Is this module compatible with traditional CWDM passive filter multiplexers?

No, this is a narrow-band 100GHz DWDM Channel 35 module. It requires a dedicated DWDM multiplexer grid to ensure proper channel isolation.

Can I use this module for a standard 10G link, or do I need specific DWDM equipment?

You need a DWDM Mux/Demux that supports the C35 channel (1549.32nm). Because it emits a highly specific wavelength, it cannot be paired with standard 1310nm or 850nm optics on the other end.

Is the physical dimension compliant with high-density switches where ports are stacked closely?

Yes, it is built exactly to standard SFF-8432 mechanical guidelines. It slides in and unlatches smoothly even in maximum-density line cards.

What is the exact channel and frequency for the C35 designation?

The C35 designation corresponds to ITU Grid Channel 35. It operates at a precise wavelength of 1549.32 nm with a frequency of 193.5 THz.

If my dark fiber span is exactly 38km, will this module still hold a stable 10G link?

It is possible if your fiber line has very low attenuation and clean splices. We highly recommend checking your total dB loss budget with an OTDR first.

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FS DWDM-SFP10G-40-I Compatible LINK-PP C35 10G SFP+ DWDM 1549.32nm 40km Duplex LC/UPC DDM SMF Optical Transceiver Module (Industrial)

Name: FS DWDM-SFP10G-40-I Compatible LINK-PP C35 10G SFP+ DWDM 1549.32nm 40km Duplex LC/UPC DDM SMF Optical Transceiver Module (Industrial)
Brand: LINK-PP
SKU: 222549
Price: 257.14 USD
Availability: InStock
Rating: 5 (43 reviews)

# 222549

Product: FS DWDM-SFP10G-40-I Compatible LINK-PP C35 10G SFP+ DWDM 1549.32nm 40km Duplex LC/UPC DDM SMF Optical Transceiver Module (Industrial)
SKU: 222549
P/N: LS-DW3510-40I
Price: $ 299
Stock: 494 in Stock
Sold: 646
Product URL: https://www.l-p.com/products/495005.htm

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Compatible:: Cisco; LINK-PP; Arista; Brocade; Ciena; Dell; Extreme; FS; Generic; H3C; HW; Juniper; MRV; Netgear

Wavelength:: C17; C18; C19; C20; C21; C22; C23; C24; C25; C26; C27; C28; C29; C30; C31; C32; C33; C34; C35; C36; C37; C38; C39; C40

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FS DWDM-SFP10G-40-I Compatible LINK-PP C35 10G SFP+ Specifications

DWDM-SFP10G-40-I, operating as a hot-pluggable 10G SFP+ DWDM optical transceiver module, bridges single-mode fiber (SMF) links up to 40km at a 1549.32nm wavelength while embedding a comprehensive suite for real-time Digital Diagnostic Monitoring.

FS Part Number	DWDM-SFP10G-40-I	Vendor Name	LINK-PP
Form Factor	SFP+	Max Data Rate	10.7Gbps
Wavelength	1549.32nm	Max Cable Distance	40km
Connector	Duplex LC	Media	SMF
Transmitter Type	EML	Receiver Type	PIN
TX Power	-1 to +2dBm	RX Power	-16 to -1dBm
Receiver Sensitivity	<-15.5dBm	DDM Support	Yes
Operating Temperature Range	-40 to 85°C	Protocols	SFP+ MSA Compliant, CPRI, eCPRI

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Q: Is this module compatible with traditional CWDM passive filter multiplexers? By D***d on 2026-04-10

A: No, this is a narrow-band 100GHz DWDM Channel 35 module. It requires a dedicated DWDM multiplexer grid to ensure proper channel isolation. By admin on 2026-04-11
Q: Can I use this module for a standard 10G link, or do I need specific DWDM equipment? By G***s on 2026-01-14

A: You need a DWDM Mux/Demux that supports the C35 channel (1549.32nm). Because it emits a highly specific wavelength, it cannot be paired with standard 1310nm or 850nm optics on the other end. By admin on 2026-01-15
Q: Is the physical dimension compliant with high-density switches where ports are stacked closely? By F***h on 2025-11-28

A: Yes, it is built exactly to standard SFF-8432 mechanical guidelines. It slides in and unlatches smoothly even in maximum-density line cards. By admin on 2025-11-29
Q: What is the exact channel and frequency for the C35 designation? By E***n on 2025-05-02

