2N NetStar Hardware manual - Manual (Page 40)

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2.14 UMTS card
The UMTS card can be supplies in several HW configurations.
Configuration with 2 or 4 UMTS ports (channels)
The UMTS card is equipped with antenna splitter.
An antenna must be connected to the SMA antenna connection; otherwise UMTS
module damage may occur.
The exchange of the SIM card in the UMTS modules is only allowed if the card
power supply is switched off, i.e. if the system is switched to the maintenance
mode or completely switched off.
1x SIM for 1 UMTS module is supported
The card is installed into any line position of the basic or the extension modules.
UMTS module
Module type – SIERRA WIRELESS MC8795V
SIM
SIM card type – SIM small 3V