The MPO Single Mode Trunk Cable is a factory-terminated multi-fiber optical assembly using OS2 single-mode fiber and MPO/MTP-compatible connectors at both ends.
Technical Specifications
|
Parameter |
Specification |
|
Product Type |
MPO Single Mode Trunk Cable |
|
Fiber Type |
OS2 Single Mode |
|
Fiber Standard |
G.652D / G.657A1 |
|
Fiber Count |
8F / 12F / 24F / 48F / 72F / 96F |
|
Operating Wavelength |
1310 nm / 1550 nm |
|
Connector Type |
MPO / MTP Compatible |
|
Connector Gender |
Male / Female |
|
Connector Polish |
UPC / APC |
|
Polarity |
Type A / Type B / Type C |
|
Standard Insertion Loss |
≤0.35 dB |
|
Low-Loss Insertion Loss |
≤0.20 dB |
|
Return Loss |
≥50 dB UPC / ≥60 dB APC |
|
Jacket Options |
LSZH / OFNR / PVC |
|
Operating Temperature |
-20°C to +70°C |
|
Compliance |
IEC 61754-7, TIA-604-5, Telcordia GR-1435-CORE, RoHS, REACH |
Connector & Cable Configuration
The trunk assembly uses MPO/MTP-compatible multi-fiber connector interfaces, with the connector arrangement defined for the required end-to-end connection.
Multi-fiber Termination
Multiple single-mode fibers are terminated within each MPO/MTP-compatible connector rather than individually terminated at separate connector interfaces.
End-to-End Configuration
The connector arrangement at both ends is defined to match the required MPO/MTP mating interfaces.
Cable Assembly
The finished cable forms a single factory-terminated trunk assembly between the specified connector interfaces.
Optical Performance for Link-Budget Control
Optical performance is specified at the completed cable assembly level so that the assembly can be evaluated against the optical budget of the intended link.
Key optical parameters include:
Insertion Loss: Specified according to the selected standard or low-loss configuration.
Return Loss: Specified according to the connector polish and applicable single-mode requirements.
Test Wavelength: Optical performance is evaluated at the specified single-mode wavelengths, including 1310 nm and 1550 nm where applicable.
For project orders, optical test results can be recorded against the confirmed product specification. Test documentation can be supplied according to the agreed order requirements.
Polarity Must Match the Link
MPO polarity defines how individual fiber positions correspond between the two ends of the assembly. The selected polarity must match the fiber mapping required by the complete link.
Fiber Mapping
The internal fiber sequence is assembled according to the specified polarity configuration.
Polarity Check
The completed assembly is checked against the required Type A, Type B or Type C fiber mapping before shipment.
Connector Gender
Connector gender is verified against the confirmed assembly specification.
Final Configuration
The completed assembly is checked against the specified connector and polarity configuration before release.
What Is Checked Before Shipment
DIMI's MPO/MTP assembly inspection covers connector geometry, connector end-face condition and finished assembly quality before shipment.
3D Interferometer Inspection: Ferrule geometry is checked for fiber height, radius of curvature and apex offset.
End-Face Inspection: Connector end faces are inspected for contamination, scratches, pits and other visible defects.
Connector Configuration Check: Connector components and assembly configuration are checked against the specified production requirements.
Final Assembly Inspection: The completed cable is inspected for physical condition and conformity with the confirmed assembly specification.
Test Documentation: Individual or batch test records can be provided according to the confirmed project requirements.
DIMI uses dedicated equipment for MPO/MTP assembly, 3D interferometer inspection and optical testing. Each completed assembly is inspected against the confirmed product requirements before shipment. Individual or batch test records can be provided according to project requirements.
MPO Trunk Cable vs. MPO Patch Cable
MPO trunk cables and MPO patch cables are both pre-terminated assemblies, but their cable structure and cabling role are different.
|
Parameter |
MPO Trunk Cable |
MPO Patch Cable |
|
Cable Structure |
Multi-fiber trunk assembly |
Patch/interconnection assembly |
|
Connector Arrangement |
Typically MPO/MTP at both ends |
MPO/MTP or other connector configurations |
|
Connection Structure |
MPO/MTP interface to MPO/MTP interface |
Equipment, patching or interconnection interface |
|
Fiber Mapping |
Defined for the multi-fiber trunk assembly |
Depends on the specific patch cable configuration |
|
Typical BOM Role |
Trunk connection |
Patch or equipment interconnection |
An MPO patch cable may use a different connector arrangement or cable structure, so the required cable type should be identified separately in the project BOM.
From RFQ Specification to Finished Assembly
For project and OEM orders, confirmed RFQ requirements are converted into the manufacturing reference used for production.
The production reference can include:
- Finished cable length
- Labeling and identification requirements
- Project-specific inspection requirements
- Documentation requirements
- Other buyer-approved production instructions
Before production, non-standard requirements are confirmed so that the quotation, manufacturing reference and finished assembly are based on the same approved information.
For repeat orders, the confirmed production reference can be retained for subsequent batches to maintain consistency between the approved requirement and repeat production.
FAQ
Q: How should MPO connectors be cleaned before installation?
A: Inspect and clean the MPO end faces with a multi-fiber connector cleaning tool before mating. Clean exposed connectors to prevent contamination at the optical interface.
Q: What bend radius should be considered for an MPO trunk cable?
A: Confirm the minimum bend radius for the selected cable construction before routing. Allow sufficient slack and avoid tight bends or mechanical load on the MPO connectors.
Q: How should MPO trunk cable length be calculated?
A: Measure the actual routing path between the two termination points and include rack, panel and routing allowances. Confirm the finished length before production.
Q: How can MPO trunk cable compatibility be checked before ordering?
A: Verify the fiber type, fiber count, connector interface, gender, polish, polarity and mating equipment or panel. Check the complete link rather than the MPO interface alone.
Q: How do I choose the fiber count for an MPO single mode trunk cable?
A: Select the fiber count according to the required optical channels and equipment interfaces, with allowance for planned expansion where applicable. Confirm the required count against the project BOM before quotation.
Q: What is the difference between G.652D and G.657A1 fiber for MPO trunk cables?
A: G.652D and G.657A1 are both used for OS2 single-mode applications, while G.657A1 provides improved bend performance. The required fiber standard should follow the project specification and routing requirements.
Q: How should MPO trunk cables be protected during shipment?
A: Protect the MPO connectors from contamination, impact and excessive bending during transport. Packaging and identification requirements can be confirmed for project orders.
Q: How does DIMI manage delivery for project and repeat MPO trunk cable orders?
A: Production and inspection are based on the confirmed specification, with delivery timing and documentation requirements confirmed for each order. Repeat orders can use the approved production reference for consistent execution.
Q: What should buyers check when receiving an MPO trunk cable shipment?
A: Check the cable identification, connector configuration, polarity, finished length and required test records against the purchase specification before installation.
Q: How are specification changes handled for repeat MPO trunk cable orders?
A: Changes to cable configuration, labeling, inspection or documentation should be confirmed before production. The approved changes are then incorporated into the production reference for the applicable batch.
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