这几天做了一下gprs拨号上网,模块是西门子的mc39i。我的系统是fedora core 6。其实很简单,我又有高手指导,:-)。 首先从/usr/share/doc/ppp-2.4.4/scripts中cp ppp-on,ppp-off,ppp-on-dialer三个脚本到/home/a/ppp。然后做如下修改: 在ppp-on里
1.改电话号码为*99***1#
2.将账号与密码清除
3.修改DIALER_SCRIPT的路径为/home/a/ppp/ppp-on-dialer
4.把下设备改成/dev/ttyS0,速率改为115200 5.将crtscts参数去掉,
在ppp-on-dialer里把帐号密码那块去掉。 下面是对脚本的一些说明。当然都是网上搜来的了。:-) /home/a/ppp/ppp-on #!/bin/sh
#
# Script to initiate a ppp connection. This is the first part of the
# pair of scripts. This is not a secure pair of scripts as the codes
# are visible with the 'ps' command. However, it is simple.
#
# These are the parameters. Change as needed.
TELEPHONE=*99***1## The telephone number for the connection
ACCOUNT=# The account name for logon (as in 'George Burns')
PASSWORD=# The password for this account (and 'Gracie Allen')
LOCAL_IP=0.0.0.0# Local IP address if known. Dynamic = 0.0.0.0
REMOTE_IP=0.0.0.0# Remote IP address if desired. Normally 0.0.0.0
NETMASK=255.255.255.0# The proper netmask if needed
#
# Export them so that they will be available at 'ppp-on-dialer' time.
export TELEPHONE ACCOUNT PASSWORD
#
# This is the location of the script which dials the phone and logs
# in. Please use the absolute file name as the $PATH variable is not
# used on the connect option. (To do so on a 'root' account would be
# a security hole so don't ask.)
#
DIALER_SCRIPT=/home/a/ppp/ppp-on-dialer
#
# Initiate the connection
#
# I put most of the common options on this command. Please, don't
# forget the 'lock' option or some programs such as mgetty will not
# work. The asyncmap and escape will permit the PPP link to work with
# a telnet or rlogin connection. You are welcome to make any changes
# as desired. Don't use the 'defaultroute' option if you currently
# have a default route to an ethernet gateway.
#
exec /usr/sbin/pppd debug lock modem /dev/ttyS0 115200 \
asyncmap 20A0000 escape FF kdebug 0 $LOCAL_IP:$REMOTE_IP \
noipdefault netmask $NETMASK defaultroute connect $DIALER_SCRIPT
exec /usr/sbin/pppd debug lock modem /dev/ttyS0 115200 \
asyncmap 20A0000 escape FF kdebug 0 $LOCAL_IP:$REMOTE_IP \
noipdefault netmask $NETMASK defaultroute connect $DIALER_SCRIPT这个命令的作用是:(可以使用manpppd查看帮助)
运行/usr/sbin/pppd程序,给它传入命令行参数的意义是:
/dev/ttyS0:拨号所用的MODEM所连接的串口(ttyS0是串口1,ttyS1是串口2...)
115200:MODEM的通信速率(57600BPS)
modem :用MODEM进行拨号。
nocrtscts:无流控
lock :锁定这个设备
debug :输出调试信息
defaultroute :此拨号连接作为默认路由 connect /home/a/ppp/ppp-on-dialer:使用/home/a/ppp/ppp-on-dialer进行拨号
/home/a/ppp/ppp-on-dialer
#!/bin/sh
#
# This is part 2 of the ppp-on script. It will perform the connection
# protocol for the desired connection.
#
exec chat -v\
TIMEOUT3\
ABORT'\nBUSY\r'\
ABORT'\nNO ANSWER\r'\
ABORT'\nRINGING\r\n\r\nRINGING\r'\
''\rAT\
'OK-+++\c-OK'ATH0\
TIMEOUT30\
OKAT+IPR=115200\
OKAT+CGDCONT=1,"IP","CMNET"\
OKAT+CGACT=1,1\
OKATDT*99***1#\
CONNECT''\
#ogin:--ogin:$ACCOUNT\
#assword:$PASSWORD
chat命令的帮助请参考man-achat查看。
ABORTBUSY
ABORTERROR
ABORTNOCARRIER
ABORTNODIALTONE
ABORTRING
<--------如果遇到MODEM回应"BUSY","ERROR","NOCARRIER","NODIALTONE"则立即报错并退出拨号。
""AT
<--------外送"AT"命令。
OKAT+IPR=115200
<--------设置波特率。
"OK""AT+CGDCONT=1,“ip”,“cmnet”
<---当判到“OK"回应时,外送AT+CGDCONT=1,"ip","cmnet"命令。设置GPRS接人网关。其中CMNET为移动梦网的接人网关 OKAT+CGACT=1,1 <--------激活GPRS功能,如果返回OK,则GPRS连接成功;如果返回ERROR则意味着GPRS失败。这时候应该检查一下SIM卡的GPRS业务是否已经开通,GPRS模块天线是否安装正确等问题。
"OK""ATDT*99***1#" <---当判到“OK"回应时,外送拨号ATDT*99***1#命令。
"CONNECT" <---当判到“CONNECT"回应时,拨号结束,程序退出。
/home/a/ppp/ppp-off
#!/bin/sh
##############################################
# Determine the device to be terminated.
#
if [ "$1" = "" ]; then
DEVICE=ppp0
else
DEVICE=$1
fi ###############################################
# If the ppp0 pid file is present then the program is #running. Stop it.
if [ -r /var/run/$DEVICE.pid ]; then
kill -INT `cat /var/run/$DEVICE.pid`
#
# If the kill did not work then there is no process running for this
# pid. It may also mean that the lock file will be left. You may wish
# to delete the lock file at the same time.
if [ ! "$?" = "0" ]; then
rm -f /var/run/$DEVICE.pid
echo "ERROR: Removed stale pid file"
exit 1
fi
#
# Success. Let pppd clean up its own junk.
echo "PPP link to $DEVICE terminated."
exit 0
fi
#
# The ppp process is not running for ppp0
echo "ERROR: PPP link is not active on $DEVICE"
exit 1