The RJ-45 connector on the Model 1082’s twisted pair interface is polar- ity insensitive and is wired for a two-wire interface. The signal/pin rela- tionships are shown in Figure 7 below.
Figure 7. Model 1082/I twisted pair line interface
5.2 CONNECTING 10BASE-T ETHERNET PORT TO PC (DTE)
The 10Base-T interface is configured as DTE (Data Terminal Equip- ment). If the Model 1088 is to to connect to another DTE device such as a 10Base-T network interface card, construct a 10Base-T crossover cable and connect the wires as shown in Figure 8.
10Base-T Port | 10Base-T DTE |
RJ-45 Pin No. | RJ-45 Pin No. |
1 (TD+) | 1 (TD+) |
2 (TD-) | 2 (TD-) |
3 (RD+) | 3 (RD+) |
6 (RD-) | 6 (RD-) |
Figure 8. Connecting 10Base-T Ethernet port to PC
5.3 CONNECTING 10BASE-T ETHERNET PORT TO HUB (DCE)
The 10Base-T interface is configured as DTE (Data Terminal Equip- ment), just like a 10Base-T network interface card in a PC. Therefore, it “expects” to connect to a 10Base-T Hub using a straight-through RJ-45 cable. Figure 9 shows how to construct a cable to connect the 10Base-T interface to a 10Base-T Hub.
10Base-T Port | 10Base-T Hub |
RJ-45 Pin No. | RJ-45 Pin No. |
1 (TD+) | | | 1 (TD+) |
| |
2 (TD-) | | | 2 (TD-) |
| |
3 (RD+) | | | 3 (RD+) |
| |
6 (RD-) | | | 6 (RD-) |
| |
Figure 9. Connecting the 10Base-T interface to a 10Base-T Hub
