Juniper Networks M5 - Manual (Page 195)

RJ-21 Cable Pinouts for Fast Ethernet 12-Port PIC
RJ-48 Pin (on T1/E1 PIC)
(Data numbering form)
DB-15 Pin
(Data numbering
form)
Signal
14 No connect No connect
15 No connect No connect
RJ-21 Cable Pinouts for Fast Ethernet 12-Port PIC
The Fast Ethernet 12-port PIC has a VHDCI connector port on its faceplate (see Figure 55),
which accepts the RJ-21 cable supplied with the PIC (see Figure 56).
Figure 55: Fast Ethernet 12-port PIC
STATUS
Ethernet 10/100 BASE-TX
1801
Figure 56: VHDCI to RJ-21 Cable
1480
Table 25 describes the RJ-21 cable pinouts.
RJ-21 pin numbers 25 and 50 do not appear in the table because they are
ground connectors.
Cable Connector Pinouts 175