Motorola D15 Integration And Application Developers Manual page 35

Gsm engine / modem
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TXD
3
DTR
4
RTS
7
2
RXD
DCD
1
CTS
8
DSR
6
RI
9
Host Device DTE
using standard DB9
Figure 17 - DTE connection to d15 (user connector 28 pin DIN)
When a DCE is connected to the D15 (DCE device)
RXD
DSR
CTS
TXD
DCD
RTS
DTR
RI
Host is a DCE device
Figure 18 - DCE connection to d15(user connector 36 pin ZIF)
d15 Modem Integration and Application Developers Guide version draft 0.53
TXD
25
DTR
7
RTS
28
RXD
26
DCD
14
CTS
27
DSR
21
RI
13
D15 is a DCE device
User connector28 pin DIN
TXD
4
DTR
6
RTS
8
RXD
5
DCD
7
CTS
9
DSR
10
RI
11
D15 is a DCE device
User connector36 pin ZIF
TXD
DTR
RTS
RXD
D15
processor
DCD
CTS
DSR
RI
D15
TXD
DTR
RTS
RXD
D15
processor
DCD
CTS
DSR
RI
D15
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