The Dual SIMs feature provides the following:

• A fail over mechanism in the event the primary SIM looses connectivity to one of the Mobile Service Provider networks. There is no automatic fall-back to the primary SIM, since a change only occurs when there is no signal from the carrier in use. A script is needed to reverse back to the primary. Both mobile provider networks must be supported by the given IR829 SKU, and it must be in an applicable region.

  • By default, SIM slot 0 is the primary, and SIM slot1 is the backup. Behavior may be changed using the lte sim primary command.

  • Profiles for each SIM are assigned by using the lte sim profile command. Each SIM has an associated Internet profile and an IMS profile in the CLI.

  • Dual-SIM behavior is managed under Cellular 0 CLI configuration.

  • The fail-overs happen when there is no signal from the current carrier, and generally happen depending on the fail-over timer value that is set. The default value is 2 minutes. The range is from 0-7 minutes.

• Dual active LTE radios providing Multi-carrier support for active and backup use cases. Newer cellular modems have been added (MC74xx) with FDD/TDD LTE on LA and EA 829 models.

  • New WiFi domains for APAC and LATAM

Note	The 7455 modems do not support dual SIM capabilities.

The following examples are of an IR800 cellular configuration using dual modems. A single modem example will look much the same, without the Cellular1/0 and Cellular1/1 entries.

DUAL-Modem> enable
DUAL-Modem# show ip int brief
Interface                  IP-Address      OK? Method Status                Protocol
GigabitEthernet0           unassigned      YES NVRAM  administratively down down    
GigabitEthernet1           unassigned      YES unset  down                  down    
GigabitEthernet2           unassigned      YES unset  down                  down    
GigabitEthernet3           unassigned      YES unset  down                  down    
GigabitEthernet4           unassigned      YES unset  down                  down    
Wlan-GigabitEthernet0      unassigned      YES unset  up                    up      
Async0                     unassigned      YES unset  up                    down    
Async1                     unassigned      YES unset  up                    down    
GigabitEthernet5           unassigned      YES NVRAM  administratively down down    
Cellular0/0                192.168.43.237  YES IPCP   up                    up      
Cellular1/0                10.61.25.231    YES IPCP   up                    up      
Second Modem
Cellular0/1                unassigned      YES TFTP   down                  down    
Cellular1/1                unassigned      YES TFTP   down                  down    
Second Modem
Vlan1                      unassigned      YES unset  up                    up      
wlan-ap0                   unassigned      YES NVRAM  up                    up      
DUAL-Modem# show running-config
 
Building configuration...
Current configuration : 4021 bytes
!
! Last configuration change at 18:31:06 UTC Mon Oct 24 2016
!
version 15.6
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
service internal
!
hostname DUAL-Modem
!
boot-start-marker
boot system flash:/ir800-universalk9-mz.SPA.156-3.M0a
boot-end-marker
!
no aaa new-model
ethernet lmi ce
service-module wlan-ap 0 bootimage autonomous
!
ignition off-timer 900
!
ignition undervoltage threshold 9
!
no ignition enable
!
no ip domain lookup
ip inspect WAAS flush-timeout 10
ip cef
no ipv6 cef
!
multilink bundle-name authenticated
!
chat-script lte "" "AT!CALL" TIMEOUT 20 "OK"
!
license udi pid IR829-2LTE-EA-BK9 sn FGL2032219N
!
redundancy
notification-timer 120000
controller Cellular 0
lte sim data-profile 3 attach-profile 1
   
    #When using Verizon, use data profile 3 and attach to profile 1
    #When using AT&T, use data profile 1 and attach to profile 1

lte modem link-recovery rssi onset-threshold -110
lte modem link-recovery monitor-timer 20
lte modem link-recovery wait-timer 10
lte modem link-recovery debounce-count 6
!
controller Cellular 1
lte modem link-recovery rssi onset-threshold -110
lte modem link-recovery monitor-timer 20
lte modem link-recovery wait-timer 10
lte modem link-recovery debounce-count 6
interface GigabitEthernet0
no ip address
shutdown
!
interface GigabitEthernet1
no ip address
!
interface GigabitEthernet2
no ip address
!
interface GigabitEthernet3
no ip address
!
interface GigabitEthernet4
no ip address
!
interface Wlan-GigabitEthernet0
no ip address
!
interface GigabitEthernet5
no ip address
shutdown
duplex auto
speed auto
!
interface Cellular0/0 
  #Both interfaces need to be configured in the IOS software

ip address negotiated
ip virtual-reassembly in
encapsulation slip
load-interval 30
dialer in-band
dialer string lte
dialer-group 1
no peer default ip address
async mode interactive
routing dynamic
!
interface Cellular1/0
  #Both interfaces need to be configured in the IOS software
ip address negotiated
ip virtual-reassembly in
encapsulation slip
load-interval 30
dialer in-band
dialer string lte
dialer-group 1
no peer default ip address
async mode interactive
routing dynamic
!
interface Cellular0/1
no ip address
encapsulation slip
!
interface Cellular1/1
no ip address
encapsulation slip
!
interface wlan-ap0
no ip address
!
interface Vlan1
no ip address
!
interface Async0
no ip address
encapsulation scada
!
interface Async1
no ip address
encapsulation scada
!
!
ip forward-protocol nd
!
no ip http server
no ip http secure-server
!
ip route 0.0.0.0 0.0.0.0 Cellular1/0
ip route 8.8.8.8 255.255.255.255 Cellular0/0
                  
