What should an MTP/MPO branch harness cable RFQ include?

Include the assembly role, fiber count, fiber mode, connector configuration at both ends, breakout or fanout requirement, polarity or channel drawing, individual lengths, quantity, labeling, packing and connected panel or equipment context.

Why should a branch harness be listed separately from a trunk cable?

A branch harness has its own breakout interfaces and length relationships. Separating it into a distinct BOM line helps the buyer and supplier review the transition from the high-density side to the downstream connection.

Should patch panels and cassettes be included in a harness inquiry?

Include them when they are part of the same channel. Their port plan and connector interface provide useful context for checking that the harness ends, polarity and related patch cords match the intended path.

MTP/MPO Branch Harness Cable RFQ Checklist

Describe the Connection Path Before Naming the Assembly

“MPO to LC harness” is a useful starting label, but it does not identify how the assembly connects. For each line, identify the high-density end, the breakout end, the equipment, cassette or panel it serves, and whether the request is a branch harness, fanout or another pre-terminated cable assembly. This gives a purchasing team a repeatable way to compare offers without assuming a specific network design.

Lumafyn supports MTP/MPO trunk cables, branch harness cables, fanout assemblies and pre-terminated fiber cable RFQs. When a harness follows a trunk, include both lines and the connection context in the same BOM.

Fields for an MTP/MPO Branch Harness Cable RFQ

Assembly roleState branch harness, fanout, trunk transition or another assembly role.

End configurationIdentify the MTP/MPO end and each breakout-side connector interface, including the required end arrangement.

Fiber count and modeList the required fiber count and the singlemode or multimode requirement from the project BOM.

Polarity and channel referenceState the polarity requirement where defined, or attach a channel drawing or port map for review.

Length listRecord trunk length, harness length and any unequal breakout-length requirement as separate values.

Project referencesAdd quantity, labels, packing, destination, rack/panel reference and drawing or BOM revision.

Build a Connected BOM, Not Isolated Cable Lines

Where a branch harness works with a trunk, cassette, module box or high-density panel, make those relationships visible. A simple BOM can use one row per assembly and cross-reference the rack, cabinet, zone or drawing identifier. This is especially useful when the MTP/MPO side and breakout side serve different interfaces.

Trunk or upstream line: identify the associated high-density cable and its endpoint.
Harness line: record the branch configuration, end interfaces, polarity reference and each length value.
Panel or cassette line: include port plan and connector format when the hardware is part of the same path.
Downstream line: add LC patch cords, transceivers, AOC/DAC or other connected items only when they are within the RFQ scope.

Common RFQ Mistakes

Writing “MPO harness” without showing the connector configuration at both ends.
Giving one overall length when the breakout legs need their own length list.
Omitting the fiber count, fiber mode or polarity/channel reference.
Combining trunk and harness requirements into one generic cable line.
Leaving out the cassette, panel or equipment interface that explains the breakout side.
Using a BOM revision without marking which drawing or port plan the cable line follows.

Copyable MTP/MPO Harness RFQ Checklist

Assembly role: branch harness, fanout or trunk transition
Fiber count and fiber mode required by the project
MTP/MPO-side and breakout-side connector configuration
Polarity method or attached channel/port drawing
Trunk, harness and breakout-leg lengths where applicable
Quantity, cable color, label rule, packing and destination
Related trunk, cassette, module box, panel or equipment reference
BOM revision, rack layout or drawing reference for the quotation review