我正在尝试使用 Sierra HL7690 在 4G 中与 PPPD 建立工作连接。
每次我启动 PPPD 时，都会出现“无运营商”或调制解调器挂断的情况。
我使用的顺序如下：
重置调制解调器 设置上下文：AT + CGDCONT = 1，“IP”，“internet.sierrawireless.com” 等待系统注册 使用以下参数启动 pppd：
pppd /dev/ttyACM2 115200 debug kdebug 1 nodetach noauth defaultroute usepeerdns deflate 15 noipx nomagic nopcomp noaccomp connect 'chat -v "ABORT" "BUSY" "ABORT" "NO CARRIER" "ABORT" "ERROR" "" "ATZ" "OK" "AT+CGDCONT=1,\"IP\",\"internet.sierrawireless.com\"" "OK" "ATDT*99***1#" "CONNECT"'*
我得到了以下结果：
Apr 26 13:21:07 sdn-ip-spt daemon.info pppd[1407]: Serial connection established.
Apr 26 13:21:07 sdn-ip-spt daemon.debug pppd[1407]: using channel 3
Apr 26 13:21:07 sdn-ip-spt daemon.info pppd[1407]: Using interface ppp0
Apr 26 13:21:07 sdn-ip-spt daemon.notice pppd[1407]: Connect: ppp0 <--> /dev/ttyACM2
Apr 26 13:21:08 sdn-ip-spt daemon.debug pppd[1407]: <lcp> 01 01 00 0a 02 06 00 00 00 00
Apr 26 13:21:08 sdn-ip-spt daemon.debug pppd[1407]: sent [LCP ConfReq id=0x1 <asyncmap 0x0>]
Apr 26 13:21:08 sdn-ip-spt daemon.debug pppd[1407]: <lcp> 01 01 00 14 02 06 00 00 00 00 05 06 86 02 da 91 07 02 08 02
Apr 26 13:21:08 sdn-ip-spt daemon.debug pppd[1407]: rcvd [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0x8602da91> <pcomp> <accomp>]
Apr 26 13:21:08 sdn-ip-spt daemon.debug pppd[1407]: <lcp> 04 01 00 0e 05 06 86 02 da 91 07 02 08 02
Apr 26 13:21:08 sdn-ip-spt daemon.debug pppd[1407]: sent [LCP ConfRej id=0x1 <magic 0x8602da91> <pcomp> <accomp>]
Apr 26 13:21:08 sdn-ip-spt daemon.debug pppd[1407]: <lcp> 02 01 00 0a 02 06 00 00 00 00
Apr 26 13:21:08 sdn-ip-spt daemon.debug pppd[1407]: rcvd [LCP ConfAck id=0x1 <asyncmap 0x0>]
Apr 26 13:21:08 sdn-ip-spt daemon.debug pppd[1407]: <lcp> 01 02 00 0a 02 06 00 00 00 00
Apr 26 13:21:08 sdn-ip-spt daemon.debug pppd[1407]: rcvd [LCP ConfReq id=0x2 <asyncmap 0x0>]
Apr 26 13:21:08 sdn-ip-spt daemon.debug pppd[1407]: <lcp> 02 02 00 0a 02 06 00 00 00 00
Apr 26 13:21:08 sdn-ip-spt daemon.debug pppd[1407]: sent [LCP ConfAck id=0x2 <asyncmap 0x0>]
Apr 26 13:21:08 sdn-ip-spt daemon.debug pppd[1407]: <ccp> 01 01 00 0f 1a 04 78 00 18 04 78 00 15 03 2f
Apr 26 13:21:08 sdn-ip-spt daemon.debug pppd[1407]: sent [CCP ConfReq id=0x1 <deflate 15> <deflate(old#) 15> <bsd v1 15>]
Apr 26 13:21:08 sdn-ip-spt daemon.debug pppd[1407]: <ipcp> 01 01 00 1c 02 06 00 2d 0f 01 03 06 00 00 00 00 81 06 00 00 00 00 83 06 00 00 00 00
Apr 26 13:21:08 sdn-ip-spt daemon.debug pppd[1407]: sent [IPCP ConfReq id=0x1 <compress VJ 0f 01> <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-dns2 0.0.0.0>]
Apr 26 13:21:08 sdn-ip-spt daemon.debug pppd[1407]: <lcp> 08 03 00 13 80 fd 80 fd 01 01 00 0f 1a 04 78 00 18 04 78
Apr 26 13:21:08 sdn-ip-spt daemon.debug pppd[1407]: rcvd [LCP ProtRej id=0x3 80 fd 80 fd 01 01 00 0f 1a 04 78 00 18 04 78]
Apr 26 13:21:08 sdn-ip-spt daemon.debug pppd[1407]: Protocol-Reject for 'Compression Control Protocol' (0x80fd) received
Apr 26 13:21:08 sdn-ip-spt daemon.debug pppd[1407]: <ipcp> 01 01 00 04
Apr 26 13:21:08 sdn-ip-spt daemon.debug pppd[1407]: rcvd [IPCP ConfReq id=0x1]
Apr 26 13:21:08 sdn-ip-spt daemon.debug pppd[1407]: <ipcp> 03 01 00 0a 03 06 00 00 00 00
Apr 26 13:21:08 sdn-ip-spt daemon.debug pppd[1407]: sent [IPCP ConfNak id=0x1 <addr 0.0.0.0>]
Apr 26 13:21:08 sdn-ip-spt daemon.debug pppd[1407]: <ipcp> 04 01 00 10 02 06 00 2d 0f 01 03 06 00 00 00 00
