Altec GSM SOCKET AL7020S User Manual
Page 7
AL7020S, AL7024S Designer’s Guide
Doc. No. DG_7024E
Altec Electronic AG
Seite 7 / 32
2
2
.
.
T
T
E
E
C
C
H
H
N
N
I
I
C
C
A
A
L
L
O
O
V
V
E
E
R
R
V
V
I
I
E
E
W
W
2.1 Block Diagramm of GSM Module
2.2 Supported
Interfaces
The major hardware signal interfaces of the DF Series SocketGSM Modem are illustrated
in Figure 1-1.
Figure 2-1. Interface Block Diagram
• The RS232 Interface is connected via eight pins to the module.
• The SIM card is connected via 4 pins to the module.
• The Microphone is connected via 2 pins to the module.
• The Speaker is connected via one pin to the module.
• The Indicators are connected via two pins to the module.
• The power supply is connected via one pin to the module.
Socket
GSM
Modem
Module
TTL
Serial
interface
Antenna
Interface
5
3
Leds
2
1
1
Speaker
Microphone
Interface
1
External SIM
(Optional)
3
1