If we purchase a spare batch for long-term inventory in our warehouse, what are the storage requirements before field deployment?

Modules can be stored unpowered from -40°C to +85°C in dry, non-condensing environments. Always keep the protective dust caps firmly seated inside the optical bore until the exact moment patch cords are plugged in. This protects internal DFB lenses from dust accumulation and moisture during long shelf storage.

Can this 1330nm 1G CWDM SFP module be deployed on standard point-to-point single-mode fiber runs if our site does not use a CWDM MUX/DEMUX unit?

Yes, the LS-CW331G-20C module works as a standard point-to-point fiber link over single-mode fiber up to 20km without any multiplexer hardware. Just make sure both ends use matching 1330nm transceivers.

If we place this 1330nm transceiver on the same CWDM multiplexer filter next to a 1310nm port, will optical channel crosstalk impact transmission performance?

No, there is no signal interference. The transceiver uses a precision DFB laser with a narrow spectral width centered at 1330nm. Standard CWDM channel filters provide high isolation between channels, preventing light leakage into adjacent 1310nm wavelengths.

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LINK-PP LS-CW331G-20C 1G SFP CWDM 1330nm 20km Duplex LC DOM SMF Optical Transceiver Module

Name: LINK-PP LS-CW331G-20C 1G SFP CWDM 1330nm 20km Duplex LC DOM SMF Optical Transceiver Module
Brand: LINK-PP
SKU: 202235
Price: 54.61 SGD
Availability: InStock
Rating: 4.9 (23 reviews)

Product: LINK-PP LS-CW331G-20C 1G SFP CWDM 1330nm 20km Duplex LC DOM SMF Optical Transceiver Module
SKU: 202235
P/N: LS-CW331G-20C
Price: SGD 63.5
Stock: 130 in Stock
Sold: 1.1K
Product URL: https://www.l-p.com/products/491713.htm

For Order Over $1000 Get $15.00 Off , Code: Linkpp15

For Order Over $3000 Get $50.00 Off , Code: Linkpp50

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23 Reviews

3 Questions

1.1K Sold

S$ 50

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Manufacture: LINK-PP P/N: LS-CW331G-20C SKU: 202235

Compatible:: Cisco; LINK-PP; Arista; Brocade; Dell; Extreme; H3C; HPE; HW; Juniper

Wavelength:: 1270nm; 1290nm; 1310nm; 1330nm; 1350nm; 1370nm; 1390nm; 1410nm; 1430nm; 1450nm; 1470nm; 1490nm; 1510nm; 1530nm; 1550nm; 1570nm; 1590nm; 1610nm

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Estimated delivery time : 3 - 10 days.

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LINK-PP LS-CW331G-20C 1G SFP Specifications

LS-CW331G-20C CWDM SFP module is built for 1.25Gbps network links, pairing a 1330nm DFB laser and PIN photo detector to transmit signals across single-mode fiber up to 20km. It includes real-time optical diagnostics for easy system monitoring and runs reliably in commercial temperatures from 0 to +70°C.

LINK-PP Part Number	LS-CW331G-20C	Vendor Name	LINK-PP
Form Factor	SFP	Max Data Rate	1.25Gbps
Wavelength	1330nm	Max Cable Distance	20km
Connector	Duplex LC	Media	SMF
Transmitter Type	DFB	Receiver Type	PIN
TX Power	-5 to 0dBm	RX Power	-26 to -1dBm
Receiver Sensitivity	-24dBm	Receiver Overload	-1dBm
EMC (Electromagnetic Compatibility)	Supported	DDM/DOM	Supported
Operating Temperature Range	0 to 70°C	Protocols	SFP MSA、SFF-8472

Key Features of LINK-PP LS-CW331G-20C 1G SFP

LINK-PP LS-CW331G-20C combines essential optical specifications into a commercial-grade 1G CWDM transceiver designed for reliable 1330nm transmission. It delivers stable 20km single-mode connectivity through a standard duplex LC interface while integrating real-time digital optical diagnostics.

LINK-PP LS-CW331G-20C 1G SFP Optical Module

This transceiver features a hot-pluggable SFP footprint that allows quick installation and maintenance without powering down host switches. Built in full compliance with the standard SFP MSA, it ensures broad physical and electrical compatibility across multi-vendor networking hardware.

