Polarity method selections in MTP / MPO fibre optics
News, Press Releases, HypaFOX MTP® - September 30, 2020
Polarity Method A – Duplex Links (10G)
- Suitable for both singlemode and multimode.
- Employs Key up to Key down adaptors to connect array connectors.
- The link contains type A array MTP®/MPO trunk cable (key up to key down).
- The link contains type A MTP®/MPO cassettes which are key up to key down configuration.
- Cassettes are mounted in a WBT high density patch panel.
- Only one cassette type is used at each end.
- This is the default standard configuration offered by WBT.
- Duplex fibre links require standard A-B LC duplex patch cords at one end and A-A LC Duplex patch cords at the opposite end.
- To simplify deployment, it is recommended to utilise reversible polarity LC duplex patch cords, which allows the user to easy flip pairs in one of the LC duplex connectors.
Polarity Method A – Parallel optics (40G and 100G)
- Compatible with 40G and 100G standards.
- Key up to key down adaptors required for mated connection in between MTP®/MPO trunks (Type A).
- Utilises MTP®/MPO bulkhead adaptors, instead of MTP®/MPO to LC breakout modules in the patch panel.
- One type A and one type B array patch cord must be used at each end of the link to connect to active equipment.
Polarity Method B – Duplex Links (10G)
- Suitable for multimode only. Not to be used for singlemode systems.
- Mated connections are key up to key up and key down to key down at the opposite end.
- Utilises type B array cable (key up to key up).
- Requires 2 different MTP®/MPO cassettes at each end – B1 and B2.
- Utilises standard A-B LC Duplex patch cords at each end.
Polarity Method B – Parallel optics (40G and 100G)
- Utilises MTP®/MPO type B cables and adaptor bulkheads throughout the entire link.
- Utilises MTP®/MPO bulkhead adaptors, instead of MTP®/MPO to LC breakout modules in the patch panel.
- Simple deployment method for 40G and 100G systems.
- Key up to key up positioning all throughout the link ensures correct polarity and alignment.
- Utilises type B array trunk cable and patch cords (key up to key up).
Polarity Method C – Duplex Links (10G)
- Suitable for both singlemode and multimode.
- Employs Key up to Key down adaptors to connect array connectors.
- The link contains type C array MTP®/MPO trunk cable (key up to key down) with flipped pairs.
- The link contains type A MTP®/MPO cassettes which are key up to key down configuration.
- Cassettes are mounted in a WBT high density patch panel.
- Only one cassette type is used at each end.
- Uses standard Duplex fibre A-B LC duplex patch cords at both ends.
- In method C, the fibre circuit is completed by utilising standard A-B patch cords at each end of the link. The fibre pair flip is accomplished in the array cable itself, not in the patch cords.
- Method C is not recommended for parallel optics, 40G and 100G.
