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WRTB1
XX
wrtb1xx_g_en_105
30/42
8.3. LTE
Modems are used for connection to network of mobile providers. 2G
/3G /4G
standards are supported. Router provides up to 4 modems.
Each modem is fitted with 2 SMA connectors for antenna. Connectors X21,
X23, X25 and X27 are used pro primary antenna connection, connectors X22,
X24, X26 and X28 are used for diversity antenna connection.
Fig. 17 - Location of LEDs and connectors for LTE
8.3.1
SIM
For each LTE modem there are up to 4 slots for SIM cards available (marked as
A, B, C and D), number depends on the variant of router.
Multiple SIM cards are used for switching operators during international
operation of railway vehicle.
D
B
A
C
Fig. 18 - Location and marking of SIM card slots
8.3.2
LTE state indication
LTE state is indicated by LEDs located close to SMA antenna connector.
LED
Status
Meaning
LNK
OFF
LTE is not active
ON
LTE connected
ACT
Blink
Running communication
OFF
No communication
Meaning
of LED