clears the ring buffer's contents after printing Sets console logging level Uses a buffer of size SIZE Searches input files for lines that match a given pattern. The syntax is fgrep . Note that fgrep is the same as "grep -F". Configuring the PPP Protocol The Point to Point protocol (PPP) is a fast and efficient two-way networking protocol designed for using TCP/IP over serial lines. The system administrator needs to configure the pppd daemon and the chat routine to dial the number to operate correctly with your serial modem. pppd [ tty_name ] [ speed ] [ options ] The following table provides descriptions for the above variables. Variable [tty_name] Description Communicate over the named device. The string /dev/ is prepended if necessary. If no device name is given, or if the name of the terminal connected to the standard input is given, pppd will use that terminal, and will not fork to put itself in the background. A value for this option from a privileged source cannot be overridden by a non-privileged user. 16