【Problem Description】: AR509 with using 2 SIM to connect ISP (the fix IP is provided by carrier with VPN tunnel)
【Problem Analysis】:check the APN setting and interface configuration .
[Huawei-Cellular0/0/0]dis cell 0/0/0 all
Modem State:
Hardware Information.
=====================
Model = ME909s-120
Modem Type = LTE module
Modem Firmware Version = 11.617.07.10.00
Hardware Version = RM1ME909ASM
Integrate circuit card identity (ICCID) = 8985200012746697744
International Mobile Subscriber Identity (IMSI) = 454003074669774
Mobile Station International ISDN Number (MSISDN) = None
International Mobile Equipment Identity (IMEI) = 867377026501142
Factory Serial Number (FSN) = VVQDU18825002113
Modem Status = Online
Profile Information.
====================
Profile 1 = ACTIVE
--------
PDP Type = IPv4, Header Compression = OFF
Data Compression = OFF
Packet Session Status = Inactive
* - Default profile
Network Information.
====================
Current Service Status = Emergency
Service Domain = Combined
Current Service = Invalid
Packet Service = Detached
Packet Session Status = Inactive
Network Selection Mode = Automatic
Network Connection Mode = Automatic
Current Network Connection = WCDMA(WCDMA)
Upstream Bandwidth = 384kbps
Downstream Bandwidth = 384kbps
Radio Information.
Current Bands : AUTO
Current RSSI = -87 dBm (weakl)
Current RSCP = -84 dBm
Current ECIO = -8 dB
Bands supported :
GSM: GSM850 GSM900 GSM1800 GSM1900
WCDMA: WCDMA850 WCDMA900 WCDMA2100 WCDMA1900
FDD LTE: B1 B2 B3 B4 B5 B7 B8 B20
Modem Security Information.
===========================
SIM ID = 1
PIN Verification = Disabled
PIN Status = Ready // SIM card status is ok , but the cellular cannot be up .
Number of Retries remaining = 3
SIM Status = OK
[F12_AR1220-Cellular0/0/0]modem reboot
Warning: The 3G/LTE module will reboot. Continue? [Y/N]:y
【Root Cause】: The 4G signal of the location where the client device is stored is weak. After the customer places the device on the window and restarts the 4G module, the signal can be received normally.
interface Cellular0/0/0
tcp adjust-mss 1200
dialer enable-circular
dialer-group 1
apn-profile 1010
dialer timer autodial 20
dialer number *99# autodial
ip address negotiate