SunVTS 3.0 Test Reference Manual

25-Pin RS-232 Loopback Plug

The RS-232 and RS-423 single-port loopback plug is a specially wired male DB-25 connector. It is plugged in to a serial port in the back of the system under test. The wiring is shown in Figure A-1.

Figure A-1 25-pin RS-232 Loopback Plug