Is the 20km reach guaranteed if our dark fiber run has multiple splice points and patch panels?

The 20km rating represents maximum reach under ideal fiber conditions. For routes with multiple splices and patch panels, you should calculate your total link attenuation — including insertion losses — and ensure it falls comfortably within the module's optical power budget.

Our top-of-rack switches run fairly warm inside dense server racks. Will internal heating degrade the CWDM module's performance?

No, the LS-CW5710-20C 10G CWDM module is engineered to prevent thermal degradation. Its built-in cooled EML laser and PIN photodiode maintain a stable optical power output, precise 1570nm wavelength accuracy, and error-free line-rate performance up to its full +70°C operating limit.

Can this 10G CWDM module handle CPRI traffic for cell tower baseband unit (BBU) fronthaul links?

Yes, the LS-CW5710-20C optical transceiver supports bit rates up to 10.7Gbps, easily covering the CPRI line rates commonly used in LTE and wireless fronthaul deployments.

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FS CWDM-SFP10G-20L Compatible LINK-PP 10G SFP+ CWDM 1570nm 20km Duplex LC DOM SMF Optical Transceiver Module

Name: FS CWDM-SFP10G-20L Compatible LINK-PP 10G SFP+ CWDM 1570nm 20km Duplex LC DOM SMF Optical Transceiver Module
Brand: LINK-PP
SKU: 222455
Price: 233.06 USD
Availability: InStock
Rating: 4.9 (28 reviews)

# 222455

Product: FS CWDM-SFP10G-20L Compatible LINK-PP 10G SFP+ CWDM 1570nm 20km Duplex LC DOM SMF Optical Transceiver Module
SKU: 222455
P/N: LS-CW5710-20C
Price: $ 271
Stock: 636 in Stock
Sold: 645
Product URL: https://www.l-p.com/products/494664.htm

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Manufacture: LINK-PP

P/N: LS-CW5710-20C

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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FS CWDM-SFP10G-20L Compatible LINK-PP 10G SFP+ Specifications

CWDM-SFP10G-20L functions as a 1570nm 10G SFP+ CWDM transceiver that leverages a cooled EML laser and PIN photodiode architecture, supports transmission distances up to 20km over single-mode fiber via duplex LC interface, and provides digital optical monitoring for continuous operational insight.

FS Part Number	CWDM-SFP10G-20L	Vendor Name	LINK-PP
Form Factor	SFP+	Max Data Rate	10.7Gbps
Wavelength	1570nm	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	Receiver Overload	0dBm
Operating Temperature Range	0 to 70°C	Protocols	SFP+ MSA Compliant, CPRI, eCPRI, ITU-T G.652

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Q: Is the 20km reach guaranteed if our dark fiber run has multiple splice points and patch panels? By A***n on 2026-02-16

A: The 20km rating represents maximum reach under ideal fiber conditions. For routes with multiple splices and patch panels, you should calculate your total link attenuation — including insertion losses — and ensure it falls comfortably within the module's optical power budget. By admin on 2026-02-17
Q: Our top-of-rack switches run fairly warm inside dense server racks. Will internal heating degrade the CWDM module's performance? By D***x on 2025-11-08

A: No, the LS-CW5710-20C 10G CWDM module is engineered to prevent thermal degradation. Its built-in cooled EML laser and PIN photodiode maintain a stable optical power output, precise 1570nm wavelength accuracy, and error-free line-rate performance up to its full +70°C operating limit. By admin on 2025-11-09
Q: Can this 10G CWDM module handle CPRI traffic for cell tower baseband unit (BBU) fronthaul links? By M***s on 2025-09-23

A: Yes, the LS-CW5710-20C optical transceiver supports bit rates up to 10.7Gbps, easily covering the CPRI line rates commonly used in LTE and wireless fronthaul deployments. By admin on 2025-09-24

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I***e

Brunei Darussalam

Verified Purchase

5 .0

2026-05-18

The LS-CW5710-20C 10G CWDM modules passed all line-rate verification audits prior to live cutover. SFP+ port negotiation was instantaneous, and optical transmit levels remained consistent across all installed modules. DOM telemetry allows our network engineers to read exact optical power levels via command-line interface without disrupting active links. The metal casing provides solid structural shielding against electromagnetic interference inside dense switch frames. A top-tier commercial-grade optic that meets every technical benchmark.

103 Helpful vote Comments

P***e

Ireland

Verified Purchase

5 .0

2026-04-29

Good 10G SFP+ CWDM optics for standard indoor rack deployments. Replaced aging optics in our aggregation layer and observed clean optical power budgets instantly. A practical choice for enterprise optical upgrades.

70 Helpful vote Comments

F***s

Romania

Verified Purchase

5 .0

2026-02-24

For indoor telecom cabinets and campus aggregation, this 10G 1570nm CWDM SFP+ module does what it should. The EML transmitter provides a clean 20km SMF connection, and the LC duplex interface makes replacements simple for field techs.

65 Helpful vote Comments

H***s

Denmark

Verified Purchase

5 .0

2026-01-18

This was part of a 10G fiber uplink refresh for a distributed manufacturing campus. We selected the 1570nm CWDM channel to avoid conflicts with the wavelengths already live on the MUX. Installation was straightforward: insert the SFP+ optical transceiver, connect LC/UPC single-mode jumpers, verify wavelength mapping, then review DOM power levels. The EML/PIN design held stable during our normal indoor operating conditions, and all tested links remained error-free. It is a practical 20km CWDM optic for network teams that need more capacity from an existing fiber plant. ^_^

131 Helpful vote Comments

C***n

Thailand

Verified Purchase

5 .0

2026-01-09

Perfect fit for our 1570nm CWDM channel — linked at 10G right away.

