Line port
69
Model 3088A Series User Manual
E • Interface pinouts
Line port
RJ-45 connector
RS-232 interface
DB-25 female connector
(DTE/DCE orientation)
Pin #
Signal
1
No connection
2
No connection
3
No connection
4
Tip
5
Ring
6
No connection
7
No connection
8
No connection
Pin # Signal Designation
Source
Pin #
Signal Designation
Source
1
Shield
Common
14
Secondary TD
DTE
2
TD
DTE
15
Transmit Clock
DCE
3
RD
DCE
16
Secondary RD
DCE
4
RTS
DTE
17
Receiver Clock
DCE
5
CTS
DCE
18
Local Loopback
DTE
6
DSR
DCE
19
Secondary RTS
DTE
7
Signal Ground
Common
20
Data Terminal Ready
DTE
8
CD
DCE
21
Remote Loopback
DTE
9
DC Test Voltage (+)
-
22
Ring Indicator
DCE
10
DC Test Voltage (-)
-
23
Data Signal Rate Selector
DTE/DCE
12
Secondary CD
DCE
24
External Transmit Clock
DTE
13
Secondary CTS
DCE
25
Test Mode
DCE