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Technical Description
SIMpad SL4
Version V2.0
Siemens AG 19/74
ICM CP 20.08.01, David Brunner
4.3 IrDA interface
Via the IrDA interface, the SIMpad SL4 can communicate with an IrDA peripheral
(external keyboard, mouse, printer, mobile telephone). The IR diodes of the two
devices must be in visual contact and not more than 0.3m apart. The SIMpad SL4
supports the SIR standard (Serial Infrared), with a transmission rate of about 115kbps.
Mobile telephones with the Siemens IrDA interface (S25, S35) and those of the most
important manufacturers with such an IrDA interface can communicate with the
SIMpad SL4. However, they also require an integrated modem. Between the SIMpad
SL4 and the mobile telephone, only a pure data transmission connection can be set
up, for dialling to an ISP or another server. Other types of data exchange (SMS,
telephone directory entries) are not supported by software.
Printers of the most important manufacturers with an integrated IrDA interface can be
controlled. For printers without an IrDA interface, an appropriate IrDA adapter can be
connected to the parallel interface of the printer.
IrDA
Version V1.3
Transmission type infrared
Data rate up to approx. 115kbps (for mobile telephone and
printer)
Standard SIR (serial infrared)
Roaming/Handover No
Range max. 0,3m visual contact
GSM via IrDA minimal, data transmission connection only
4.4 SmartCard
The SmartCard makes personal identification (electronic, personal key) possible, and
gives the option of encrypting and decrypting the data stream with higher-order
asymmetrical encryption. The SmartCard interface is provided according to the ISO
7816 (Part 1-3) standard, and includes a bi-directional data line and a clock line. No
application for using the SmartCard is offered initially.
Caution: In France a different standard called AFNOR-Standard is in use. These card
types do not work on the SIMpad smart card reader.
Pin assignment
Pin 1 VCC
Pin 2 RESET, Output
Pin 3 CLK, Output
Pin 4 NC
Pin 5 GND
Pin 6 VPP
Pin 7 I/O, bi-directional
Pin 8 NC