我在Linux下面使用pppd拨号，想让cdma modem连上Internet，但是连接到了pap验证的时候就会出错，如下： sent [LCP ConfReq id=0x1 <mru 1600> <asyncmap 0xa0000> <auth pap> <pcomp> <accomp>] sent [LCP ConfReq id=0x1 <mru 1600> <asyncmap 0xa0000> <auth pap> <pcomp> <accomp>] rcvd [LCP ConfReq id=0x1 <mru 1600> <asyncmap 0xa0000> <auth pap> <pcomp> <accomp>] sent [LCP ConfAck id=0x1 <mru 1600> <asyncmap 0xa0000> <auth pap> <pcomp> <accomp>] rcvd [LCP ConfAck id=0x1 <mru 1600> <asyncmap 0xa0000> <auth pap> <pcomp> <accomp>] sent [PAP AuthReq id=0x1 user="CARD" password="CARD"] sent [PAP AuthReq id=0x2 user="CARD" password="CARD"] sent [PAP AuthReq id=0x3 user="CARD" password="CARD"] sent [PAP AuthReq id=0x4 user="CARD" password="CARD"] sent [PAP AuthReq id=0x5 user="CARD" password="CARD"] sent [PAP AuthReq id=0x6 user="CARD" password="CARD"] sent [PAP AuthReq id=0x7 user="CARD" password="CARD"] sent [PAP AuthReq id=0x8 user="CARD" password="CARD"] sent [PAP AuthReq id=0x9 user="CARD" password="CARD"] sent [PAP AuthReq id=0xa user="CARD" password="CARD"] sent [LCP TermReq id=0x2 "Authentication failed"] rcvd [LCP TermReq id=0x2 "Authentication failed"] sent [LCP TermAck id=0x2] rcvd [LCP TermAck id=0x2] Connection terminated. Sending break to the modem PDP context detached Serial link disconnected. ----------------------------------------------------- 感觉是收不到pap验证的回复数据包，如果不使用pap验证的话，就会显示如 sent [IPCP ConfReq id=0x1 <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-dns3 0.0.0.0>] sent [IPCP ConfReq id=0x1 <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-dns3 0.0.0.0>] 这样的信息，然后模块收不到任何消息，过一会儿就超时了。我用的是WAVECOM Q2358C cdma modem, 在windows下面使用拨号网络能够连上Internet. 这个问题困扰我好几天了，还是没有任何进展，请高人指点。谢谢！