400G QSFP112 LR4 CWDM4 10km Duplex LC Optical Transceiver Module
OT-400G-QSFP-LR4
$1,895.00
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Maximum power consumption below 10W.
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Hot-pluggable QSFP112 form factor.
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Transmit over single-mode fibers up to 10km.
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Duplex LC receptacles and built-in digital diagnostics.
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4×106.25Gbps(53.125GBd PAM4)electrical interface.
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4×106.25Gbps(53.125GBd PAM4)optics architecture.
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Compliant with 400G-LR4 technical specifications.
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QSFP112 MSA, CMIS, and RoHS-compliant.
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Operating temperature range (0℃ to +70℃).
MSA Compatible 400G QSFP112 LR4 Optical Transceiver Module (SMF CWDM4, 10km, Duplex LC)
Specification
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Connectivity solution

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Questions & Answers
A 400G QSFP112 LR4 (Long Reach 4-channel) is a pluggable optical transceiver module designed for 400 Gigabit Ethernet applications. It transmits and receives 400Gbps of data using four optical lanes, each of which carries 100Gbps. It is designed for single-mode fiber applications with a wider reach, often up to 10 kilometers, as indicated by the “LR4” designation.
At 400G, QSFP112 LR4 transceivers need SMF (single-mode fiber). They are not compatible with multi-mode fiber. Usually, G.652.D, or Better SMF, is used.
These identifiers imply fiber kind and reach:
SMF is used by LR4 (Long Reach 4-channel) with a 10-kilometer reach.
Data Center Reach 4-channel, or DR4, employs SMF and has a 500-meter reach.
FR4 (Far Reach 4-channel) has a 2-kilometer reach and uses SMF.
SR4 (Channel Short Reach) employs MMF and has a relatively short reach (often up to 100m).
Long Reach: Enables connections up to 10 kilometers.
Excellent Bandwidth: 400Gbps is possible.
Using traditional single-mode fiber networks is known as “just single-mode fiber.”
High Density: The QSFP112 form factor maximizes port density.
Amount Restrictions: Although 10 kilometers may seem like a fair amount, it is nonetheless a restriction. At even longer distances, other solutions (such as coherent optics) would be needed.
Fiber Quality: The quality of the single-mode fiber is crucial for reliable operation over long distances. Loss and dispersion must be within acceptable boundaries.
Cost: Compared to MMF cabling and shorter-reach options, LR4 transceivers and SMF cable may be more expensive.
Steps for troubleshooting are comparable to those for other optical transceivers:
1. Check for Fiber Connections: Verify the fiber type (MMF), cleanliness, and correct connection.
2. Examine the fiber: To look for contamination or damage, use a fiber scope.
3. Verify the configuration of the switch or router: Make sure the port is set up properly.
4. Track the Levels of Optical Power: To monitor power levels, use a light meter.
5. Transceivers to swap: Consider using a reputable transceiver.
6. Examine the logs: Check for problems in the switch/router logs.