|
DB-25
|
DCE
|
DB-9
|
|
|
|
|
1
|
|
|
AA
|
x
|
Protective Ground
|
|
2
|
TXD
|
3
|
BA
|
I
|
Transmitted Data
|
|
3
|
RXD
|
2
|
BB
|
O
|
Received Data
|
|
4
|
RTS
|
7
|
CA
|
I
|
Request To Send
|
|
5
|
CTS
|
8
|
CB
|
O
|
Clear To Send
|
|
6
|
DSR
|
6
|
CC
|
O
|
Data Set Ready
|
|
7
|
GND
|
5
|
AB
|
x
|
Signal Ground
|
|
8
|
CD
|
1
|
CF
|
O
|
Received Line Signal Detector
|
|
9
|
|
|
--
|
x
|
Reserved for data set testing
|
|
10
|
|
|
--
|
x
|
Reserved for data set testing
|
|
11
|
|
|
|
x
|
Unassigned
|
|
12
|
SCF
|
|
|
O
|
Secndry Rcvd Line Signl Detctr
|
|
13
|
SCB
|
|
|
O
|
Secondary Clear to Send
|
|
14
|
SBA
|
|
|
I
|
Secondary Transmitted Data
|
|
15
|
DB
|
|
|
O
|
Transmisn Signl Elemnt Timng
|
|
16
|
SBB
|
|
|
O
|
Secondary Received Data
|
|
17
|
DD
|
|
|
O
|
Receiver Signal Element Timing
|
|
18
|
|
|
|
x
|
Unassigned
|
|
19
|
SCA
|
|
|
I
|
Secondary Request to Send
|
|
20
|
DTR
|
4
|
CD
|
I
|
Data Terminal Ready
|
|
21
|
CG
|
|
|
O
|
Signal Quality Detector
|
|
22
|
|
9
|
CE
|
O
|
Ring Indicator
|
|
23
|
CH/CI
|
|
|
I/O
|
Data Signal Rate Selector
|
|
24
|
DA
|
|
|
I
|
Transmit Signal Element Timing
|
|
25
|
|
|
|
x
|
Unassigned
|
