我想在Linux中用脚本实现ppp拨号上网，使用的是外置的串口无线GSM MODEM，出现如下日志提示：Mar 21 20:35:37 localhost pppd[14795]: pppd 2.4.1 started by root, uid 0Mar 21 20:35:38 localhost chat[14796]: timeout set to 3 secondsMar 21 20:35:38 localhost chat[14796]: abort on (/nBUSY/r)Mar 21 20:35:38 localhost chat[14796]: abort on (/nNO ANSWER/r)Mar 21 20:35:38 localhost chat[14796]: abort on (/nRINGING/r/n/r/nRINGING/r)Mar 21 20:35:38 localhost chat[14796]: send (rAT^M)Mar 21 20:35:39 localhost chat[14796]: expect (OK)Mar 21 20:35:39 localhost chat[14796]: rAT^M^MMar 21 20:35:39 localhost chat[14796]: OKMar 21 20:35:39 localhost chat[14796]: -- got itMar 21 20:35:39 localhost chat[14796]: send (ATH0^M)Mar 21 20:35:39 localhost chat[14796]: timeout set to 30 secondsMar 21 20:35:39 localhost chat[14796]: expect (OK)Mar 21 20:35:39 localhost chat[14796]: ^MMar 21 20:35:39 localhost chat[14796]: ATH0^M^MMar 21 20:35:39 localhost chat[14796]: OKMar 21 20:35:39 localhost chat[14796]: -- got itMar 21 20:35:39 localhost chat[14796]: send (ATDT*99***1#^M)Mar 21 20:35:39 localhost chat[14796]: expect (CONNECT)Mar 21 20:35:39 localhost chat[14796]: ^MMar 21 20:35:39 localhost chat[14796]: ATDT*99***1#^M^MMar 21 20:35:39 localhost chat[14796]: CONNECTMar 21 20:35:39 localhost chat[14796]: -- got itMar 21 20:35:39 localhost chat[14796]: send (^M)Mar 21 20:35:39 localhost chat[14796]: expect (ogin:)Mar 21 20:35:39 localhost chat[14796]: 9600^MMar 21 20:35:42 localhost chat[14796]: ~^?}#@!}!}!} }6}!}$}%/}"}&} } } } }'}"}(}"}#}$@#&4~~^?}#@!}!}!} }6}!}$}%/}"}&} } }Mar 21 20:35:48 localhost chat[14796]: } }'}"}(}"}#}$@#&4~~^?}#@!}!}!} }6}!}$}%/}"}&} } } } }'}"}(}"}#}$@#&4~~^?}#@!}!}!Mar 21 20:35:51 localhost chat[14796]: } }6}!}$}%/}"}&} } } } }'}"}(}"}#}$@#&4~~^?}#@!}!}!} }6}!}$}%/}"}&} } } } }'}"}(}Mar 21 20:35:57 localhost chat[14796]: "}#}$@#&4~~^?}#@!}!}!} }6}!}$}%/}"}&} } } } }'}"}(}"}#}$@#&4~~^?}#@!}!}!} }6}!}$}%Mar 21 20:36:00 localhost chat[14796]: /}"}&} } } } }'}"}(}"}#}$@#&4~~^?}#@!}!}!} }6}!}$}%/}"}&} } } } }'}"}(}"}#}$@#&4~Mar 21 20:36:06 localhost chat[14796]: ~^?}#@!}!}!} }6}!}$}%/}"}&} } } } }'}"}(}"}#}$@#&4~~^?}#@!}!}!} }6}!}$}%/}"}&} } }Mar 21 20:36:09 localhost chat[14796]: alarmMar 21 20:36:09 localhost chat[14796]: send (^M)Mar 21 20:36:09 localhost chat[14796]: expect (ogin:)Mar 21 20:36:10 localhost chat[14796]: ^MMar 21 20:36:10 localhost chat[14796]: NO CARRIER^MMar 21 20:36:39 localhost chat[14796]: alarmMar 21 20:36:39 localhost chat[14796]: FailedMar 21 20:36:39 localhost pppd[14795]: Connect script failedMar 21 20:36:40 localhost pppd[14795]: Exit
貌似是说在验证用户名的时候出现了错误，我在脚本中的用户名和密码都设置为空，不知道正不正确，如果不正确应该如何设置？希望高手能解答一下
