某局点MSR810-W-LM 4G 拨号失败问题处理经验案例

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某局点采用我司MSR810-W-LM 4G拨号上网，但是设备插入4G卡之后，配置完成，发现无法拨号成功，把卡拿到手机上测试，发现能正常使用，说明卡没欠费，是使用正常的，怀疑设备侧有问题，指导客户收集信息反馈。

查看设备配置并无异常，收集dis celler 查看SIM卡状态，发现SIM卡显未没插入，怀疑是物理安装问题，指导客户断电重新插拔测试。

注意：SIM不支持热插拔

<H3C>dis cellular 1/0
Cellular1/0:
 Modem State:
  Hardware Information:
    Model: U8300C
    Manufacturer: LONGSUNG
    Modem Firmware Version: QA30002.1.6_MV11(4534_1.2.3_L0801)
    International Mobile Equipment Identity (IMEI): 869751028285938
    Mobile Equipment Identifier (MEID): A100005B1C5940
    Hardware Version: 30000
    Modem Status: Online
    Modem Status: IPv4 Unkown.
    Modem Status: IPv6 Unkown.
  Profile Information:
    Profile index: 1 
      PDP Type: IPv4v6
      Header Compression: Off
      Data Compression: Off
      Access Point Name (APN): CMIOTHZZJBCCMCC.ZJ
      Authentication: NONE
  * - Default profile
  Network Information:
    Current Service Status: Limited
    Registration Status: Searching
    Current Roaming Status: Roaming
    Current Data Bearer Technology: Unknown
    Network Selection Mode: Automatic
    Current IP address Mode: Cellular-alloc
    Current IPV6 address Mode: Unknown
    Mobile Country Code (MCC): 460
    Mobile Network Code (MNC): 01
  Radio Information:
    Technology Preference: No preference specified (AUTO)
    Technology Selected: UMTS
    Configured LTE Band = 1,3,5,38,39,40,41
  WCDMA related info:
    Current RSSI: -72 dBm
    Current ECIO: -4 dBm
  Modem Security Information:
    PIN Verification: Unknown
    PIN Status: Not Initialized
    SIM Status: Not Inserted
  Error Information:

最终确认是安装问题，SIM卡和卡槽接触不好，垫一张小纸片之后，重新插入，问题解决，4G拨号成功。