We plan to slot this transceiver into an existing 8-channel passive CWDM Mux/Demux to expand building-to-building fiber capacity; does the 1530nm wavelength match standard ITU-T grid filters?

Yes, 1530nm is precisely aligned with the standard ITU-T CWDM grid. This module features a precision DFB laser and works seamlessly with standard passive CWDM Mux/Demux units, ensuring excellent channel isolation and minimal adjacent-channel crosstalk.

We have a secondary off-site SAN array running 1.063Gbps Fibre Channel for remote data replication over dark fiber — is this module compatible with that protocol?

Yes, the LS-CW531G-40C SFP module supports 1.063Gbps Fibre Channel as well as 1.25Gbps optical links. It provides stable, low-latency transmission for off-site storage replication and long-haul backup links up to 40km.

In a dense, fully loaded 48-port aggregation switch, will multiple LS-CW531G-40C modules running simultaneously stay within safe operating temperature limits?

Yes, the module features low power consumption on a standard +3.3V supply and dissipates heat very efficiently. As long as your rack cabinet maintains standard indoor data center airflow, the internal temperature will remain well within the 0°C to +70°C range.

We are connecting two data closets located 30km apart over outdoor dark fiber — what exact fiber cable and connector type do we need for this module?

This module requires standard single-mode fiber terminated with a duplex LC connector. It offers an optical budget sufficient for links up to 40km; for your 30km run, please verify that your total end-to-end link loss (including splices and patch panels) does not exceed the module's maximum loss budget.

We are rolling out a campus-wide optical refresh across several sites and need to outfit dozens of switch ports — do you offer project pricing for larger deployments?

Yes, we provide tiered discounts for high-density optical transceiver deployments. Simply contact our sales team with your estimated module count to receive a customized volume quotation for your network buildout.

Breadcrumb: Home; Products; Optics Transceivers | SFP Modules; 1/2/4G Transceiver Modules; 1G CWDM/DWDM SFP; 202828

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LINK-PP LS-CW531G-40C 1G SFP CWDM 1530nm 40km Duplex LC DDM SMF Optical Transceiver Module

Name: LINK-PP LS-CW531G-40C 1G SFP CWDM 1530nm 40km Duplex LC DDM SMF Optical Transceiver Module
Brand: LINK-PP
SKU: 202828
Price: 43.86 USD
Availability: InStock
Rating: 4.9 (30 reviews)

Product: LINK-PP LS-CW531G-40C 1G SFP CWDM 1530nm 40km Duplex LC DDM SMF Optical Transceiver Module
SKU: 202828
P/N: LS-CW531G-40C
Price: $ 51
Stock: 110 in Stock
Sold: 890
Product URL: https://www.l-p.com/products/492296.htm

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

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Manufacture: LINK-PP P/N: LS-CW531G-40C SKU: 202828

Compatible:: Cisco; LINK-PP; Alcatel-Lucent; Arista; Avaya; Brocade; Dell; Extreme; H3C; HPE; HW; Juniper; Mikrotik; Netgear

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-CW531G-40C 1G SFP Specifications

For the LS-CW531G-40C 1530nm CWDM module, the optical design pairs a DFB laser with a PIN photodiode, both optimized for single-mode fiber operation over a maximum reach of 40km. Real-time DDM is implemented as a standard feature, offering dynamic readouts of five key diagnostic parameters without interrupting traffic. The module operates from a single 3.3 V supply, uses a standard LC duplex connector, and is specified for an operating temperature range of 0°C to 70°C.

LINK-PP Part Number	LS-CW531G-40C	Vendor Name	LINK-PP
Form Factor	SFP	Max Data Rate	1.25Gbps
Wavelength	1530nm	Max Cable Distance	40km
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 Support	Yes
Operating Temperature Range	0 to 70°C	Protocols	SFP MSA、SFF-8472

Key Features of LINK-PP LS-CW531G-40C 1G SFP

LINK-PP LS-CW531G-40C is a hot-pluggable 1G SFP transceiver that brings together CWDM wavelength assignment, extended 40 km reach, and real-time diagnostic functions. It supports standard duplex LC cabling and fully complies with the SFP MSA for seamless deployment in existing systems.

LINK-PP LS-CW531G-40C 1G SFP Optical Module

This SFP module features a hot-pluggable mechanical design and follows the SFP Multi-Source Agreement pinout and interface specifications. It can be inserted or removed while the host equipment remains powered, simplifying field maintenance.

