To install a terminal with the standard COM serial lines or with serial expansion cards:
Most terminals will be connected directly to the computer using a cable, although it is possible for terminals to connect to the system via a modem link. DTE-type terminals connected directly to a DTE-type serial port, or DCE-type terminals connected directly to a DCE-type serial port require a cable in which the Transmit Data (TD) pin on the serial port is connected to the Receive Data (RD) pin on the terminal, the RD pin on the serial port is connected to TD pin on the terminal, and the Signal Ground (SG) wire is connected straight through.
DCE-type terminals connected to a DTE-type serial port, or DTE-type terminals connected to a DCE-type serial port require a cable in which these three wires are connected straight-through.
It may also be necessary to link the Data Set Ready (DSR), Data Terminal Ready (DTR), and Carrier Detect (CD) pins in the connector at the computer-end of the cable if the serial port hardware requires this. If software flow control is used, the operating system requires only that pins 2, 3, and 7 are connected for DB25 connectors, and that pins 2, 3, and 5 are connected for DB9 connectors.
For more information, see the serial(HW) manual page.
The enable command starts a getty process
that displays the
login: prompt on your terminal.
Se2a:234:respawn:/etc/getty tty2a mThe /etc/inittab entry should appear as above. If the entry does not look like this example, edit the file to correct it. See inittab(F) for information on the /etc/inittab format.
The last field in the /etc/inittab entry is a line-mode label from an entry in the /etc/gettydefs file. In the example above, ``m'' corresponds to the 9600bps entry in /etc/gettydefs. The maximum speeds that the serial driver supports depends on the characteristics of the underlying serial port hardware as shown in ``Serial port speeds, line-mode labels, and UART limitations''. For more information, see ``Changing default terminal line characteristics''.
login:prompt appears. If so, you are ready to log in. If the prompt does not appear, see ``Testing a terminal connection''.