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iSG4F
User’s Manual
iS5 Communications Inc.
144
STATIC IP assigned to it.
The Hub will listen on its interface to NHRP requests from the spoke and will allow the VPN
establishment dependent on the authentication.
A Hub must have a fixed connection to the network. It may not be connected with the cellular
modem as a spoke.
25.2.1
SIM card state
The modem can occupy 2 different SIMs. The SIMs may be of the same vendor or not.
At a given moment a connection can be available via a single SIM.
Redundancy can be achieved using RSSI measurements and echo tests to determine which
SIM is preferred to be used.
The user can select a certain SIM as preferred for default connection.
Each SIM can be individually configured and enabled /disabled.
Dependent on configuration and availability, the status of a SIM may be one of the following
at the modem:
Unknown – SIM is either:
o
Not available at the slot
o
Cellular modem is not enabled
o
Cellular modem in under refresh state
o
Modem malfunction
Disabled – The modem is enabled but the SIM was not configured.