LS-CW331G-20C: 1 Gbps Connectivity for Point-to-Point Metro Links

Gigabit Ethernet line rates up to 1.25Gbps provide steady, non-blocking throughput across point-to-point metro architectures. These dedicated data channels make it an effective solution for connecting enterprise campus buildings and metropolitan edge routing nodes.

LS-CW331G-20C Module with CWDM Technology for Fiber Efficiency

Coarse Wavelength Division Multiplexing enables multiple distinct data streams to travel across a shared single-mode strand. This spectral separation maximizes existing fiber capacity and eliminates the need to run costly new optical cabling.

LS-CW331G-20C Module with 1330nm Wavelength

Operating at the specific 1330nm optical wavelength channel ensures smooth integration into standard ITU-T CWDM grid multiplexers. The integrated DFB transmitter maintains precise spectral alignment to prevent channel crosstalk across adjacent wavelengths.

LS-CW331G-20C Module Supporting 20km Transmission

Single-mode fiber reach extends up to 20km, providing ample optical power budget for intermediate campus and regional spans. Its optical receiver ensures low bit error rates across long spans without requiring external signal amplification.

LS-CW331G-20C Module with Duplex LC Interface

An industry-standard duplex LC optical receptacle provides a secure, compact mechanical connection for network patching. The dual-fiber port design simplifies polarity management and pairs directly with conventional LC single-mode patch cords.

LS-CW331G-20C Module with DOM for Real-Time Monitoring

Digital optical monitoring functions provide live telemetry compatible with the SFF-8472 diagnostic standard. Network administrators can continuously track key operating parameters such as optical Rx/Tx power, laser bias current, temperature, and supply voltage.

LINK-PP LS-CW331G-20C 1G SFP Certification

LINK-PP LS-CW331G-20C 1G CWDM SFP module meets strict international standards with certifications including ISO 9001, CE, RoHS, and FCC to ensure safety and environmental compliance.

LS-CW331G-20C Quality Testing Program

Every optical module undergoes rigorous physical and optical parameter testing before shipment to guarantee stable signal transmission.

LS-CW331G-20C Quality Certifications

Comprehensive quality approvals verify that the module delivers safe, compliant operation in commercial network environments.

LS-CW331G-20C Certified for Reliable Host-Device Compatibility

Comprehensive switch-port interoperability testing guarantees true plug-and-play integration across leading vendor platforms, ensuring seamless host-device recognition and stable performance.

Rigorous Testing Ensures Reliable SFP Performance

Every LS-CW331G-20C SFP transceiver undergoes thorough validation to guarantee stable optical transmission across all live network environments. To explore our complete quality verification standards and methodologies, visit the LINK-PP Test Support Center.

Rigorous Testing Ensures Reliable Transceiver Performance

Optical Spectrum Test

Measure wavelength accuracy and spectral width for stable channel alignment.

Eye Pattern Test

Evaluate optical signal integrity and waveform quality to minimize distortion.

Bit Error Rate Test

Validate packet transmission accuracy and data consistency under full load.

Temperature Test

Assess thermal stability and component reliability across standard operating ranges.

Product Shipping for LINK-PP LS-CW331G-20C 1G SFP

LINK-PP LS-CW331G-20C 1G SFP transceivers follow strict handling protocols from our warehouse straight to your networking facility. Our streamlined fulfillment workflow ensures swift transit while preserving the physical and optical integrity of every product.

Anti-Static Protective Packaging

Neutralize harmful electrical charges to keep delicate internal circuitry safe.

Shock-Resistant Transport Protection

Absorb movement stress to safeguard precision internal laser alignment mechanisms.

Fast Order Processing and Dispatch

Accelerate warehouse handling workflows to shorten overall customer project lead times.

Global Logistics and International Delivery

Partner with reliable international freight carriers for secure worldwide delivery.

LINK-PP LS-CW331G-20C 1G SFP Usage Demonstration

Featuring plug-and-play operation, the LS-CW331G-20C CWDM SFP transceiver installs directly into active switch ports with duplex LC single-mode patch cords for instant deployment. It provides stable 1Gbps connectivity across 1330nm channels, making it ideal for point-to-point metro links, edge routing, and inter-building campus networks.

LS-CW331G-20C Technical Support

LINK-PP offers end-to-end technical support, from pre-sales consultation to post-deployment assistance, ensuring smooth integration and reliable network performance.

