Can we hot-swap this 10G SFP+ module on a live trunk port without triggering an interface reset on adjacent ports?

Yes, it has a hot-pluggable SFP+ footprint, allowing safe insertion or removal without rebooting the switch or interrupting neighboring traffic.

How does the 1490nm channel behave when multiplexed along with other CWDM wavelengths on a single fiber pair?

The cooled EML laser maintains a tight spectral grid, ensuring clear channel isolation without bleedover into neighboring 1470nm or 1510nm channels on your MUX tray.

Can we patch this LS-CW4910-20C CWDM module directly into an existing 8-channel passive CWDM MUX tray?

Yes, as long as your passive MUX tray includes a designated 1490nm wavelength channel, it will filter and combine cleanly with zero crosstalk.

Our link runs over 18km of older OS1 single-mode fiber with a couple of patch panels — will this EML transmitter reach?

It should cover the distance under normal conditions, but you'll want to calculate your total optical loss budget first. While the EML laser is rated for 20km over SMF, older OS1 fiber and extra patch panel splices add attenuation — if total link loss stays under the module's rated power margin, the connection will hold stable.

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LINK-PP LS-CW4910-20C 10G SFP+ CWDM 1490nm 20km Duplex LC DOM SMF Optical Transceiver Module

Name: LINK-PP LS-CW4910-20C 10G SFP+ CWDM 1490nm 20km Duplex LC DOM SMF Optical Transceiver Module
Brand: LINK-PP
SKU: 188927
Price: 233.06 USD
Availability: InStock
Rating: 4.9 (42 reviews)

# 188927

Product: LINK-PP LS-CW4910-20C 10G SFP+ CWDM 1490nm 20km Duplex LC DOM SMF Optical Transceiver Module
SKU: 188927
P/N: LS-CW4910-20C
Price: $ 271
Stock: 698 in Stock
Sold: 552
Product URL: https://www.l-p.com/products/483231.htm

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Compatible:: Cisco; LINK-PP; Brocade; Ciena; Dell; FS; Generic; H3C; Juniper

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

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LINK-PP LS-CW4910-20C 10G SFP+ Specifications

LS-CW4910-20C functions as a CWDM 10G SFP+ optical transceiver at 1490nm, featuring a cooled EML laser and PIN photodiode architecture, enabling duplex LC transmission over single-mode fiber for distances reaching 20km, with integrated real-time digital optical monitoring for detailed operational assessment.

LINK-PP Part Number	LS-CW4910-20C	Vendor Name	LINK-PP
Form Factor	SFP+	Max Data Rate	10.7Gbps
Wavelength	1490nm	Max Cable Distance	20km
Connector	Duplex LC	Media	SMF
Transmitter Type	EML	Receiver Type	PIN
TX Power	-1 to +5dBm	RX Power	-23 to -6dBm
Receiver Sensitivity	<-16dBm	DOM Support	Yes
Operating Temperature Range	0 to 70°C	Protocols	SFP+ MSA Compliant, CPRI, eCPRI, ITU-T G.652

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Q: Can we hot-swap this 10G SFP+ module on a live trunk port without triggering an interface reset on adjacent ports? By G***n on 2026-03-12

A: Yes, it has a hot-pluggable SFP+ footprint, allowing safe insertion or removal without rebooting the switch or interrupting neighboring traffic. By admin on 2026-03-13
Q: How does the 1490nm channel behave when multiplexed along with other CWDM wavelengths on a single fiber pair? By B***s on 2025-10-25

A: The cooled EML laser maintains a tight spectral grid, ensuring clear channel isolation without bleedover into neighboring 1470nm or 1510nm channels on your MUX tray. By admin on 2025-10-26
Q: Can we patch this LS-CW4910-20C CWDM module directly into an existing 8-channel passive CWDM MUX tray? By K***g on 2025-06-13

A: Yes, as long as your passive MUX tray includes a designated 1490nm wavelength channel, it will filter and combine cleanly with zero crosstalk. By admin on 2025-06-14
Q: Our link runs over 18km of older OS1 single-mode fiber with a couple of patch panels — will this EML transmitter reach? By J***y on 2025-01-30

A: It should cover the distance under normal conditions, but you'll want to calculate your total optical loss budget first. While the EML laser is rated for 20km over SMF, older OS1 fiber and extra patch panel splices add attenuation — if total link loss stays under the module's rated power margin, the connection will hold stable. By admin on 2025-01-31

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M***r

Ukraine

Verified Purchase

5 .0

2026-05-07

We installed these LS-CW4910-20C CWDM modules as part of a campus fiber consolidation project. The design uses a CWDM MUX/DEMUX system and existing single-mode fiber to carry separate 10GbE links between the core site and multiple buildings. The 1490nm channel was selected because it was available in our wavelength plan, while the actual fiber routes ranged from 12.6 to 17.2km. During turn-up, we checked the DOM/DDM values for module temperature, supply voltage, laser bias, TX power, and RX power. All links had stable receive levels within our calculated optical budget, and no CRC errors or link resets appeared during extended traffic testing. The SFP+ form factor and Duplex LC interface also made the hardware replacement simple for our field team. For indoor enterprise CWDM transport, these have been reliable and easy to validate.

