Internet Router Hardware Guide

Cable Connector P inouts
Figure 121: Fast Ethernet 48-port PIC
1476
Figure 122: VHDCI to RJ-21 Cable
1480
Table36describestheRJ-21cablepinouts.
NOTE: RJ-21 pin numbers 25 and 50 do not appear in the table because they
are ground connectors.
Table 36: RJ-21 Pin Assignments
Ethernet Port Numbers RJ-21 Pin Assignment
TX- TX+ RX- RX+
0, 12, 24, 36 2 27 1 26
1, 13, 25, 37
4
29 3 28
2, 14, 26, 38 6 31 5 30
3, 15, 27, 39 8 33 7 32
4, 16, 28, 40 10 35 9 34
5, 17, 29, 41 12 37 11 36
Fast Ethernet 48-por t Cable Pinouts 275