MSR810-LMS 4G路由器，隻要出現如下debug信息4G網絡就非常不穩定

使用MSR810-LMS路由器通過電信4G SIM卡和總部組L2TP VPN網絡，其它20多台路由器配置都是相同的並且都正常，唯獨有一台時好時壞，出問題的時候ping總部延遲非常高，丟包嚴重，基本ping幾下就要丟幾個包。debug信息和設備信息如下，請問這種情況是設備本身有問題還是信號的問題？

用debugging celluer plugin error命令手機debug信息，發現有問題的時候debug信息如下：

這個時候ping總部情況：

而正常的時候debug信息如下：

設備的信息：

SIM卡信號強度如下：

這個是信號強度<Daizhuang>dis cellular 1/0

Cellular1/0:

 Modem State: 

  Hardware Information:

    Model: U9300C DGNC 

    Manufacturer: LONGSUNG 

    Modem Firmware Version: QB32301.1.0.MX11(0125_3.0.1_L0817) 

    International Mobile Equipment Identity (IMEI): 863930056467503 

    International Mobile Subscriber Identity (IMSI): 460113489478852 

    Mobile Equipment Identifier (MEID): 99001678604229 

    Hardware Version: 10000 

    Factory Serial Number (FSN): 60000768G10211CE03806 

    Modem Status: Online

    Modem Status: IPv4 Active.

    Modem Status: IPv6 Unkown.

  Profile Information:

    Profile index: 1  

      PDP Type: IPv4v6

      Header Compression: Off

      Data Compression: Off

      Access Point Name (APN): ctnet 

      Authentication: NONE

  * - Default profile

  Network Information: 

    Current Service Status: Service Available

    Registration Status: Registered

    Current Service: Packet-switched 

    Current Roaming Status: Home 

    Current Data Bearer Technology: LTE 

    Network Selection Mode: Automatic

    Current IP address Mode: Cellular-alloc 

    Current IPV6 address Mode: Unknown 

    Mobile Network Name: CHN-CT 

    Mobile Country Code (MCC): 460 

    Mobile Network Code (MNC): 11 

    Location Area Code (LAC): 65534 

    Tracking Area Code(TAC): 56486 

    Cell ID: 159542547 

  Radio Information:

    Technology Preference: No preference specified (AUTO)

    Technology Selected: LTE 

    Configured LTE Band: 1,3,5,8,34,38,39,40,41

  LTE related info:

    Current RSSI: -63 dBm 

    Current RSRQ: -20 dB 

    Current RSRP: -101 dBm 

    Current SNR: -2 dB 

    Tx Power: Invalid

    Active Band: E-UTRA Operating Band 5 

  Modem Security Information:

    PIN Verification: Disabled

    PIN Status: PIN Requirement Disabled

    Number of PIN Retries Remaining: 3

    Number of PUK Retries Remaining: 10

    SIM Status: OK

        ICCID: 89861123234049586999 

  Error Information:

    IPv4 dialing failed: 0x00: No error in the request