Route values added
!
dialer-list 1 protocol ip permit
ipv6 ioam timestamp
!
access-list 1 permit any
!
control-plane
!
!
line con 0
stopbits 1
line 1 2
stopbits 1
line 3
script dialer lte
no exec
transport preferred lat pad telnet rlogin lapb-ta mop udptn v120 ssh
transport output lat pad telnet rlogin lapb-ta mop udptn v120 ssh
rxspeed 150000000
txspeed 50000000
line 4
no activation-character
no exec
transport preferred none
transport input all
transport output lat pad telnet rlogin lapb-ta mop udptn v120 ssh
l
ine 8
script dialer lte
no exec
transport preferred lat pad telnet rlogin lapb-ta mop udptn v120 ssh
transport output lat pad telnet rlogin lapb-ta mop udptn v120 ssh
rxspeed 150000000
txspeed 50000000
line 9
script dialer lte
no exec
transport preferred lat pad telnet rlogin lapb-ta mop udptn v120 ssh
transport input all
transport output lat pad telnet rlogin lapb-ta mop udptn v120 ssh
rxspeed 236800
txspeed 118000
line 15
no exec
transport preferred lat pad telnet rlogin lapb-ta mop udptn v120 ssh
transport output lat pad telnet rlogin lapb-ta mop udptn v120 ssh
rxspeed 236800
txspeed 118000
line 1/3 1/6
transport preferred none
transport output none
stopbits 1
line vty 0 4
login
transport input none
!
no scheduler max-task-time
!!
End

Test the modem configuration with a ping command:

DUAL-Modem# ping 8.8.8.8
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 8.8.8.8, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 30/88/292 ms
DUAL-Modem#

The following two examples show a Verizon profile followed by an AT&T profile.

IR800# show cell 0 hardware
Modem Firmware Version = SWI9X15C_05.05.58.00
Modem Firmware built = 2015/03/04 21:30:23
Hardware Version = 1.0
Device Model ID: MC7304
Package Identifier ID: 1102029_9903299_MC7304_05.05.58.00_00_Cisco_005.010_000
International Mobile Subscriber Identity (IMSI) = 208150103324395
International Mobile Equipment Identity (IMEI) = 352761060206340
Integrated Circuit Card ID (ICCID) = 8933150112100222053
Mobile Subscriber Integrated Services
Digital Network-Number (MSISDN) = 33695764790
Current Modem Temperature = 47 deg C
PRI SKU ID = 9903299, PRI version = 05.10, Carrier = 1

IR800# show cell 0 security
Active SIM = 0 	! 
SIM slot #0 active
SIM switchover attempts = 0
Card Holder Verification (CHV1) = Disabled
SIM Status = OK
SIM User Operation Required = None
Number of CHV1 Retries remaining = 3

IR800# cellular 0 lte sim unlock XXXX
     ! 
XXXX = PIN code

IR800# show cell 0 radio
Radio power mode = ON
Channel Number = 3037
Current Band = Unknown
Current RSSI(RSCP) = -99 dBm
Current ECIO = -10 dBm
Radio Access Technology(RAT) Preference = AUTO
Radio Access Technology(RAT) Selected = UMTS ( UMTS/WCDMA )

IR800# show cell 0 network
Current System Time = Sat Oct 10 9:12:59 2015
Current Service Status = Normal
Current Service = Packet switched
Current Roaming Status = Home
Network Selection Mode = Automatic
Network = LTE
Mobile Country Code (MCC) = 208
Mobile Network Code (MNC) = 15
Packet switch domain(PS) state = Attached
Location Area Code (LAC) = 3910
Cell ID = 222094374

IR800# show cell 0 all

Note	The output to the show cell 0 all command is extensive, and omitted from this guide for brevity.

Note	A password must be added to the line configuration for security.

Get the line number associated to Cellular 0:

IR800#show line
 Tty Line Typ   Tx/Rx   A Modem  Roty AccO AccI  Uses  Noise Overruns  In
 I   3    3 TTY  -       -        -    -    -     1      0    4/0      Ce0

Use one of the IR800 IP address along with 2000 + line number (2003)

IR800#10.15.15.1 2003
Trying 10.15.15.1, 2003 ... Open

Execute the 4G modem AT commands, for example AT!GSTATUS?:

AT!GSTATUS?
!GSTATUS: 
Current Time:  213353		Temperature: 38
Bootup Time:   0		Mode:        ONLINE         
System mode:   WCDMA      	PS state:    Attached     
WCDMA band:    WCDMA 900  
WCDMA channel: 3037
GMM (PS) state:REGISTERED     	NORMAL SERVICE 
MM (CS) state: IDLE           	NORMAL SERVICE 
WCDMA L1 state:L1M_PCH_SLEEP  	LAC:         0F46 (3910)
RRC state:   DISCONNECTED   	Cell ID:     0D3CE428 (222094376)
RxM RSSI C0:   -90		RxD RSSI C0: -106
RxM RSSI C1:   -106		RxD RSSI C1: -106

Disconnect using “SHIFT+CONTROL+6+x”, then confirm:

IR800#disc
Closing connection to 10.2.2.2 [confirm]enter
IR800#

To check the IR800 4G modem firmware, execute the 4G modem AT commands after connecting to the modem. The following example is for an IR809G-LTE-GA-K9 loaded with FW-MC7304-LTE-GB Global firmware.

Note	On the IR809, the PRI SKU ID= 9903299 is not representative of the GB firmware

at!priid?
PRI Part Number: 9903299
Revision: 05.10
Carrier PRI: 9999999_9902674_SWI9X15C_05.05.58.00_00_GENEU-4G_005.026_000
OK
at!package?
1102029_9903299_MC7304_05.05.58.00_00_Cisco_005.010_000
at!gobiimpref?
!GOBIIMPREF: 
 preferred fw version:   05.05.58.00
 preferred carrier name: GENEU-4G
 preferred config name:  GENEU-4G_005.026_000
 current fw version:     05.05.58.00
 current carrier name:   GENEU-4G
 current config name:    GENEU-4G_005.026_000