Technical information

Technical Description
SIMpad SL4
Version V2.0
Siemens AG 59/74
ICM CP 20.08.01, David Brunner
5.4.14.6 SmartCard
The SIMpad SL4 has a PC/SC SmartCard API. Further information can be found
under http://www.pcscworkgroup.com.
The SmartCard reader supports the T=1 block-oriented transmission protocol (defined
in ISO7816-3). The commonly used T=0 protocol is officially not supported due to a
hardware defect of the SmartCard reader chip. However, the transmission mistakes of
the SmartCard reader may be compensated on the application side.
5.4.14.7 PC-Card
The following drivers are pre-installed and tested:
• I-Gate 11M PC-Card (WLAN PC-Card, see 3.1)
• Home RF PC-Card (see 3.2)
Other PC-Cards may be used but require the specific driver software to be loaded on
the SIMpad SL4. Additional drivers will be held in the RAM memory (see 2.4) and
therefore will be deleted on a Cold Start or a Factory Reset (see 0).
5.5 Software Update
The software image contains the operating system, the Handheld PC programs and
the standard programs. It is stored in the flash memory. Software image updates can
be downloaded from a server via a direct link.
HTTPS re
q
uest
SIMpad
Update
client
Download server
Server application
CGI script
(in Secure Directory)
CGI call
Images
Image data
or message
Internet
HTTPS response,
Software image download
Fig. 8 Concept of the server/client interaction for an image update
The user can special software update program from the start menu. The default
parameters for the link to the server are pre-configured:
Parameter Default
Download server
www.my-siemens.com/simpadconficurator/index.html
CGI
/cgi-bin/simpadupdate.cgi
The software update program will provide a client application which communicates with
the server via HTTPS (the transmission is encrypted using a 128 bit key).
The server executes a CGI script which incorporates certain interactions with the client
(SIMpad SL4):