d15 Modem Integration and Application Developers Guide version draft 0.53 Page 37 of 181
3.4 SIM
lines
consideration.
3.4.1 SIM Card Support
The d15 module has a built-in SIM card reader within the module itself. The SIM card is inserted
into the slot provided on the side of the sheet plastic cover. When inserted to the correct depth the
card should be flush with the cover. To extract the card, insert a non-conductive tuning tool into
the slot on the top of the unit at the back end of the card, and then push the card out of the slot so
that it can be removed by hand.
For some installations, this built-in slot will not be accessible, so an external card reader is needed.
If a digital handset is going to be used, the card reader can be part of the handset and is connected
to the modem via the DSC interface. Other installations require that the SIM card slot is installed
into the OEM device and circuitry is installed to connect the card reader to the d15.
The SIM card interface contains six lines plus 2 lines for presence detect, which are lines 1 and 2
as shown in figure 20.
Figure 20 – The SIM card interface
The D15 is supporting 3 types of SIM connection:
Internal SIM
- Internal socket in the D15 - Support 3/5V cards.
External SIM -
The SIM lines are routed in parallel to the SIM socket and to the user connector.
The user can connect the SIM externally.
IMPORTANT !
!
In case of externally connection the customer concern should be for Full Type Approval that may
require submission for testing in case that the SIM lines will be longer than 10cm. Support 3/5V
cards.
Remote SIM
- This is a standard connection. The SIM is connected to an external SIM socket
connected to the radio via the DSC bus. Two accessories are existing - M3788 handset and
external SIM card reader. Support 5V card only.
Pin Description
1 Gnd
2 SIM_PD
3 SIM_CLK
4 .*SIM_RST
5 VSIM1
6 SIM_I_O
7 SIM_-5V
8
Gnd
2
1
5
4
3
8
7
6
