Does this transceiver support link pass-through testing if our patch panels have multiple intermediate fusion splices over a 15km span?

Yes, as long as your total link insertion loss stays within the module’s optical power budget, it will maintain a stable 10Gbps link.

Does the 1370nm receiver wavelength exhibit higher vulnerability to micro-dust attenuation on the duplex LC interface compared to standard 1310nm single-mode optics transceiver?

At the physical layer, both wavelengths share an identical 9µm single-mode fiber core diameter, making their insertion loss sensitivity to microscopic contamination functionally equal. To maintain your link budget margins, we strictly recommend scoping and cleaning the ferrule tips with an optical click-cleaner immediately prior to insertion.

Does this transceiver support single-strand BiDi fiber infrastructure, or does it require two dedicated fibers?

This model requires a standard Duplex LC connection, meaning it utilizes two separate single-mode fiber strands (one for transmitting at 1370nm and one for receiving).

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FS CWDM-SFP10G-20S Compatible LINK-PP 10G SFP+ CWDM 1370nm 20km Duplex LC DDM SMF Optical Transceiver Module

Name: FS CWDM-SFP10G-20S Compatible LINK-PP 10G SFP+ CWDM 1370nm 20km Duplex LC DDM SMF Optical Transceiver Module
Brand: LINK-PP
SKU: 221887
Price: 202.96 USD
Availability: InStock
Rating: 4.8 (13 reviews)

# 221887

Product: FS CWDM-SFP10G-20S Compatible LINK-PP 10G SFP+ CWDM 1370nm 20km Duplex LC DDM SMF Optical Transceiver Module
SKU: 221887
P/N: LS-CW3710-20C
Price: $ 236
Stock: 97 in Stock
Sold: 1.4K
Product URL: https://www.l-p.com/products/494554.htm

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Manufacture: LINK-PP

P/N: LS-CW3710-20C

Compatible:: Cisco; LINK-PP; Brocade; Ciena; Dell; FS; Generic; H3C; HPE; 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-20S Compatible LINK-PP 10G SFP+ Specifications

The CWDM-SFP10G-20S anchors high-speed 10G optical networks as a hot-pluggable CWDM SFP+ transceiver, transmitting up to 20km over single-mode fiber (SMF) via LC duplex connectors at a 1370nm wavelength. Operating on a single +3.3V power supply, this module integrates digital diagnostic monitoring (DDM) to deliver continuous real-time system performance insights.

FS Part Number	CWDM-SFP10G-20S	Vendor Name	LINK-PP
Form Factor	SFP+	Max Data Rate	10.7Gbps
Wavelength	1370nm	Max Cable Distance	20km
Connector	Duplex LC	Media	SMF
Transmitter Type	DFB	Receiver Type	PIN
TX Power	-5 to +2dBm	RX Power	-16 to -1dBm
Receiver Sensitivity	<-15.5dBm	Receiver Overload	0.5dBm
Operating Temperature Range	0 to 70°C	Protocols	SFP+ MSA Compliant, CPRI, eCPRI, ITU-T G.652

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LS-CWxx10-20C 1270-1450.pdf

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Q: Does this transceiver support link pass-through testing if our patch panels have multiple intermediate fusion splices over a 15km span? By F***e on 2026-02-10

A: Yes, as long as your total link insertion loss stays within the module’s optical power budget, it will maintain a stable 10Gbps link. By admin on 2026-02-11
Q: Does the 1370nm receiver wavelength exhibit higher vulnerability to micro-dust attenuation on the duplex LC interface compared to standard 1310nm single-mode optics transceiver? By G***n on 2025-06-21

A: At the physical layer, both wavelengths share an identical 9µm single-mode fiber core diameter, making their insertion loss sensitivity to microscopic contamination functionally equal. To maintain your link budget margins, we strictly recommend scoping and cleaning the ferrule tips with an optical click-cleaner immediately prior to insertion. By admin on 2025-06-22
Q: Does this transceiver support single-strand BiDi fiber infrastructure, or does it require two dedicated fibers? By E***e on 2025-05-11

A: This model requires a standard Duplex LC connection, meaning it utilizes two separate single-mode fiber strands (one for transmitting at 1370nm and one for receiving). By admin on 2025-05-12

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K***n

Poland

Verified Purchase

5 .0

2026-04-22

Flawless performance in indoor server racks. Installed these 1370nm 20km modules in a climate-controlled server room. They operate perfectly within the 0 to 70°C commercial temperature profile. Zero heat-related performance degradation noticed.

