Table of Contents
Advertisement
4
4.1
4.2
Siemens AG
ICM CP
Interface
Serial/headset interface("Lumberg" plug)
The universal interface ("Lumberg" plug) is used in Siemens mobile telephones (from
S25 and higher) and provides the following part interfaces for the SIMpad SL4:
•
serial interface (RS-232; V.24 level conversion 12 V)
•
audio headset interface
Via the serial interface, the SIMpad SL4 can communicate with a PC for data
exchange (see 5.4.5), or with peripherals (external keyboard, modem, mobile
telephone). For this, a crossed (9-pin) serial cable is used (see 6.1.3). Data
transmission is possible in one direction at a time only (no duplex).
The serial cable for Siemens mobile phones has an integrated level conversion.
Therefore it cannot be used for the SIMpad SL4 which requires a simple cable without
level conversion (see 6.1.3).
Standard
Plug type
Pin assignment
Pin 1
Pin 2
Pin 3
Pin 4
Pin 5
Pin 6
Pin 7
Pin 8
Pin 9
Pin 10
Pin 11
Pin 12
Fig. 3 Universal interface: "Lumberg" plug with pin numbering
USB-Client interface
The USB-Client interface is not supported due to a defect of the StrongARM SA-1110
processor (see 2.2).
"Lumberg" plug; Siemens proprietary
GND
TXD, Output
RXD, Input
DTR, Output
RTS, Output
DSR, Input
CTS, Input
DCD, Input
Microphone -, Input
Microphone +, Input
Ear +, Output
Ear -, Output
1
Technical Description
SIMpad SL4
Version V2.0
12
18/74
20.08.01, David Brunner
Advertisement
Table of Contents
