Figure 121: Fast Ethernet 48-Port Pic; Figure 122: Vhdci To Rj-21 Cable; Table 36: Rj-21 Pin Assignments - Juniper Internet Router M160 Hardware Manual

Figure 121: Fast Ethernet 48-port PIC

Figure 122: VHDCI to RJ-21 Cable

Table 36 describes the RJ-21 cable pinouts.
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
0, 12, 24, 36
1, 13, 25, 37
2, 14, 26, 38
3, 15, 27, 39
4, 16, 28, 40
5, 17, 29, 41
RJ-21 Pin Assignment
TX - TX + RX -
2 27 1
4 29 3
6 31 5
8 33 7
10 35 9
12 37 11
Fast Ethernet 48-port Cable Pinouts
Cable Connector Pinouts
RX +
26
28
30
32
34
36
275