106 Helpful vote Comments

T***e

Nepal

Verified Purchase

5 .0

2026-04-13

High-performance storage replication over 18km single-mode fiber. We migrated our disaster recovery site to a new facility exactly 18km away from our primary data center. We utilized these 10G CWDM 1370nm transceivers to link our primary SAN to the backup replication target. Despite pushing close to the 20km maximum rating on a standard single-mode fiber path, we have experienced absolutely zero frame errors, sync drops, or link flapping. The data throughput is a steady, unthrottled 10Gbps. Couldn't have asked for a better, more cost-effective replication link setup.

166 Helpful vote Comments

B***r

Spain

Verified Purchase

5 .0

2026-04-08

Best budget-friendly 10G CWDM SFP+ 20km transceivers on the market right now, hands down.

59 Helpful vote Comments

Z***r

Thailand

Verified Purchase

5 .0

2026-03-03

Solid 10G SFP+ optic. Recognized instantly by our core switch. (^_^)

20 Helpful vote Comments

R***y

Libyan Arab Jamahiriya

Verified Purchase

5 .0

2026-02-03

Perfect solution for expanding fiber capacity in municipal networks. Our municipal WAN was running out of dark fiber pairs between the city hall and the public safety building. Instead of embarking on a costly trenching project, we deployed a passive CWDM system utilizing these 10Gbps 1370nm SFP+ optics. The 20km range provided a massive optical budget safety margin over our 14km actual run distance. The transceivers fit perfectly into our standard SFP+ ports and deliver immediate full-duplex throughput.

89 Helpful vote Comments

V***n

Maldives

Verified Purchase

4 .0

2026-01-22

Great transceivers, but shipping took an extra day. The LS-CW3710-20C 10G modules themselves work perfectly in our switches — recognized immediately and DDM is fully functional. However, the express courier delayed the delivery by 24 hours, which pushed our scheduled maintenance window back slightly. Product is 5 stars, shipping is 3 stars.

15 Helpful vote Comments

M***y

Belarus

Verified Purchase

5 .0

2026-01-18

Great value 10G optical module. If you are searching for reliable 10G 1370nm CWDM transceivers that won't break the enterprise budget, the LS-CW3710-20C is a phenomenal option. Will definitely buy more for our upcoming phase 2 expansion.

36 Helpful vote Comments

N***d

Israel

Verified Purchase

5 .0

2025-12-11

Seamless 10Gbps throughput. Running heavy backup syncs between two local data centers over a 15km single-mode fiber path. These transceivers handle full line-rate traffic with ease. Latency is absolutely minimal.

58 Helpful vote Comments

W***y

Philippines

Verified Purchase

4 .0

2025-11-27

Slightly delayed tracking info update. The sales team was helpful, but the tracking number didn't update in the system until two days after shipment. Had me worried our network upgrade timeline would slip. Thankfully, the package arrived right on schedule and the 10G SFP+ CWDM modules are working beautifully.

24 Helpful vote Comments

A***d

United Kingdom

Verified Purchase

5 .0

2025-11-15

Perfect for our campus fiber network. 20km range gives us plenty of optical budget headroom!

43 Helpful vote Comments

J***n

Norway

Verified Purchase

5 .0

2025-10-09

Solid build quality. You can feel the quality just by handling the transceiver casing. The pull-tab mechanism is sturdy and doesn't feel like it's going to snap when pulling modules from dense patch panels. Double thumbs up! d(^o^)b

41 Helpful vote Comments

P***n

Cambodia

Verified Purchase

5 .0

2025-09-02

Excellent choice for campus network core distribution upgrade. Our university network team recently overhauled the distribution layer across 4 separate campus locations. We leveraged these 10G SFP+ CWDM 1370nm transceivers to consolidate traffic into our primary data center over a 15km single-mode fiber ring. The duplex LC interface provides clean, low-insertion-loss connectivity. Even with multiple intermediate optical patch panels, the signal margin remains highly conservative. This deployment has significantly reduced our packet jitter during peak student registration hours. Highly recommended for any institutional IT infrastructure overhaul.

145 Helpful vote Comments

G***l

Indonesia

Verified Purchase

5 .0

2025-04-26

Great addition to our ISP cell backhaul testing rig. We needed a reliable 1370nm CWDM SFP+ module to test channel segregation in the lab. The DOM functionality is fully operational, making it super easy to monitor signal degradation over simulated long runs.

95 Helpful vote Comments