LS-CW531G-40C: 1 Gbps Connectivity for Inter-building Trunk Connections

Operating at a line rate of 1Gb/s, this module delivers Gigabit Ethernet connectivity for trunk links that span between separate buildings. Its typical deployment includes campus or enterprise networks requiring point-to-point connections.

LS-CW531G-40C Module with CWDM Technology for Fiber Efficiency

CWDM technology allows this module to operate on a specific wavelength channel within an 18-channel grid (1270–1610nm). By using different channels, multiple transceivers can share the same fiber pair, increasing overall link capacity without laying new cables.

LS-CW531G-40C Module with 1530nm Wavelength

The selected 1530nm channel falls in the lower-loss region of standard single-mode fibers, which helps maintain signal integrity over long distances. This wavelength is also allocated for CWDM systems, ensuring compatibility with standard multiplexers.

LS-CW531G-40C Module Supporting 40km Transmission

This transceiver is specified for fiber spans up to 40km, covering medium to long distance routes. Its optical power budget is designed to overcome the loss inherent in such long single-mode links.

LS-CW531G-40C Module with Duplex LC Interface

Its duplex LC connector provides a secure, polarized connection for both transmit and receive fibers in one small footprint. This interface is widely adopted in patch panels and distribution frames, ensuring easy cable assembly.

LS-CW531G-40C Module with DDM for Real-Time Monitoring

Internal digital diagnostic monitoring (DDM) function tracks operating temperature, supply voltage, laser bias current, and both TX/RX optical power. The module implements the SFF-8472 standard, allowing host systems to read these parameters via the I²C bus for proactive link management.

LINK-PP LS-CW531G-40C 1G SFP Certification

The LS-CW531G-40C 1G SFP optical transceiver holds major international safety and quality approvals, including ISO 9001, CE, RoHS, and FCC. These certifications ensure that the product meets high standards for performance, safety, and environmental protection.

LS-CW531G-40C Quality Testing Program

Every module undergoes strict physical and performance testing before leaving the factory. This comprehensive process guarantees long-term stability and optimal efficiency in demanding network environments.

LS-CW531G-40C Quality Certifications

Official compliance verifies that the transceiver meets international regulatory and technical standards. These recognized qualifications validate the module's adherence to required operational and safety guidelines.

LS-CW531G-40C Certified for Reliable Host-Device Compatibility

The transceiver is fully tested and verified to work seamlessly across a wide range of brand-name switches and routers. This ensures hassle-free plug-and-play integration into your existing network infrastructure.

Rigorous Testing Ensures Reliable SFP Performance

Every LS-CW531G-40C SFP transceiver undergoes strict testing to ensure stable network performance. Discover our full validation process at the LINK-PP Test Support Center.

Rigorous Testing Ensures Reliable Transceiver Performance

Optical Spectrum Test

Verify optical wavelength and central peak power to meet optical standards.

Eye Pattern Test

Measure optical signal quality and noise margins to ensure clear transmission.

Bit Error Rate Test

Evaluate packet loss and transmission accuracy to maintain line-rate data stability.

Temperature Test

Monitor operational stability under extreme environmental conditions to verify heat tolerance.

Product Shipping for LINK-PP LS-CW531G-40C 1G SFP

Secure packaging protects every LS-CW531G-40C 1G SFP module during transit. Fast global dispatch ensures reliable and timely delivery.

Anti-Static Protective Packaging

Shield delicate electronic components against electrostatic discharge damage.

Shock-Resistant Transport Protection

Protect modules from physical impacts during transit handling.

Fast Order Processing and Dispatch

Prepare and ship orders quickly to shorten total delivery times.

Global Logistics and International Delivery

Transport shipments reliably across borders using trusted worldwide carriers.

LINK-PP LS-CW531G-40C 1G SFP Usage Demonstration

To install the LS-CW531G-40C 1530nm CWDM module, insert it into an SFP port and connect duplex LC fiber to a CWDM Mux/Demux. This transceiver enables long-distance, high-capacity inter-building trunk connections, linking corporate data centers and enterprise campuses efficiently over single-mode fiber infrastructure.

