User`s manual

User’s Manual
GSM35 18 RTD Finland Oy
Figure 3-4 below shows a picture of the external SIM card interface board.
Fig 3-4 ESIM2035 board
Note that the ESIM2035 is configured differently for the GSM20 and the
GSM35/GPRS35. The units are not interchangeable, the GSM35 and the
GPRS are identical in their SIM interfaces. Once the TC35 GSM modem
is able to initialise itself after power-up and correctly detect the SIM card
the green status LED will be lit. If the LED is not illuminated you can not
interface to your GSM modem. See Figure 3-3 for the location of the
“STAT” LED. The header/mounting holes immediately next to the LED can
be used to connect to an LED externally mounted to the enclosure wall for
example. The “STAT” LED will not indicate detection of the GSM field or
network access.
External SIM card interface J25
The figure 3-4 below shows the GSM35 external SIM card interface
header J25 that is used to connect to board the ESIM2035.
Fig 3-5 External SIM card header J25 available only on GSM35-2 boards