RK3399 Ubuntu EC20 调试流程

asngage

现在可以生成wwan0。键入systemctl status ec20.service查看状态，发现反复重连，报错如下：
ec20.service - Quectel networking service
   Loaded: loaded (/lib/systemd/system/ec20.service; disabled; vendor preset: en
abled)
   Active: active (running) since Tue 2019-01-15 05:44:52 UTC; 4min 1
s ago
Main PID: 1512 (quectel-CM)
   CGroup: /system.slice/ec20.service
           鈹斺攢1512 /usr/local/bin/quectel-CM

Jan 15 05:47:24 firefly quectel-CM[1512]: [01-15_05:46:52:499] requestQueryDataC
all ConnectionStatus: DISCONNECTED
Jan 15 05:47:24 firefly quectel-CM[1512]: [01-15_05:46:52:532] requestRegistrati
onState2 MCC: 460, MNC: 0, PS: Attached, DataCap: LTE
Jan 15 05:47:24 firefly quectel-CM[1512]: [01-15_05:46:52:755] requestSetupDataC
all WdsConnectionIPv4Handle: 0x86ad7c40
Jan 15 05:47:24 firefly quectel-CM[1512]: [01-15_05:46:52:819] requestQueryDataC
all ConnectionStatus: CONNECTED
Jan 15 05:47:24 firefly quectel-CM[1512]: [01-15_05:47:08:243] requestQueryDataC
all ConnectionStatus: DISCONNECTED
Jan 15 05:47:24 firefly quectel-CM[1512]: [01-15_05:47:08:275] requestRegistrati
onState2 MCC: 460, MNC: 0, PS: Attached, DataCap: LTE
Jan 15 05:47:24 firefly quectel-CM[1512]: [01-15_05:47:08:499] requestSetupDataC
all WdsConnectionIPv4Handle: 0x86ad7c40
Jan 15 05:47:24 firefly quectel-CM[1512]: [01-15_05:47:08:563] requestQueryDataC
all ConnectionStatus: CONNECTED
Jan 15 05:47:24 firefly quectel-CM[1512]: [01-15_05:47:24:115] requestQueryDataC
all ConnectionStatus: DISCONNECTED
Jan 15 05:47:24 firefly quectel-CM[1512]: [01-15_05:47:24:147] requestRegistrati
onState2 MCC: 460, MNC: 0, PS: Attached, DataCap: LTE
有调通的同学可以指导一下吗？