Document Title:
MTP
®
Loopback Casing Installation
Document Number: AEN-1430, Rev. 1.0
4 of 17 THE USE OF SAFETY GLASSES FOR EYE PROTECTION IS RECOMMENDED
2.1
One-row Polarity
Figure 2.1 represents a 12-fiber wide transceiver where the transmitters and
receivers are located in a single row. The loopback device will need to create an
optical path between TX0 and RX0, TX1 and RX1, TX2 and RX2, etc. This
convention would also apply to 16-fiber wide transceivers. This polarity is
compatible with ANSI/TIA-568.3.
Figure 2.1
2.2
Two-row Polarity
Figure 2.2 represents a 12-fiber wide transceiver with two rows. The transmitters
are located in one row, and the receivers are located in the other row. The
loopback device will need to create an optical path between TX0 and RX0, TX1
and RX1, TX2 and RX2, etc. This convention would also apply to 16-fiber wide
transceivers. This polarity is compatible with ANSI/TIA-568.3.
Figure 2.2
3.0
Fiber Ribbon Preparation
This step applies to multimode and single-mode fibers and 12-fiber wide and 16-fiber
wide ribbon. Bend insensitive fiber with minimum bending radius of 7.5mm is
recommended (e.g. ITU-T G.657.A2/B2 for single-mode or bend-insensitive multimode
fiber (BIMMF)). Refer to the transceiver manufacturer’s specifications to select the
appropriate fiber type and MT ferrule for your application. The following steps show
individual loose 250µm fibers. “Peelable” fiber ribbon may also be used, but it is outside
the scope of this document.