117 Helpful vote Comments

P***z

Thailand

Verified Purchase

5 .0

2026-04-22

We used this 1490nm 10G SFP+ CWDM module to connect two office buildings on existing single-mode fiber. The route is just under 14km and the link came up cleanly at 10Gbps with stable DOM values. A practical choice when you need more capacity without pulling additional fiber.

91 Helpful vote Comments

D***s

Indonesia

Verified Purchase

5 .0

2026-03-09

We deployed a small batch across several customer sites where dark fiber was already available. Every module linked at 10G on standard G.652 single-mode fiber, and the DOM monitoring made acceptance testing much faster. Good commercial-grade 10G CWDM optical transceivers for indoor network projects.

95 Helpful vote Comments

L***n

Bulgaria

Verified Purchase

4 .0

2026-03-04

No technical issues — the modules linked at 10G and fit our duplex LC CWDM installation as planned. I am giving four stars only because the delivery tracking updated later than expected. The hardware itself was exactly what we ordered.

20 Helpful vote Comments

E***e

Italy

Verified Purchase

5 .0

2026-02-27

Installed these 10G CWDM modules on a 16km OS2 link, and both optical readings look great.

65 Helpful vote Comments

D***e

Poland

Verified Purchase

5 .0

2026-02-19

The built-in digital optical monitoring feature gives us exact Rx power readings and operating temperature metrics. It makes troubleshooting physical layer link health across our 15km fiber span super straightforward.

83 Helpful vote Comments

C***n

Israel

Verified Purchase

4 .0

2026-01-15

The modules arrived safely and matched the requested 1490nm CWDM specification. Tracking information was not updated for part of the journey, but the final delivery was still completed without any problem.

21 Helpful vote Comments

E***n

Singapore

Verified Purchase

5 .0

2026-01-04

Tx and Rx power levels were perfectly balanced across our 15km single-mode fiber link.

79 Helpful vote Comments

N***r

Austria

Verified Purchase

5 .0

2025-12-08

We tested the module in a mixed-vendor environment after confirming the required coding before shipment. It established a stable 10G link and did not show alarms during our packet-loss and throughput tests. For a CWDM 1490nm 20km link, it delivered what we needed.

94 Helpful vote Comments

C***r

Denmark

Verified Purchase

4 .0

2025-11-22

These 10G CWDM SFP+ modules were well protected in sealed anti-static packaging. We received the order a day later than planned because of carrier handling, but there was no damage and no missing items.

35 Helpful vote Comments

D***r

South Africa

Verified Purchase

5 .0

2025-11-11

Ordered these 10G optical modules for a CWDM upgrade in a private data center environment. The Duplex LC connection was straightforward, and the modules reported temperature, voltage, TX power, RX power, and bias current correctly through the switch diagnostics page. Nice to have that visibility during commissioning.

118 Helpful vote Comments

R***y

Spain

Verified Purchase

5 .0

2025-10-29

Fast 10G connection on our 1490nm CWDM circuit — no setup surprises.

58 Helpful vote Comments

D***h

Turkey

Verified Purchase

5 .0

2025-10-05

We purchased these for a phased data center interconnect project, where the goal was to add 10G capacity on existing fiber rather than lease more strands. The module’s 1490nm wavelength, 20 km SMF reach, and SFP+ MSA compliance aligned with the design requirements. Before deployment, our team ran compatibility checks and verified that each unit was coded for the intended host environment. The installation process was straightforward: insert the modules, connect Duplex LC single-mode fiber, clean the end faces, confirm wavelength alignment through the CWDM MUX, and review the DOM readings. In production, the modules have maintained stable 10Gbps operation with no packet-loss events attributed to the optics. The ability to view TX/RX optical power has been especially useful for preventive maintenance and troubleshooting patch-panel issues. For building a 10G CWDM campus or metro link, this is a sensible commercial-grade option.

129 Helpful vote Comments

M***r

Finland

Verified Purchase

5 .0

2025-09-21

We hooked these up to a passive 8-channel CWDM multiplexer tray on the 1490nm port. The spectral stability is tight, preventing any cross-channel interference on adjacent wavelengths.

67 Helpful vote Comments

D***s

Philippines

Verified Purchase

5 .0

2025-08-04

The latch mechanism feels solid, and the duplex LC patch cables click in smoothly.