Pre-Sales Technical Consultation

Professional guidance to help you select the optimal LS-CW331G-20C module for your network design and application needs.

Compatibility Verification Support

Validated compatibility with LINK-PP switches and other mainstream networking platforms for seamless deployment.

Deployment & Installation Assistance

Comprehensive step-by-step guidance for installation, configuration, and initial setup, ensuring accurate deployment and reliable, stable operation from the start.

Long-Term Technical Assurance

Ongoing technical support throughout the product lifecycle, delivering long-term stability for enterprise and carrier-grade networks.

LINK-PP LS-CW331G-20C 1G SFP After-Sales Assurance

LINK-PP provides after-sales support for the smooth deployment and reliable operation of the optical modules.

15-day no-reason return and refund

Free replacement for dead-on-arrival (DOA) or defective items within the initial period

Free repair services for manufacturing defects throughout the warranty period

Warranty exclusions and conditions apply

Model Comparison Table

	Current Model LS-CW331G-20C Wavelength: 1330nm	LS-CW331G-40C Wavelength: 1330nm	LS-CW331G-80C Wavelength: 1330nm	LS-CW611G-40C Wavelength: 1610nm	LS-CW591G-40C Wavelength: 1590nm	LS-CW571G-40C Wavelength: 1570nm

Compatible	LINK-PP	LINK-PP	LINK-PP	LINK-PP	LINK-PP	LINK-PP
Data Rate (Max)	1.25Gbps	1.25Gbps	1.25Gbps	1.25Gbps	1.25Gbps	1.25Gbps
Wavelength	1330nm	1330nm	1330nm	1610nm	1590nm	1570nm
Connector	Duplex LC	Duplex LC	Duplex LC	Duplex LC	Duplex LC	Duplex LC
Cable Distance (Max)	20km	40km	80km	40km	40km	40km
Cable Type	SMF	SMF	SMF	SMF	SMF	SMF
TX Power	-5 to 0dBm	-5 to 0dBm	-1 to +4dBm	-5 to 0dBm	-5 to 0dBm	-5 to 0dBm
Receiver Sensitivity	-24dBm	-24dBm	-26dBm	-24dBm	-24dBm	-24dBm
Operating Temperature	0 to 70°C	0 to 70°C	0 to 70°C	0 to 70°C	0 to 70°C	0 to 70°C
Temperature	Commercial	Commercial	Commercial	0 to 70°C	Commercial	0 to 70°C
Form Factor	SFP	SFP	SFP	SFP	SFP	SFP
Transmitter Type	DFB	DFB	DFB	DFB	DFB	DFB
Receiver Type	PIN	PIN	PIN	PIN	PIN	PIN
Receiver Overload	-1dBm	-1dBm	-1dBm	-1dBm	-1dBm	-1dBm
EMC (Electromagnetic Compatibility)	Supported	Supported	Supported	Supported	Supported	Supported
DDM/DOM	Supported			Yes	Yes	Yes
Protocols	SFP MSA、SFF-8472	SFP MSA、SFF-8472	SFP MSA、SFF-8472	SFP MSA、SFF-8472	SFP MSA、SFF-8472	SFP MSA、SFF-8472

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Questions & Answers
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Q: If we purchase a spare batch for long-term inventory in our warehouse, what are the storage requirements before field deployment? By A***n on 2026-03-20

A: Modules can be stored unpowered from -40°C to +85°C in dry, non-condensing environments. Always keep the protective dust caps firmly seated inside the optical bore until the exact moment patch cords are plugged in. This protects internal DFB lenses from dust accumulation and moisture during long shelf storage. By admin on 2026-03-21
Q: Can this 1330nm 1G CWDM SFP module be deployed on standard point-to-point single-mode fiber runs if our site does not use a CWDM MUX/DEMUX unit? By J***r on 2025-11-24

A: Yes, the LS-CW331G-20C module works as a standard point-to-point fiber link over single-mode fiber up to 20km without any multiplexer hardware. Just make sure both ends use matching 1330nm transceivers. By admin on 2025-11-25
Q: If we place this 1330nm transceiver on the same CWDM multiplexer filter next to a 1310nm port, will optical channel crosstalk impact transmission performance? By B***l on 2025-06-11

A: No, there is no signal interference. The transceiver uses a precision DFB laser with a narrow spectral width centered at 1330nm. Standard CWDM channel filters provide high isolation between channels, preventing light leakage into adjacent 1310nm wavelengths. By admin on 2025-06-12

Customer Reviews
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K***n

Argentina

Verified Purchase

5 .0

2026-06-22

Needed this specific 1330nm wavelength to expand network capacity over leased dark fiber. Optical budget is generous and easily handles all our patch panel connections.