LS-CW531G-40C 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-CW531G-40C 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-CW531G-40C 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-CW531G-40C Wavelength: 1530nm	LS-CW531G-80C Wavelength: 1530nm	LS-CW611G-40C Wavelength: 1610nm	LS-CW591G-40C Wavelength: 1590nm	LS-CW571G-40C Wavelength: 1570nm	LS-CW551G-40C Wavelength: 1550nm

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	1530nm	1530nm	1610nm	1590nm	1570nm	1550nm
Connector	Duplex LC	Duplex LC	Duplex LC	Duplex LC	Duplex LC	Duplex LC
Cable Distance (Max)	40km	80km	40km	40km	40km	40km
Cable Type	SMF	SMF	SMF	SMF	SMF	SMF
TX Power	-5 to 0dBm	-1 to +4dBm	-5 to 0dBm	-5 to 0dBm	-5 to 0dBm	-5 to 0dBm
Receiver Sensitivity	-24dBm	-26dBm	-24dBm	-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	0 to 70°C	Commercial	0 to 70°C	Commercial
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 Support	Yes	Yes	Yes	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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Q: We plan to slot this transceiver into an existing 8-channel passive CWDM Mux/Demux to expand building-to-building fiber capacity; does the 1530nm wavelength match standard ITU-T grid filters? By B***s on 2026-05-21

A: Yes, 1530nm is precisely aligned with the standard ITU-T CWDM grid. This module features a precision DFB laser and works seamlessly with standard passive CWDM Mux/Demux units, ensuring excellent channel isolation and minimal adjacent-channel crosstalk. By admin on 2026-05-22
Q: We have a secondary off-site SAN array running 1.063Gbps Fibre Channel for remote data replication over dark fiber — is this module compatible with that protocol? By T***n on 2026-03-05

A: Yes, the LS-CW531G-40C SFP module supports 1.063Gbps Fibre Channel as well as 1.25Gbps optical links. It provides stable, low-latency transmission for off-site storage replication and long-haul backup links up to 40km. By admin on 2026-03-06
Q: In a dense, fully loaded 48-port aggregation switch, will multiple LS-CW531G-40C modules running simultaneously stay within safe operating temperature limits? By C***k on 2025-12-22

A: Yes, the module features low power consumption on a standard +3.3V supply and dissipates heat very efficiently. As long as your rack cabinet maintains standard indoor data center airflow, the internal temperature will remain well within the 0°C to +70°C range. By admin on 2025-12-23
Q: We are connecting two data closets located 30km apart over outdoor dark fiber — what exact fiber cable and connector type do we need for this module? By S***t on 2025-07-13

A: This module requires standard single-mode fiber terminated with a duplex LC connector. It offers an optical budget sufficient for links up to 40km; for your 30km run, please verify that your total end-to-end link loss (including splices and patch panels) does not exceed the module's maximum loss budget. By admin on 2025-07-14
Q: We are rolling out a campus-wide optical refresh across several sites and need to outfit dozens of switch ports — do you offer project pricing for larger deployments? By M***e on 2025-03-20

A: Yes, we provide tiered discounts for high-density optical transceiver deployments. Simply contact our sales team with your estimated module count to receive a customized volume quotation for your network buildout. By admin on 2025-03-21

Customer Reviews
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S***r

Republic of Korea

Verified Purchase

5 .0

2026-06-14

Laser bias current and receiver sensitivity are strictly within spec; running cool in our top-of-rack layout.

55 Helpful vote Comments

R***n

South Africa

Verified Purchase

5 .0

2026-06-02

Running a 36km link to a remote site with these1G CWDM modules. The PIN receiver is plenty sensitive for our budget and the link has been rock solid for three months now. No CRC errors on the switch side. Great little workhorse.

75 Helpful vote Comments

G***e

France

Verified Purchase

5 .0

2026-05-11

We slotted this unit into our multi-channel CWDM passive Mux for long-reach inter-building routing. Real-time DDM telemetry accurately outputs Tx power and temperature stats straight to our SNMP monitoring dashboard. Very stable hardware.

88 Helpful vote Comments

B***h

New Zealand

Verified Purchase

5 .0

2026-05-02

We installed these optical modules in our distribution racks to link multiple remote municipal facilities over a 30km single-mode fiber run. The physical build quality is excellent, and the duplex LC interface clicks into place securely with no loose play. We conducted several failover drills and reboot cycles during scheduled maintenance, and the transceivers re-established the gigabit link within seconds every single time. It is great to find commercial-grade optics that deliver this level of long-term reliability and straightforward plug-and-play operation for regional enterprise links.