76 Helpful vote Comments

O***t

New Zealand

Verified Purchase

5 .0

2025-07-19

Our campus needed a 1490nm 10G CWDM SFP+ module for one of the remaining open channels on the MUX. This transceiver matched the wavelength plan and worked well over OS2 SMF with duplex LC patching. Installation was routine and the diagnostics were available right away.

84 Helpful vote Comments

M***r

Ireland

Verified Purchase

5 .0

2025-06-25

We paired these 1490nm CWDM SFP+ optical transceivers with a passive CWDM MUX/DEMUX chassis to consolidate multiple 10G links over a single dark fiber pair. Sensitivity on the receiver end handled attenuation comfortably, even after routing through two patch panels and a fiber splice tray. Real-time DDM optical power readouts allowed our monitoring system to trigger precise health alerts without needing external inline optical taps. The physical construct of the metal casing ensures efficient passive heat sinking. It proved to be a reliable, cost-effective building block for our regional network expansion.

124 Helpful vote Comments

R***n

Norway

Verified Purchase

5 .0

2025-06-18

DOM monitoring is accurate and made fiber acceptance testing much easier.

61 Helpful vote Comments

D***n

Belgium

Verified Purchase

5 .0

2025-05-14

Good fit for high-density SFP+ switch deployments. The modules seated properly, ran cool in our indoor racks, and reported sensible optical levels during burn-in. We especially liked having a 20km 10G CWDM module instead of overbuilding the link with a longer-reach part.

102 Helpful vote Comments

L***k

Hungary

Verified Purchase

4 .0

2025-04-28

The product packaging protected the transceivers properly, and every 10G CWDM module passed our incoming inspection. One corner of the master carton was compressed, so stronger outer-box protection would be helpful for international shipments.

33 Helpful vote Comments

R***z

Russian Federation

Verified Purchase

5 .0

2025-03-24

Real-time optical diagnostic data renders accurately in our network management CLI.

87 Helpful vote Comments

D***s

Romania

Verified Purchase

5 .0

2025-02-05

We pushed this 1490nm CWDM SFP+ module close to its rated 20km limit on an outdoor fiber plant. Signal attenuation stayed well within operational thresholds, ensuring solid bit-error-rate stability.

75 Helpful vote Comments

P***l

Malaysia

Verified Purchase

5 .0

2025-01-08

This LS-CW4910-20C CWDM SFP module is doing 10G backhaul between our aggregation room and a remote indoor radio hub. The 1490nm wavelength fits our CWDM channel plan, and the 20km reach gave us enough headroom for the actual fiber path. No link flaps after several weeks.

121 Helpful vote Comments

K***k

Bangladesh

Verified Purchase

5 .0

2024-10-28

Always been reliable.

101 Helpful vote Comments

R***d

Iran, Islamic Republic of

Verified Purchase

5 .0

2024-10-25

Great Product Great Service

34 Helpful vote Comments

D***s

United States

Verified Purchase

5 .0

2024-09-05

It’s not my first time dealing with this company but i’m just satisfied as usual.

43 Helpful vote Comments

N***i

United States

Verified Purchase

5 .0

2024-09-04

Great ricing, awesome customer service!!

39 Helpful vote Comments

J***n

Brunei Darussalam

Verified Purchase

5 .0

2024-09-01

On time delivery and LINK-PP always has great customer service!

70 Helpful vote Comments

L***n

Sweden

Verified Purchase

5 .0

2024-07-18

Needs another way to send the goods because Fedex is Fast but very expensive.

23 Helpful vote Comments

M***s

Hong Kong

Verified Purchase

5 .0

2024-07-13

cheap and high quality. The items arrived a day earlier than expected and were all correct and easy to install. The customer service is great, the confirmation and delivery emails are worth just buying something again.

12 Helpful vote Comments

P***i

Brazil

Verified Purchase

5 .0

2024-02-28

Higher shipping charge fee. No other complaints.

42 Helpful vote Comments

R***n

Spain

Verified Purchase

5 .0

2024-02-20

You offer the best prices anywhere, and your web site is easy to use.

58 Helpful vote Comments

M***r

United States

Verified Purchase

5 .0

2024-02-02

Found through Google. I had a few question and they were answered within a few hours. Placed an order, then added something to it easily.

81 Helpful vote Comments

J***e

France

Verified Purchase

5 .0

2024-01-19

So far, works as expected. I have bought a few spares sitting on the shelf just in case.

11 Helpful vote Comments

D***n

Finland

Verified Purchase

5 .0

2024-01-16

There were nothing to complain for this online shopping transaction, nice service and good products. It was quick, easy, with merchandise offered in great selections at competitive prices. Also, I'd like to express my thanks for the Account Manager She is really patient and helpful.

19 Helpful vote Comments

U***n

Norway

Verified Purchase

5 .0

2023-09-13

Quality 100G QSFP28 Optical Transceiver Module.Worked very well.

86 Helpful vote Comments

P***z

United Kingdom

Verified Purchase

5 .0