73 Helpful vote Comments

C***s

Russian Federation

Verified Purchase

5 .0

2026-05-27

Excellent 20km CWDM SFP solution for our higher-education campus interconnects. Allowed us to reclaim dark fiber strands and scale up departmental bandwidth without laying costly new cables. The hardware recognized the modules immediately without manual overrides.

104 Helpful vote Comments

A***a

Morocco

Verified Purchase

5 .0

2026-05-01

Reliable Gigabit SFP module for multi-building office networks.

39 Helpful vote Comments

R***s

Brazil

Verified Purchase

5 .0

2026-04-17

Deployed this 1330nm CWDM SFP optical transceiver over a 16km fiber run between our primary data center and secondary disaster recovery site. The laser output is very stable and light levels stay well above the receiver sensitivity floor. Everything has run smoothly under heavy traffic for weeks.

126 Helpful vote Comments

S***z

Ukraine

Verified Purchase

5 .0

2026-03-11

Replaced our old failed transceivers with these modules on our warehouse uplinks. The real-time DOM monitoring makes it very easy to track optical power levels directly from our network dashboard. :D

97 Helpful vote Comments

M***n

Netherlands

Verified Purchase

5 .0

2026-02-21

Added these modules to an 8-channel optical multiplexer system for a commercial business park. The accurate 1330nm laser beam and solid receiver sensitivity gave us plenty of optical margin across multiple patch panels. An easy way to multiply fiber capacity. :-D

115 Helpful vote Comments

R***s

Norway

Verified Purchase

5 .0

2026-02-03

Solid 1330nm laser signal with zero packet dropouts so far.

46 Helpful vote Comments

B***s

Lithuania

Verified Purchase

5 .0

2026-01-30

Diagnostic monitoring works cleanly with our central network management software. Transmit and receive power levels sit right in the ideal range.

85 Helpful vote Comments

G***s

Finland

Verified Purchase

5 .0

2025-12-19

Deployed these 1.25G SFP optical modules to connect our remote business data backup storage to the main server room. Smooth link negotiation and zero packet errors. :-)

98 Helpful vote Comments

J***n

Italy

Verified Purchase

5 .0

2025-11-20

Clean 1.25G link across our business park fiber line. :)

54 Helpful vote Comments

J***s

United Arab Emirates

Verified Purchase

4 .0

2025-11-14

Good 1330nm CWDM SFP and easy to install. Delivery was two days later than the tracking estimate, but everything arrived safely.

28 Helpful vote Comments

W***n

Belgium

Verified Purchase

5 .0

2025-10-15

Perfect channel fit for our passive optical multiplexer system.

41 Helpful vote Comments

E***s

Libyan Arab Jamahiriya

Verified Purchase

5 .0

2025-10-02

Used this CWDM SFP module for a campus surveillance aggregation network. The 1330nm CWDM wavelength let us keep camera traffic separate from other services on the same fiber route. It has been stable at 1Gbps with no CRC errors after installation.

131 Helpful vote Comments

E***h

Ukraine

Verified Purchase

5 .0

2025-09-06

Broad hardware compatibility made deployment effortless across our core switching racks. Saved our IT department substantial budget compared to original factory optics.

94 Helpful vote Comments

S***s

Sweden

Verified Purchase

5 .0

2025-08-04

This is a practical 20km CWDM SFP for low-density metro extension work. We tested it on a 14km route with several patch panels and measured healthy receive levels. The PIN receiver sensitivity gave enough operating headroom for our link budget.

99 Helpful vote Comments

N***n

Hungary

Verified Purchase

5 .0

2025-07-18

Using these for a 13km single-mode fiber run between two corporate office branches. The connection has been rock solid with zero latency spikes or dropped frames.