45 Helpful vote Comments

Q***e

Ukraine

Verified Purchase

5 .0

2025-12-30

Finding reliable 10G SFP+ 1570nm CWDM modules with accurate DOM functionality at this price point is tough. Optical power monitoring matches our handheld power meters closely. Makes remote diagnostic checks very straightforward during scheduled maintenance windows.

97 Helpful vote Comments

Z***n

Belgium

Verified Purchase

5 .0

2025-11-28

Used this 1570nm 10G CWDM transceiver to connect two office buildings over existing single-mode fiber. The link came up immediately, and the DOM values looked normal from day one. Nice option when you need to add bandwidth without pulling more fiber.

94 Helpful vote Comments

N***n

Lithuania

Verified Purchase

4 .0

2025-11-05

This CWDM module integrated smoothly with our single-mode fiber trunks and DOM values match our optical power meter readings. Shipping courier routing was a bit slow, but the product performance completely makes up for it.

32 Helpful vote Comments

E***r

Hungary

Verified Purchase

5 .0

2025-10-15

We used this CWDM-SFP10G-1570 equivalent for a phased data center migration. Instead of installing additional fiber between the main server room and the disaster-recovery site, we reused the existing SMF pair with CWDM wavelengths. The 20km reach was more than enough for our route, while the Duplex LC interface matched the patch panels already in service. The DOM/DDM function was particularly useful during commissioning because we could confirm receive power remotely before sending anyone to the far-end cabinet. Stable under sustained backup and virtualization traffic — no link flaps during our test window.

125 Helpful vote Comments

B***d

Poland

Verified Purchase

5 .0

2025-09-17

This 20km CWDM SFP+ module worked well on our 1570nm channel through a passive MUX/DEMUX. Duplex LC/UPC connectors matched our existing patch leads, so installation was fast. No drama, just a stable 10GbE link.

82 Helpful vote Comments

H***s

South Africa

Verified Purchase

5 .0

2025-08-31

1570nm optics synced up instantly across our distribution rings. Zero drops!

64 Helpful vote Comments

J***n

Finland

Verified Purchase

5 .0

2025-05-03

We use several wavelength channels across a business park, and this 1570nm CWDM module completed the set nicely. It is a commercial-temperature module, which is exactly what we needed for an indoor MDF rack. DOM monitoring helps our team catch dirty connectors before they become outages.

93 Helpful vote Comments

X***t

Cambodia

Verified Purchase

4 .0

2025-04-16

The 10G SFP+ CWDM transceiver modules themselves are fantastic and DOM diagnostics read perfectly fine in our CLI. However, customs clearance at the destination airport delayed delivery by two days.

24 Helpful vote Comments

L***n

New Zealand

Verified Purchase

5 .0

2025-04-07

Super smooth deployment for our campus fiber expansion. Crisp LC connections!

63 Helpful vote Comments

D***n

Israel

Verified Purchase

5 .0

2025-03-08

We deployed twelve LS-CW5710-20C 10G CWDM modules across a regional campus network using passive CWDM MUX/DEMUX hardware. Each link was provisioned on standard single-mode fiber, with the 1570nm wavelength assigned to building-to-core traffic. All modules negotiated at 10G, and DOM data was available consistently across the batch, including module temperature, supply voltage, laser bias, and optical TX/RX power. After burn-in and normal production traffic, we saw no packet loss or CRC increase. Great fit for an enterprise CWDM fiber expansion where spare strands are limited.

99 Helpful vote Comments

T***r

United States

Verified Purchase

5 .0

2024-11-15

Unbeatable price. Exactly as advertised.

79 Helpful vote Comments

J***g

Russian Federation

Verified Purchase

5 .0

2024-08-15

Will use your service if we have a need.

14 Helpful vote Comments

S***v

Malaysia

Verified Purchase

5 .0

2024-06-26

Great site with awesome prices and Fast shipping.Buy with confidence from Fiberstore.

43 Helpful vote Comments

S***s

Singapore

Verified Purchase

5 .0

2024-04-12

Very easy website to make online purchase.

88 Helpful vote Comments

M***n

Romania

Verified Purchase

5 .0

2024-03-25

The price was low but the quality was better than expected. They were an excellent value for my money. Highly recommend!

81 Helpful vote Comments

M***i

Ireland

Verified Purchase

5 .0

2024-02-10

Not the best pricing on the web, but they had the availability I needed and shipped quickly.

95 Helpful vote Comments

A***L

Cambodia

Verified Purchase

5 .0

2024-02-02

Excellent product full working with low price. Shipping was also Fast. I got a good buy.

24 Helpful vote Comments

A***v

Austria

Verified Purchase

5 .0

2024-01-12

Was contacted by their sales department, and product arrived quickly!

14 Helpful vote Comments

B***d

Canada

Verified Purchase

5 .0

2023-09-15

good quality and servies, LINK-PP.

51 Helpful vote Comments

D***y

Republic of Korea

Verified Purchase

5 .0

2023-07-03

Great variety and more items in stock than competitors.

46 Helpful vote Comments

C***n

Philippines

Verified Purchase

5 .0

2023-04-14

My experience with LINK-PP is the best. Everytime I need something this is the first place I search. It is so easy to do business with you and to find what I need without the hassle.

40 Helpful vote Comments

M***s

Hungary

Verified Purchase

5 .0

2023-02-28

I was kept well informed of the status of my order. It all arrived on the scheduled date and was in perfect condition. Can't wait to use it.

9 Helpful vote Comments

M***o

Hungary

Verified Purchase

5 .0