12-Fiber Mpo Connectors; Table 22: Cable Signals For 12-Fiber Ribbon Patch Cables - Juniper PTX1000 Hardware Manual

PTX1000 Packet Transport Router Hardware Guide
54
The following sections provide details about different cable and connector types:
12-Fiber MPO Connectors on page 54
24-Fiber MPO Connectors on page 57
LC Duplex Connectors on page 58

12-Fiber MPO Connectors

There are two types of cables used with 12-fiber MPO connectors on Juniper Networks
devices—patch cables with MPO connectors on both ends, and breakout cables with an
MPO connector on one end and four LC duplex connectors on the opposite end. Depending
on the application, the cables might use single-mode fiber (SMF) or multimode fiber
(MMF). Juniper Networks sells cables that meet the supported transceiver requirements,
but it is not required to purchase cables from Juniper Networks.
Ensure that you order cables with the correct polarity. Vendors refer to these crossover
cables as key up to key up, latch up to latch up, Type B, or Method B. If you are using patch
panels between two transceivers, ensure that the proper polarity is maintained through
the cable plant.
Also, ensure that the fiber end in the connector is finished correctly. Physical contact
(PC) refers to fiber that has been polished flat. Angled physical contact (APC) refers to
fiber that has been polished at an angle. Ultra physical contact (UPC) refers to fiber that
has been polished flat, to a finer finish. The required fiber end is listed with the connector
type in the Hardware Compatibility Tool
12-Fiber Ribbon Patch Cables with MPO Connectors
You can use 12-ribbon patch cables with female MPO connectors to connect two
transceivers of the same type—for example, 40GBASE-SR4-to-40GBASESR4 or
100GBASE-SR4-to-100GBASE-SR4. You can also connect 4x10GBASE-LR or
4x10GBASE-SR transceivers by using patch cables—for example,
4x10GBASE-LR-to-4x10GBASE-LR or 4x10GBASE-SR-to-4x10GBASE-SR—instead of
breaking the signal out into four separate signals.
Table 22 on page 54 describes the signals on each fiber.
pin-to-pin connections for proper polarity.

Table 22: Cable Signals for 12-Fiber Ribbon Patch Cables

Fiber Signal
1 Tx0 (Transmit)
2 Tx1 (Transmit)
3 Tx2 (Transmit)
4 Tx3 (Transmit)
5 Unused
.
Table 23 on page 55
Copyright © 2018, Juniper Networks, Inc.
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