DB-25 pin assignments
|
Pin |
Name |
Signal |
Pin |
Name |
Signal |
|
1 |
FG |
Frame ground |
14 |
STD |
Secondary TD |
|
2 |
TD |
Transmitted data |
15 |
TC |
Transmit clock |
|
3 |
RD |
Received data |
16 |
SRD |
Secondary RD |
|
4 |
RTS |
Request to send |
17 |
RC |
Receive clock |
|
5 |
CTS |
Clear to send |
18 |
- |
Unassigned |
|
6 |
DSR |
Data set ready |
19 |
SRTS |
Secondary RTS |
|
7 |
SG |
Signal ground |
20 |
DTR |
Data terminal ready |
|
8 |
DCD |
Data carrier signal |
21 |
SQ |
Signal quality detector |
|
9 |
- |
Positive voltage |
22 |
RI |
Ring indicator |
|
10 |
- |
Neagative volrage |
23 |
DRS |
Data rate selector |
|
11 |
- |
Unassigned |
24 |
SCTE |
Clock transmit external |
|
12 |
SDCD |
Secondary DCD |
25 |
BUSY |
Busy |
|
13 |
SCTS |
Secondary CTS |