Apr 26 13:21:08 sdn-ip-spt daemon.debug pppd[1407]: rcvd [IPCP ConfRej id=0x1 <compress VJ 0f 01> <addr 0.0.0.0>]
Apr 26 13:21:08 sdn-ip-spt daemon.debug pppd[1407]: <ipcp> 01 02 00 1a 01 0a 00 00 00 00 00 00 00 00 81 06 00 00 00 00 83 06 00 00 00 00
Apr 26 13:21:08 sdn-ip-spt daemon.debug pppd[1407]: sent [IPCP ConfReq id=0x2 <addrs 0.0.0.0 0.0.0.0> <ms-dns1 0.0.0.0> <ms-dns2 0.0.0.0>]
Apr 26 13:21:08 sdn-ip-spt daemon.debug pppd[1407]: <ipcp> 01 02 00 04
Apr 26 13:21:08 sdn-ip-spt daemon.debug pppd[1407]: rcvd [IPCP ConfReq id=0x2]
Apr 26 13:21:08 sdn-ip-spt daemon.debug pppd[1407]: <ipcp> 02 02 00 04
Apr 26 13:21:08 sdn-ip-spt daemon.debug pppd[1407]: sent [IPCP ConfAck id=0x2]
Apr 26 13:21:08 sdn-ip-spt daemon.debug pppd[1407]: <ipcp> 04 02 00 0e 01 0a 00 00 00 00 00 00 00 00
Apr 26 13:21:08 sdn-ip-spt daemon.debug pppd[1407]: rcvd [IPCP ConfRej id=0x2 <addrs 0.0.0.0 0.0.0.0>]
Apr 26 13:21:08 sdn-ip-spt daemon.debug pppd[1407]: <ipcp> 01 03 00 10 81 06 00 00 00 00 83 06 00 00 00 00
Apr 26 13:21:08 sdn-ip-spt daemon.debug pppd[1407]: sent [IPCP ConfReq id=0x3 <ms-dns1 0.0.0.0> <ms-dns2 0.0.0.0>]
Apr 26 13:21:08 sdn-ip-spt daemon.debug pppd[1407]: <ipcp> 03 03 00 10 81 06 08 08 08 08 83 06 04 02 02 02
Apr 26 13:21:08 sdn-ip-spt daemon.debug pppd[1407]: rcvd [IPCP ConfNak id=0x3 <ms-dns1 8.8.8.8> <ms-dns2 4.2.2.2>]
Apr 26 13:21:08 sdn-ip-spt daemon.debug pppd[1407]: <ipcp> 01 04 00 10 81 06 08 08 08 08 83 06 04 02 02 02
Apr 26 13:21:08 sdn-ip-spt daemon.debug pppd[1407]: sent [IPCP ConfReq id=0x4 <ms-dns1 8.8.8.8> <ms-dns2 4.2.2.2>]
Apr 26 13:21:09 sdn-ip-spt daemon.notice pppd[1407]: Modem hangup
Apr 26 13:21:09 sdn-ip-spt daemon.notice pppd[1407]: Connection terminated.
Apr 26 13:21:10 sdn-ip-spt daemon.info pppd[1407]: Exit.
Linux: Linux sdn-ip-spt 3.14.49
pppd 配置（来自 dump 命令）
debug # (from command line)
kdebug 1 # (from command line)
nodetach # (from command line)
dump # (from command line)
noauth # (from command line)
/dev/ttyACM2 # (from command line)
115200 # (from command line)
lock # (from /etc/ppp/options)
connect chat -v \"ABORT\" \"BUSY\" \"ABORT\" \"NO CARRIER\" \"ABORT\" \"ERROR\" \"\" \"ATZ\" \"OK\" \"OK\" \"ATDT*99***1#\" \"CONNECT\" # (from command line)
crtscts # (from /etc/ppp/options)
modem # (from /etc/ppp/options)
noaccomp # (from command line)
asyncmap 0 # (from /etc/ppp/options)
nomagic # (from command line)
nopcomp # (from command line)
lcp-echo-failure 4 # (from /etc/ppp/options)
lcp-echo-interval 30 # (from /etc/ppp/options)
hide-password # (from /etc/ppp/options)
defaultroute # (from command line)
proxyarp # (from /etc/ppp/options)
usepeerdns # (from command line)
deflate 15 # (from command line)
noipx # (from command line)
丙二醛：v1.4.7
调制解调器 ：RHL769x.2.23.172400.201706231140.x7120m_1
SIM 卡：Sierra airvantage（智能 SIM）
答案1
我找到了一些解决方法。诀窍是使用 PDP 上下文 2 而不是 PDP 上下文 1。
更改命令：
pppd /dev/ttyACM2 115200 debug kdebug 1 nodetach noauth defaultroute usepeerdns deflate 15 noipx nomagic nopcomp noaccomp connect 'chat -v “中止” “忙” “中止” “无运营商” “中止” “错误” “” “ATZ” “确定”“在+CGDCONT = 2,\"IP\",\"internet.sierrawireless.com\"" "确定"“ATDT*99***2#”“连接”'*
显然，问题出在 LTE 网络检索 IP 地址的新方法上。此功能使用 PDP 上下文 1。由于某种原因，CHAT 脚本与我使用的调制解调器之间存在冲突，这导致了错误。使用 PDP 上下文 2 的解决方法可以避免这种冲突。