99 Helpful vote Comments

X***t

Russian Federation

Verified Purchase

5 .0

2026-04-05

Excellent performance inside our conditioned indoor aggregation cabinets. The latching bail mechanism is sturdy and easy to release even in tightly spaced patch panels. Well-built commercial-grade transceiver.

97 Helpful vote Comments

M***e

Netherlands

Verified Purchase

5 .0

2026-03-21

Swapped out our exhausted direct-fiber patch cords with an 8-channel Mux setup, and this 1530nm module handled the longest 35km link seamlessly. Rx optical power settled comfortably at -16 dBm. Very satisfied with the build quality.

109 Helpful vote Comments

D***e

Poland

Verified Purchase

5 .0

2026-03-04

We run a regional ISP and use these for base station backhaul aggregation. The 1530nm channel is one of eight CWDM wavelengths in our Mux, and this module has been the most stable of the lot. I checked the transmit and receive power against our optical test gear and everything was well within spec. The SFP MSA compliance means they work in every brand of switch we've thrown at them, from core to access. DDM data is clean and consistent, which makes fault isolation way easier. We've ordered three batches now and QC has been flawless across all of them. If you need a dependable 40km 1G CWDM SFP for carrier-style links, this is it.

104 Helpful vote Comments

Y***n

Ukraine

Verified Purchase

4 .0

2026-02-24

The 1530nm link synced on the first try with zero errors, though the outer shipping envelope had a small tear from handling. The internal packaging protected the module fine.

31 Helpful vote Comments

C***m

Italy

Verified Purchase

5 .0

2026-02-16

Outstanding drop-in replacement for standard long-haul optics. We expanded our site-to-site SAN replication bandwidth over existing dark fiber without having to lease additional physical strands. Everything works straight out of the packaging box.

100 Helpful vote Comments

O***e

India

Verified Purchase

5 .0

2026-02-03

Flawless 1G CWDM 40km reach on single-mode fiber patch cables. (•‿•)

44 Helpful vote Comments

J***l

Japan

Verified Purchase

5 .0

2026-01-27

Best cost-to-performance ratio for building out multiplexed metro fiber loops.

74 Helpful vote Comments

L***k

Singapore

Verified Purchase

5 .0

2025-12-18

Perfect option for cellular base station backhaul over CWDM multiplexers. Receiver sensitivity is sharp, power dissipation is minimal, and our link monitoring logs show perfectly flat signal integrity over the past two months.

115 Helpful vote Comments

O***t

United Kingdom

Verified Purchase

5 .0

2025-12-04

Deployed these 1530nm 40km transceivers across an expanded municipal Ethernet ring. The duplex LC connectors seat firmly with a satisfying click, and the optical link budget easily covers our 31km span with plenty of headroom remaining. Highly recommend for regional network upgrades!

102 Helpful vote Comments

E***k

Austria

Verified Purchase

5 .0

2025-11-28

I'm a network engineer and I run a fleet of these across a multi-building campus. I bought a batch for a fiber backbone refresh and tested every single one before deployment. All of these 1G CWDM modules passed our signal quality and error-rate checks, and the DDM telemetry matched our reference equipment — the transmit and receive power readings were spot on. The 1530nm CWDM wavelength fits perfectly into our existing Mux/Demux plan, so I didn't have to touch the passive infrastructure. Two months in, not one module has failed or dropped the link. For the price per unit, this is the best value 40km SFP I've deployed this year.

107 Helpful vote Comments

M***n

Brazil

Verified Purchase

5 .0

2025-11-18

Solid 1530nm CWDM channel optics; exact optical power matching and clean DDM readouts.

73 Helpful vote Comments

F***m

Thailand

Verified Purchase

5 .0

2025-10-23

Using them for a small campus fiber backbone. The SFF-8472 DDM gives us real-time TX/RX power, which saved us once when a dirty connector showed up in the readings before it became a problem. Solid value for a 40km single-mode module.

66 Helpful vote Comments

E***l

Australia

Verified Purchase

5 .0

2025-10-08

Great thermal efficiency! Even in a high-density aggregation switch environment, the internal module temperature stays steady around 38°C.

