Download W315A/325A Linux User`s Manual

W315A/325A Linux User's Manual
Managing Communications
“ “
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.
Example 2: Connecting to a PPP server over a hard-wired link
If a username and password are not required, use the following command (note that noipdefault is optional):
#pppd connect ‘chat –v“ “ “ “ ‘ noipdefault /dev/ttyM0 19200 crtscts
If a username and password is required, use the following command (note that noipdefault is optional, and root
is both the username and password):
#pppd connect ‘chat –v“ “ “ “ ‘ user root password root noipdefault
/dev/ttyM0 19200 crtscts
How to Check the Connection
Once you’ve set up a PPP connection, there are some steps you can take to test the connection. First, type:
#ifconfig
You should be able to see all the network interfaces that are UP. ppp0 should be one of them, and you should
recognize the first IP address as your own, and the “P-t-P address” (or point-to-point address) the address of
your server. Here’s what it looks like on one machine:
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