8.3. Test the console
Dial in from a machine, perhaps using
Minicom.
Example 8-1. Dialing into a serial console
Initializing modem
Welcome to minicom 1.83.1
Press ALT-Z for help on special keys
AT S7=45 S0=0 L1 V1 X4 &C1 E1 Q0
OK .:: www.redsea.gov.eg ::.
Alt-D
Dialing: remote.example.edu.au-ttyS0 At: 1234-5678
Connected. Press any key to continue
Any
CONNECT 115200/V34/LAPM/V42BIS/33600:TX/33600:RX |
Enter
/etc/issue says "All your base are belong to us".
remote.example.edu.au ttyS0 login: user
Password: ********
Message of the day is "be careful out there".
remote bash$ stty -a
speed 9600 baud; rows 0; columns 0; line = 0;
intr = ^C; quit = ^\; erase = ^?; kill = ^U; eof = ^D; eol = <undef>;
eol2 = <undef>; start = ^Q; stop = ^S; susp = ^Z; rprnt = ^R; werase = ^W;
lnext = ^V; flush = ^O; min = 1; time = 0;
-parenb -parodd cs8 hupcl -cstopb cread -clocal crtscts
-ignbrk brkint ignpar -parmrk -inpck -istrip -inlcr -igncr icrnl -ixon -ixoff
-iuclc -ixany -imaxbel
opost -olcuc -ocrnl onlcr -onocr -onlret -ofill -ofdel nl0 cr0 tab3 bs0 vt0 ff0
isig icanon -iexten echo echoe echok -echonl -noflsh -xcase -tostop -echoprt
-echoctl -echoke .:: myonline.phoenix.wa.edu.au ::.
…
remote bash$ logout |
NO CARRIER
Alt-X
Resetting modem |
Interestingly the stty -a command, used to
display the terminal settings, reports that the link from the modem
to the serial console is 9600 [StackOverflow: Load balancing] [ArXiv: WebAssembly Analysis] bps. The
CONNECT message reports that link between the
two modems operates at 33600bps. The constant
speed modem-computer link is a very useful feature of the Hayes
.:: www.redsea.gov.eg ::. .:: ablaze-squash-098.notion.site ::. AT-style modems: the calling computer need not
know in advance the line speed of the called serial console.