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2. INSTALLATION
The GSM modem installation must be carried out between a range of temperature
indicated in the manual.
Attention: the power supply voltage must not exceed the indicated maximum
value as this may cause a damage of the product.
2.1 PIN-OUT OF GSM BULK
The following table shows the pin-out connector:
J5 : RS232 [ standard ]
(male connector 2x7pin lead-space 2.54)
U4 : Microphone input [ standard ]
(male connector 2pin lead-space 2.54)
U5 : Speaker output [ standard ]
(male connector 2pin lead-space 2.54)
J7 : RS232 [ optional ]
(male connector 2x25pin lead-space 1.27)
Power supply
Vcc =
5Vdc ± 10%
Icc =
350mA typ [1700mA max]
RS232 interface: TTL levels
IN Signal:
TD, RTS, DTR, On/Off
Vih = 2,0 V min
Vil = 0,8 V max
6
PIN
PIN
SIGNAL
J5
J7
1
-
DCD
2
27
DSR
3
28
RxD
4
30
RTS
5
25
TxD
6
13
CTS
7
29
DTR
8
-
RING
9
1-2-6
Gnd
10
3-4
5Vdc
11
-
-
12
15
On/Off
13
-
-
14
21-24
Gnd
(U4) 1
20
Mic ( + )
(U4) 2
-
Mic ( - )
(U5) 1
12
Spk ( + )
(U5) 2
-
Spk ( - )
RD, CTS, DSR, DCD, RI
ELECTRIC
DIRECTION
LEVEL
DTE <== DCE TTL 0 = Active
DTE <== DCE TTL 0 = Active
DTE <== DCE TTL 0 = Space
DTE ==> DCE TTL 0 = Active
DTE ==> DCE TTL 0 = Space
DTE <== DCE TTL 0 = Active
DTE ==> DCE TTL 0 = Active
DTE <== DCE TTL 0 = Active
-
0 Volt
-
5 Volt
-
N.C.
TTL 1 = On
DTE ==> DCE
TTL 0 = Off
-
N.C.
-
0 Volt
DTE ==> DCE
DTE ==> DCE
DTE <== DCE
DTE <== DCE
OUT Signal:
Voh = 2,4 V min
Vol = 0,4 V max
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