The pinout is as follows.
|
Signal |
At PTP500 RJ45 jack |
At PIDU LAN jack |
At splitter |
|
|
Ethernet Tx |
1,2 |
3,6 |
3,6 |
|
|
Ethernet Rx |
3,6 |
1,2 |
1,2 |
|
|
E1/T1 Tx |
4,5 |
7,8 |
4,5 |
4=Tx Ring, 5=Tx Tip |
|
E1/T1 Rx |
7,8 |
4,5 |
1,2 |
1=Rx Ring, 2=Rx Tip |
The PIDU does an MDI-X style crossover as per the table above. I’m not sure about crossovers within pairs (e.g. 1,2 --> 2,1), but that shouldn’t matter.