Juniper PTX1000 Hardware Manual page 62

4x10GBASE-SR-to-10GBASE-SR SFP+ transceivers. The breakout cable is constructed out of a 12-fiber
ribbon fiber-optic cable. The ribbon cable splits from a single cable with a female MPO connector on one
end, into four cable pairs with four LC duplex connectors on the opposite end.
Figure 24 on page 62 shows an example of a typical 12-ribbon breakout cable with MPO-to-LC duplex
connectors (depending on the manufacture, your cable may look different).
Figure 24: 12-Ribbon Breakout Cable
Table 24 on page 62 describes the way the fibers are connected between the MPO and LC duplex
connectors. The cable signals are the same as those described in
Table 24: Cable Pinouts for 12-Fiber Ribbon Breakout Cables
MPO Connector Pin
1
2
3
4
5
6
7
8
9
10
11
12
LC Duplex Connector Pin
Tx on LC Duplex 1
Tx on LC Duplex 2
Tx on LC Duplex 3
Tx on LC Duplex 4
Unused
Unused
Unused
Unused
Rx on LC Duplex 4
Rx on LC Duplex 3
Rx on LC Duplex 2
Rx on LC Duplex 1
Table 22 on page 60.
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