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Line port 69
Model 3088A Series Getting Started Guide 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