ThinkCore W311/321/341 Linux User’s Manual
Managing Communications
4-13
optional.
#pppd connect ‘chat -v “ “ ATDT5551212 CONNECT ogin:
username
word:
password
’
/dev/ttyM0 115200 debug crtscts modem defaultroute
If the PPP server does not prompt for the username and password, the command should be entered
as follows. Replace
username
with the correct username and replace
password
with the correct
password.
#pppd connect ‘chat -v “ “ ATDT5551212 CONNECT ‘user
username
password
password
/dev/ttyM0 115200 crtscts modem
The pppd options are described below:
connect ‘chat etc...’
This option gives the command to contact the PPP server. The ‘chat’ program is used to dial a
remote computer. The entire command is enclosed in single quotes because pppd expects a
one-word argument for the ‘connect’ option. The options for ‘chat’ are given below:
-v
verbose mode; log what we do to syslog
“ “
“ “
“ “
Double quotes—don’t wait for a prompt, but instead do ... (note that you must include a space
after the second quotation mark)
ATDT5551212
Dial the modem, and then ...
CONNECT
Wait for an answer.
“ “
Send a return (null text followed by the usual return)
ogin:
username
word:
password
Log in with
username
and
password
.
Refer to the chat man page, chat.8, for more information about the chat utility.
/dev/
Specify the callout serial port.
115200
The baudrate.
debug
Log status in syslog.
crtscts
Use hardware flow control between computer and modem (at 115200 this is a must).
modem
Indicates that this is a modem device; pppd will hang up the phone before and after making the
call.
defaultroute
Once the PPP link is established, make it the default route; if you have a PPP link to the Internet,
this is probably what you want.
192.1.1.17
This is a degenerate case of a general option of the form x.x.x.x:y.y.y.y. Here x.x.x.x is the local IP
address and y.y.y.y is the IP address of the remote end of the PPP connection. If this option is not
specified, or if just one side is specified, then x.x.x.x defaults to the IP address associated with the
local machine’s hostname (located in
/etc/hosts
), and y.y.y.y is determined by the remote machine.
