Datasheet

INSYS GSM 4.2 I4 Overview
14 Dez-06
2.4.3 Serial interface RS232 (V.24)
Pin layout of the serial interface RS232, 9-pin SUB-D connector with threaded joint:
Pin Description Function
CCITT
V.24
EIA
RS232
DIN
66020
E/A DCE to
DTE
1 DCD Data Carrier Detect 109 CF M5 O
2 RXD Receive Data 104 BB D2 O
3 TXD Transmit Data 103 BA D1 I
4 DTR Data Terminal Ready 108 CD S1 I
5 GND Ground 102 AB E2
6 DSR Data set ready 107 CC M1 O
7 RTS Request to send 105 CA S2 I
8 CTS Clear To Send 106 CB M2 O
9 RI Ring Indication 125 CE M3 O
2.4.4 SIM card
For the data connection to the GSM network, the device requires a SIM card from a GSM
provider. The SIM card is the identification towards the network provider.
The slot for the SIM card is on the front of the device.
Notes:
 Only 3V cards may be used.
 Changing the SIM card is only permitted when the device is
switched off.
The GSM provider has to enable the requested services for the SIM card. A card can be
enabled for both voice and data services at the same time. The following cards and con-
tracts are normally available:
Function Prepaid card Contract for voice
transmission
Contract for data
transmission
Outgoing data connec-
tion
  
Incoming data connec-
tion
- -

SMS
  
Voice connection
 
-
Note
Generally, different phone numbers are assigned to the different
services (voice, data connections with 2400, 4800 and 9600 bps).
The GSM network does not switch a data call to a phone number for
voice connections, for example.