82 Helpful vote Comments

E***l

Libyan Arab Jamahiriya

Verified Purchase

4 .0

2025-06-25

Performance is excellent on our 12 km single-mode fiber link. Shipping took longer than expected because the parcel sat with the carrier for two extra days, but the CWDM SFP itself installed cleanly and passed our acceptance test.

32 Helpful vote Comments

R***s

Iran, Islamic Republic of

Verified Purchase

5 .0

2025-06-07

Plugged right into our aggregation switch and came up immediately.

60 Helpful vote Comments

R***m

Hungary

Verified Purchase

5 .0

2025-05-08

Ordered twenty units for a hospital campus network expansion. Every single module passed our bench tests without any hardware defects. =D

82 Helpful vote Comments

S***m

Poland

Verified Purchase

5 .0

2025-04-24

Installed four LS-CW331G-20C modules in a small campus network using duplex LC patching. The 1330nm channel fit our passive CWDM plan, while the 20km reach gave us plenty of margin for buildings around the site. Switch recognition was straightforward and the DDM diagnostics are useful during handover.

75 Helpful vote Comments

M***l

Hungary

Verified Purchase

5 .0

2025-03-29

We used these transceivers to build a dedicated off-site backup link over a 16km single-mode line. Signal loss was minimal and the link quality has been completely steady. Routine automated diagnostic checks show normal operating values every day.

110 Helpful vote Comments

D***g

Spain

Verified Purchase

5 .0

2025-02-25

Great solution for municipal camera backhaul links. Signal isolation is sharp across our fiber channels with no interference on neighboring wavelengths.

71 Helpful vote Comments

J***e

Indonesia

Verified Purchase

5 .0

2025-01-29

Excellent build quality and the latch clicks firmly into place. ;)

62 Helpful vote Comments

Verified Purchase

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LINK-PP

LS-CW471G-40C

LINK-PP LS-CW471G-40C 1G SFP CWDM 1470nm 40km Duplex LC DDM SMF Optical Transceiver Module

22 Reviews
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890 Sold

SGD 64.77 ~~SGD 0.00~~

{"pid":492218,"minimum_ordered_quantity":1,"skulist":[{"pskuid":202750,"cid":752,"pid":492218,"sku":"202750","psvid1":283686,"psvid2":283688,"psvid3":0,"psvid4":0,"left_num":110,"price":"51.000","strike_price":"0.000","innercode":"","addtime":"2026-03-04 10:14:23","uptime":"2026-03-04 23:14:23","status":0}],"shippingLists":[{"id":"FedEx","name":"FedEx","logo":"res\/shipping\/FEDEX.jpg","price":"0","isfree":0,"total":"0","tax":"","datemin":"3","datemax":"10","unit_price":"51","subtotal":51}]}
LINK-PP

LS-CW491G-40C

LINK-PP LS-CW491G-40C 1G SFP CWDM 1490nm 40km Duplex LC DOM SMF Optical Transceiver Module

21 Reviews
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902 Sold

SGD 64.77 ~~SGD 0.00~~

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LINK-PP

LS-CW451G-80C

LINK-PP LS-CW451G-80C 1G SFP CWDM 1450nm 80km Duplex LC DDM SMF Optical Transceiver Module

27 Reviews
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922 Sold

SGD 63.5 ~~SGD 0.00~~

{"pid":492692,"minimum_ordered_quantity":1,"skulist":[{"pskuid":203226,"cid":752,"pid":492692,"sku":"203226","psvid1":284634,"psvid2":284636,"psvid3":0,"psvid4":0,"left_num":178,"price":"50.000","strike_price":"0.000","innercode":"","addtime":"2026-03-24 06:04:51","uptime":"2026-03-24 19:04:51","status":0}],"shippingLists":[{"id":"FedEx","name":"FedEx","logo":"res\/shipping\/FEDEX.jpg","price":"0","isfree":0,"total":"0","tax":"","datemin":"3","datemax":"10","unit_price":"50","subtotal":50}]}
LINK-PP

LS-CW451G-40C

LINK-PP LS-CW451G-40C 1G SFP CWDM 1450nm 40km Duplex LC DOM SMF Optical Transceiver Module

