What happens to the transmission distance if our outdoor fiber path has multiple mechanical splices and patch panels?

Every splice introduces attenuation, which reduces the effective maximum reach. We advise calculating your total optical link budget to ensure it falls within the module's 20km power margin.

We are multiplexing this onto an existing 8-channel CWDM Mux. Is the 1290nm center wavelength tight enough to prevent bleed-over into the adjacent 1310nm channel?

Yes, it features a highly precise DFB laser with a strict ±6.5nm channel bandwidth tolerance, ensuring zero cross-talk or spectral overlap with neighboring 1270nm or 1310nm channels.

Will this 1290nm SFP module interoperate with a 1310nm standard LR transceiver over a 10km dark fiber span?

No, CWDM channels are wavelength-specific; this module must pair with another 1290nm optic or terminate into a matching CWDM Mux port.

Does the integrated DDM register internal module voltage fluctuations caused by power surges in older network closets?

Yes, the Digital Diagnostic Monitoring telemetry continuously tracks real-time supply voltage, allowing your management software to spot power anomalies.

Breadcrumb: Home; Products; Optics Transceivers | SFP Modules; 10/25/40G/100G Transceiver Modules; 10G CWDM/DWDM SFP+; 221906

Click to open expanded view

Generic CWDM-SFP10G-20SP Compatible LINK-PP 10G SFP+ CWDM 1290nm 20km Duplex LC DDM SMF Optical Transceiver Module

Name: Generic CWDM-SFP10G-20SP Compatible LINK-PP 10G SFP+ CWDM 1290nm 20km Duplex LC DDM SMF Optical Transceiver Module
Brand: LINK-PP
SKU: 221906
Price: 116.96 USD
Availability: InStock
Rating: 4.9 (14 reviews)

# 221906

Product: Generic CWDM-SFP10G-20SP Compatible LINK-PP 10G SFP+ CWDM 1290nm 20km Duplex LC DDM SMF Optical Transceiver Module
SKU: 221906
P/N: LS-CW2910-20C
Price: $ 136
Stock: 57 in Stock
Sold: 1.1K
Product URL: https://www.l-p.com/products/494621.htm

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

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

For Order Over $5000 Get $100.00 Off , Code: Linkpp100

New Users: $10 Coupon for Orders , Code: linkpp2610

14 Reviews

4 Questions

Request Stock

1.1K Sold

$ 136

Free shipping over $600, If you need a more favorable price, please contact us directly.

Qty (pcs) :

Unit Price :

$ 136

100

$ 129.2

1000

$ 125.12

3000

$ 121.04

6000

$ 116.96

Manufacture: LINK-PP

P/N: LS-CW2910-20C

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

Shipping:

To Be Negotiated

Free Shipping

Can't deliver

to United States via {{now_chooseship?now_chooseship.name:''}}

Estimated delivery time : {{now_chooseship?now_chooseship.datemin:''}}-{{now_chooseship?now_chooseship.datemax:''}} days. See details

5-Year Warranty 30-Day Returns 30-Day Exchange

Stock:

{{parseInt(detail_data.left_num) ? detail_data.left_num +' in Stock' :detail_data.zeroStockOrder==0?'Out of Stock':'Available'}} .

Quantity:

( Min. Order {{detail_data.prodInfo.minimum_ordered_quantity}} )

undeliverable

Total Price:

{{ detail_data.displayed_price.unit_prefix }} {{ detail_data.displayed_price.original_total_price }} ( {{ detail_data.displayed_price.rate_of_discount }}% OFF ) {{detail_data.displayed_price.ex_sell_type}}

Add to wish

Specifications

Specification
Videos
Matching Products
Download
Q&A
Customer Reviews

Generic CWDM-SFP10G-20SP Compatible LINK-PP 10G SFP+ Specifications

CWDM-SFP10G-20SP standardizes 20km single-mode fiber links utilizing a 1290nm CWDM architecture, blending a hot-swappable 10G SFP+ form factor with advanced DFB/PIN optical components and real-time DDM diagnostics. Engineered for high-density networking, this transceiver delivers low-latency 10Gbps data transmission, full LC duplex connectivity, and reliable SFF-8472 compliance for seamless operational monitoring in enterprise and telecom infrastructures.

Generic Part Number	CWDM-SFP10G-20SP	Vendor Name	LINK-PP
Form Factor	SFP+	Max Data Rate	10.7Gbps
Wavelength	1290nm	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	DDM Support	Yes
Operating Temperature Range	0 to 70°C	Protocols	SFP+ MSA Compliant, CPRI, eCPRI, ITU-T G.652

Videos

Matching Products

Pictures

ID#

Description

Price

Stock

Add to Cart

Download

Product Drawing

PDF
LS-CWxx10-20C 1270-1450.pdf

Questions & Answers
Ask a Question

No data

Q: What happens to the transmission distance if our outdoor fiber path has multiple mechanical splices and patch panels? By P***e on 2026-04-04

A: Every splice introduces attenuation, which reduces the effective maximum reach. We advise calculating your total optical link budget to ensure it falls within the module's 20km power margin. By admin on 2026-04-05
Q: We are multiplexing this onto an existing 8-channel CWDM Mux. Is the 1290nm center wavelength tight enough to prevent bleed-over into the adjacent 1310nm channel? By N***t on 2026-03-21

