AL7020S Designer’s Guide
Doc. No. DG_7020B
Altec Electronic AG
Seite 8 / 32
3
3
.
.
H
H
A
A
R
R
D
D
W
W
A
A
R
R
E
E
I
I
N
N
T
T
E
E
R
R
F
F
A
A
C
C
E
E
3.1 Interface
Signals
The Socket Modem pin assignments with DTE serial TTL interface, SIM Card and Analog
Interface are shown in Figure 3-1 and are listed in Table 3-1.
3.2 Signal
Description
The Socket Modem interface signals are described in Table 3-3.
The digital electrical characteristics are listed in Table 3-4.
The analog electrical characteristics are listed in Table 3-5.