83 Helpful vote Comments

N***e

Finland

Verified Purchase

4 .0

2025-09-17

Solid wavelength stability and immediate link-up on our inter-building fiber loop. The only slight inconvenience was that international customs cleared the parcel two days later than estimated, which slightly delayed our maintenance schedule. Great SFP modules otherwise!

35 Helpful vote Comments

C***s

Spain

Verified Purchase

5 .0

2025-09-02

Clean eye-diagram performance and very tight wavelength stability at 1530nm. We stress-tested the link for 48 continuous hours using an RFC 2544 traffic generator, and it maintained zero dropped frames throughout.

138 Helpful vote Comments

N***y

Malaysia

Verified Purchase

5 .0

2025-08-31

We recently expanded our regional fiber network to connect eight branch offices across town using a multi-channel CWDM multiplexer setup over single-mode fiber. The LS-CW531G-40C dropped right into our aggregation switches, locked onto the 1530nm channel immediately, and established a solid link across our entire 32km span without any manual configuration. The built-in DDM telemetry reports live operating temperatures and transceiver health directly to our monitoring system without missing a beat. After running heavy multi-site data traffic through the link for several days straight, we haven't seen a single dropped frame or connection drop. If you need dependable long-reach optics that just work, this module delivers.

156 Helpful vote Comments

H***m

United States

Verified Purchase

5 .0

2025-08-09

Solid Gigabit Ethernet CWDM link over our dedicated leased dark fiber trunk.

79 Helpful vote Comments

Q***r

Norway

Verified Purchase

5 .0

2025-07-25

Used these CWDM modules to tie remote outdoor IP surveillance nodes back to the central security server room over a 29km perimeter fiber path. The duplex LC interface has zero optical reflection issues and locks tight.

72 Helpful vote Comments

V***g

Canada

Verified Purchase

5 .0

2025-06-30

These SFP CWDM modules solved our fiber scarcity issue between two branch data closets located 30km apart. Both channels lit up immediately across our single-mode backbone with zero CRC errors or frame loss under heavy peak loads.

121 Helpful vote Comments

U***n

Indonesia

Verified Purchase

5 .0

2025-06-12

We deployed these 1530nm CWDM transceivers to connect our main corporate data center with a secondary disaster recovery site roughly 27km away. Our main goal was to scale our bandwidth without leasing extra dark fiber strands, and these optics integrated cleanly into our existing passive mux setup. Port negotiation was instantaneous at full gigabit speed, and the wavelength accuracy is rock solid with zero interference from neighboring channels. Even during peak hours with high backup traffic running across the fiber, the connection stays smooth and responsive. It has proven to be a very stable and cost-effective upgrade for our infrastructure.

121 Helpful vote Comments

J***e

Sweden

Verified Purchase

5 .0

2025-05-19

Our suburban school district needed a dependable optical interconnect between the main server room and our secondary facility. The 1G 40km duplex LC transceiver integrated cleanly into our existing layer-3 switch hardware without any firmware hiccups.

151 Helpful vote Comments

L***g

Romania

Verified Purchase

4 .0

2025-05-03

The module linked up instantly at 1530nm with zero issues, but the shipping carrier was delayed by two days during transit. Luckily, the packaging kept everything safe.

39 Helpful vote Comments

A***e

Mexico

Verified Purchase

5 .0

2025-04-22

Zero transceiver coding errors on our aggregation switches — pure plug-and-play simplicity.

62 Helpful vote Comments

P***s

Belgium

Verified Purchase

5 .0

2025-04-07

We integrated several of these transceivers into our SAN and off-site backup system linking two facilities located across the metro area. The hot-pluggable design let us install the modules during live production hours without causing any service interruptions or switch reboots. Real-time diagnostic monitoring works smoothly in our network dashboard, and latency over the 34km line has stayed consistently low with zero packet jitter. For enterprise teams looking to maximize their fiber assets without unnecessary complexity, these modules are a top-notch choice.

133 Helpful vote Comments

F***t

Philippines

Verified Purchase

5 .0

2025-02-28

Ordered an initial batch of 10 units for our metro fiber ring upgrade. Every single transceiver passed our testing with exact optical center wavelengths before deployment. Exceptional QA standards. (•̀ᴗ•́)

85 Helpful vote Comments

Z***n

Germany

Verified Purchase

5 .0

2025-01-15

1530nm CWDM channel locked in perfect. No fuss at all.

53 Helpful vote Comments