A: Yes, it features a highly precise DFB laser with a strict ±6.5nm channel bandwidth tolerance, ensuring zero cross-talk or spectral overlap with neighboring 1270nm or 1310nm channels. By admin on 2026-03-22
Q: Will this 1290nm SFP module interoperate with a 1310nm standard LR transceiver over a 10km dark fiber span? By O***r on 2025-08-03

A: No, CWDM channels are wavelength-specific; this module must pair with another 1290nm optic or terminate into a matching CWDM Mux port. By admin on 2025-08-04
Q: Does the integrated DDM register internal module voltage fluctuations caused by power surges in older network closets? By M***k on 2025-05-29

A: Yes, the Digital Diagnostic Monitoring telemetry continuously tracks real-time supply voltage, allowing your management software to spot power anomalies. By admin on 2025-05-30

Customer Reviews
Write a Review

{{stardata.star}}

{{comment.count}} reviews
5 Stars

{{comment.star5}}%

4 Stars

{{comment.star4}}%

3 Stars

{{comment.star3}}%

2 Stars

{{comment.star2}}%

1 Star

{{comment.star1}}%

All Reviews ({{comment.star_num?comment.star_num:comment.count}})

All Reviews

5 stars only

4 stars only

3 stars only

2 stars only

1 star only
Reviews with Pictures ( {{comment.pic_comment}} )
See All Reviews

No data

Q***s

United Kingdom

Verified Purchase

5 .0

2026-04-25

No complaints here. Standard indoor server room environment, running cool at around 35°C according to the internal DDM sensor. Clean engineering.

110 Helpful vote Comments

H***p

Russian Federation

Verified Purchase

5 .0

2026-04-05

Rock solid 1290nm optics. Best price-to-performance ratio for CWDM links on the market right now.

28 Helpful vote Comments

O***d

Ukraine

Verified Purchase

5 .0

2026-03-31

Perfect fit for local ISP distribution. Used these 1290nm 20km modules to tap into an existing CWDM mux. Clean signals all around. Highly recommend for regional network upgrades.

38 Helpful vote Comments

W***t

Indonesia

Verified Purchase

5 .0

2026-03-19

Upgrading our campus Wi-Fi to high-density APs required a complete overhaul of our distribution layer backhaul. We ran these 1290nm 20km SFP transceivers from our central server room out to the edge closets. Even with multiple patch panels along the SMF run, the optical receiver sensitivity holds steady with no bit error rate (BER) spikes. Having operational DDM/DOM metrics exposed via our monitoring dashboard gives our net-ops team total peace of mind.

82 Helpful vote Comments

S***l

Sweden

Verified Purchase

5 .0

2026-02-12

Accurate specs. The 20km range limit is well-engineered; our optical time-domain reflectometer (OTDR) shows excellent margin at 14km.

70 Helpful vote Comments

J***t

Brazil

Verified Purchase

5 .0

2026-02-07

No-brainer for 1290nm CWDM setups. Will definitely source more for our next fiber ring expansion.

76 Helpful vote Comments

U***e

India

Verified Purchase

5 .0

2026-01-02

Decent packaging and fast delivery. Transceivers came individually static-shielded with dust caps on. Quick deployment for our weekend maintenance window.

47 Helpful vote Comments

R***m

Spain

Verified Purchase

5 .0

2025-10-13

Great addition to our 10G infrastructure. Hooked up our core routing matrix over a duplex SMF line. Immediate link aggregation success.

35 Helpful vote Comments

X***e

Austria

Verified Purchase

5 .0

2025-09-11

Deployed these across a metro Ethernet topology for a local utility network. The transceivers are highly compliant with IEEE 802.3 standards. We monitored the optical eye diagram during validation, and the cross-talk suppression on the 1290nm wavelength is exceptionally clean, especially considering adjacent channels are highly populated. Having accurate DOM diagnostics allows our field engineers to troubleshoot fiber attenuation problems without rolling out specialized test equipment every time.

148 Helpful vote Comments

N***e

Romania

Verified Purchase

5 .0

2025-08-12

Smooth 10G upgrade. Replaced some aging 1G optics with these duplex LC transceivers. The bandwidth leap for our backup storage network was night and day. Cheers to the engineering team for building a solid product!

93 Helpful vote Comments

T***e

Hong Kong

Verified Purchase

5 .0

2025-06-19

Solid option for localized 10G transport. Used these specifically for a short municipal fiber link. No alignment issues, clean TX power output.

151 Helpful vote Comments

L***e

Italy

Verified Purchase

5 .0

2025-05-29

Exactly as described. 20km link running stable for 2 weeks straight now.

118 Helpful vote Comments

P***e

Thailand

Verified Purchase

5 .0

2025-04-18

Consistent 10Gbps throughput. Tested across a 12km SMF run under full load. Latency is minimal and the power budget leaves plenty of headroom. Safe bet for any network admin.

27 Helpful vote Comments

Y***y

United Kingdom

Verified Purchase

4 .0

2025-04-11

The LS-CW2910-20C modules perform excellently, and the DDM readings match our hardware precisely. The package took two days longer than expected to clear local customs in the UK, but the product itself is top-tier.

15 Helpful vote Comments