This loopback is a "straight-through" connection.For testing applications, there are many tools for this function, such as visual faults locator, optical power meter, OTDR, etc. Using two standard RJ45 connectors, and connect pin1 to pin1, pin 2 to pin 2, and so on, for all pins. Please note that this cable has no Sun part number assigned to it. Both connectors are male.įigure A-14 9-Pin to 9-Pin Port-to-Port Loopback Cable Use these wiring instructions for 9-pin RS-232 and RS 423 port to 9-pin RS-232 and RS-423 port loopback cables (see Figure A-14). Figure A-13 9-Pin to 25-Pin Port-to-Port Loopback Cableĩ-Pin to 9-Pin Port-to-Port Loopback Cable Use these wiring instructions for a 9-pin RS-232 and RS-423 port to 25-pin RS-232 and RS 423 port loopback cables (see Figure A-13). Use this loopback plug with the pcmciatest.ĩ-Pin to 25-Pin Port-to-Port Loopback Cable Use these wiring directions for female 9-pin RS-232 and RS-423 single-port loopback plugs (see Figure A-12): Figure A-12 9-Pin Female Single-port Loopback Plug Use these wiring instructions for male 9-pin RS-232 and RS-423 single-port loopback plugs (see Figure A-11): Figure A-11 9-Pin Male Single-port Loopback Plug This connector is also available from Sun (Part Number 530-1430). Use these wiring instructions for making a male 37-pin RS-449 loopback plug (see Figure A-10). Use these wiring instructions for a loopback cable for two 37-pin RS-449 synchronous ports (see Figure A-9). Figure A-8 96-Pin Female Special Loopback Connector This 96-pin connector (see Figure A-8) can be ordered from Sun Microsystems Figure A-7 96-Pin Female Loopback Connector This 96-pin connector (see Figure A-7) can be ordered from Sun Microsystems If your system has a single communication port to connect it to peripherals, use these wiring instructions for making a male 25-pin loopback plug for that communication port (see Figure A-6): Figure A-6 Port A-to-A, Port B-to-B Loopback Plug Figure A-5 Port A-to-Port B Loopback Plug Use these wiring directions for a 25-pin Port A to Port B loopback plug for most systems (see Figure A-5). Pin 8, Receive Clock In (DD), remains unconnected. Use these wiring directions for male 8-pin round-DIN RS-232 and RS-423 Single port loopback plugs (see Figure A-4). Pin 8, Receive clock In (DD), remains unconnected. Use these wiring directions for 8-pin round DIN RS-232 port to RS-423 to 8-pin round-DIN RS-232 and RS-423 port loopback cable (see Figure A-3). Figure A-2 25-pin RS-232 Port-to-Port Loopback Cable
#Rj45 loopback connector serial
It is plugged into a pair of serial ports in the back of the system under test. Use these wiring instructions for 25-pin RS-232 and RS-423 port to 25-pin RS 232 and RS 423 port loopback cables (two DB-25 connections). Figure A-1 25-pin RS-232 Loopback PlugĢ5-pin RS-232 Port-to-Port Loopback Cable It is plugged in to a serial port in the back of the system under test. The RS-232 and RS-423 single-port loopback plug is a specially wired maleĭB-25 connector. NC = No connection 25-Pin RS-232 Loopback Plug Table A-1 Loopback Connector Pin Assignments The table below depicts the pin assignments for most loopback plugs and cables that may be used when testing a system. Miswired, poorly soldered, or missing loopback connectors can cause erroneous diagnostic error messages. Loopback connectors must be wired properly and connected firmly for the Serial Port tests to work correctly. They take the form of either a single plug or a port-to-port cable with some communication connections shorted (looped-back). Loopback connectors are designed for the testing of communication ports.
0 kommentar(er)