23 Reviews
|
922 Sold

SGD 63.5 ~~SGD 0.00~~

{"pid":492194,"minimum_ordered_quantity":1,"skulist":[{"pskuid":202726,"cid":752,"pid":492194,"sku":"202726","psvid1":283638,"psvid2":283640,"psvid3":0,"psvid4":0,"left_num":178,"price":"50.000","strike_price":"0.000","innercode":"","addtime":"2026-03-03 10:27:23","uptime":"2026-03-03 23:27:23","status":0}],"shippingLists":[{"id":"FedEx","name":"FedEx","logo":"res\/shipping\/FEDEX.jpg","price":"0","isfree":0,"total":"0","tax":"","datemin":"3","datemax":"10","unit_price":"50","subtotal":50}]}
LINK-PP

LS-CW411G-40C

LINK-PP LS-CW411G-40C 1G SFP CWDM 1410nm 40km Duplex LC DDM SMF Optical Transceiver Module

25 Reviews
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1.6K Sold

SGD 63.5 ~~SGD 0.00~~

{"pid":492144,"minimum_ordered_quantity":1,"skulist":[{"pskuid":202676,"cid":752,"pid":492144,"sku":"202676","psvid1":283538,"psvid2":283540,"psvid3":0,"psvid4":0,"left_num":132,"price":"50.000","strike_price":"0.000","innercode":"","addtime":"2026-03-02 05:49:50","uptime":"2026-03-02 18:49:50","status":0}],"shippingLists":[{"id":"FedEx","name":"FedEx","logo":"res\/shipping\/FEDEX.jpg","price":"0","isfree":0,"total":"0","tax":"","datemin":"3","datemax":"10","unit_price":"50","subtotal":50}]}
LINK-PP

LS-CW471G-80C

LINK-PP LS-CW471G-80C 1G SFP CWDM 1470nm 80km Duplex LC DOM SMF Optical Transceiver Module

26 Reviews
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890 Sold

SGD 63.5 ~~SGD 0.00~~

{"pid":492724,"minimum_ordered_quantity":1,"skulist":[{"pskuid":203258,"cid":752,"pid":492724,"sku":"203258","psvid1":284698,"psvid2":284700,"psvid3":0,"psvid4":0,"left_num":110,"price":"50.000","strike_price":"0.000","innercode":"","addtime":"2026-03-25 06:22:36","uptime":"2026-03-25 19:22:36","status":0}],"shippingLists":[{"id":"FedEx","name":"FedEx","logo":"res\/shipping\/FEDEX.jpg","price":"0","isfree":0,"total":"0","tax":"","datemin":"3","datemax":"10","unit_price":"50","subtotal":50}]}

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LINK-PP LS-CW331G-20C 1G SFP CWDM 1330nm 20km Duplex LC DOM SMF Optical Transceiver Module

Product summary

Product Details

LINK-PP LS-CW331G-20C 1G SFP Specifications

Key Features of LINK-PP LS-CW331G-20C 1G SFP

LINK-PP LS-CW331G-20C 1G SFP Optical Module

LS-CW331G-20C: 1 Gbps Connectivity for Point-to-Point Metro Links

LS-CW331G-20C Module with CWDM Technology for Fiber Efficiency

LS-CW331G-20C Module with 1330nm Wavelength

LS-CW331G-20C Module Supporting 20km Transmission

LS-CW331G-20C Module with Duplex LC Interface

LS-CW331G-20C Module with DOM for Real-Time Monitoring

LINK-PP LS-CW331G-20C 1G SFP Certification

LS-CW331G-20C Quality Testing Program

LS-CW331G-20C Quality Certifications

LS-CW331G-20C Certified for Reliable Host-Device Compatibility

Rigorous Testing Ensures Reliable SFP Performance

Optical Spectrum Test

Eye Pattern Test

Bit Error Rate Test

Temperature Test

Product Shipping for LINK-PP LS-CW331G-20C 1G SFP

Anti-Static Protective Packaging

Shock-Resistant Transport Protection

Fast Order Processing and Dispatch

Global Logistics and International Delivery

LINK-PP LS-CW331G-20C 1G SFP Usage Demonstration

LS-CW331G-20C Technical Support

Pre-Sales Technical Consultation

Compatibility Verification Support

Deployment & Installation Assistance

Long-Term Technical Assurance

LINK-PP LS-CW331G-20C 1G SFP After-Sales Assurance

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LINK-PP LS-CW331G-20C 1G SFP CWDM 1330nm 20km Duplex LC DOM SMF Optical Transceiver Module

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