A: The C35 designation corresponds to ITU Grid Channel 35. It operates at a precise wavelength of 1549.32 nm with a frequency of 193.5 THz. By admin on 2025-05-03
Q: If my dark fiber span is exactly 38km, will this module still hold a stable 10G link? By H***m on 2025-04-26

A: It is possible if your fiber line has very low attenuation and clean splices. We highly recommend checking your total dB loss budget with an OTDR first. By admin on 2025-04-27

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N***n

United States

Verified Purchase

5 .0

2026-04-22

Swapped out some old 10G generic optics for these dedicated DWDM Ch35 transceivers to maximize our single-mode fiber infrastructure. The duplex LC connector has a nice tactile click. Power consumption is impressively low, keeping our line card power draw well within specs.

120 Helpful vote Comments

G***s

United States

Verified Purchase

5 .0

2026-03-03

Ordered a batch of these LS-DW3510-40I DWDM modules for a regional ISP cell tower backhaul project. The single-mode fiber run is roughly 33km. Hooked them up to our routers and they registered immediately without forcing any speed settings. DOM telemetry matches our bench test meters perfectly. Very satisfied!

108 Helpful vote Comments

L***l

United States

Verified Purchase

5 .0

2025-12-03

If you are looking for reliable industrial 10G SFP+ DWDM optical transceivers for harsh environments, this is it. Our node is located right next to heavy machinery with high ambient temps. These units stay cool around 52°C according to the internal DDM sensor. Outstanding thermal design!

54 Helpful vote Comments

C***n

United States

Verified Purchase

5 .0

2025-11-28

Flawless 10G link on our 30km campus run. Fully recognized by our EdgeSwitch instantly!

71 Helpful vote Comments

R***e

United States

Verified Purchase

5 .0

2025-11-19

Perfect for High-Density Passive DWDM MUX Deployments! As an architecture consultant, I am highly cautious about third-party DWDM channel grid alignment, but these 1549.32nm (Channel 35) SFP+ transceivers are incredibly stable. We populated 24 ports on a passive 100GHz MUX connected to our switches, and the optical spectrum analyzer showed zero center wavelength drift. The built-in DOM functionality is fully compliant with SFF-8472, feeding real-time bias current and voltage metrics seamlessly into our automated SNMP tracking software. For long-haul 40km single-mode fiber links, these modules offer premium performance without the premium brand tax.

86 Helpful vote Comments

I***l

United States

Verified Purchase

5 .0

2025-10-22

We needed specific channel 35 DWDM optics for an existing passive MUX setup. LINK-PP nailed it with this industrial-grade transceiver. The real-time Digital Diagnostics Monitoring (DDM) is fully operational, tracking optical Rx/Tx power levels accurately. Definitely adding them to our standard procurement vendor list.

114 Helpful vote Comments

P***s

United States

Verified Purchase

5 .0

2025-09-02

Best choice for high-density DWDM expansions. The 1549.32nm wavelength is perfectly centered with zero spectral drift. Our optical spectrum analyzers verified the tight tolerances. Will definitely buy more LINK-PP transceivers for our next project rollout.

33 Helpful vote Comments

U***y

United States

Verified Purchase

4 .0

2025-08-31

High-quality 40km DWDM module. The wavelength is perfectly centered and the 10Gbps line rate runs completely error-free. The price is unbeatable for an industrial-grade wide temperature module. The shipping tracking link was delayed by 48 hours, though the package arrived right on time anyway. Will buy again.

35 Helpful vote Comments

N***e

Cambodia

Verified Purchase

5 .0

2025-08-08

Ordering was quick with email notifications of shipping and tracking numbers. Price was very competitive.

65 Helpful vote Comments

F***k

United States

Verified Purchase

5 .0

2025-08-06

LC duplex ports click in snugly. Zero frame drops over a 35km test span.

65 Helpful vote Comments

O***y

United States

Verified Purchase

5 .0

2025-07-29

Running these inside a remote node cabinet on a mountain top. The industrial grade wide-temperature range was a mandatory requirement for our engineering team. They have survived extreme weather spikes already while maintaining a steady 10Gbps link. Simply amazing.

153 Helpful vote Comments

T***v

United States

Verified Purchase

5 .0

2025-07-18

Great site, easy to use.

106 Helpful vote Comments

h***i

South Africa

Verified Purchase

5 .0

2025-07-13

This is my go-to site for ordering high quality optics, especially customized ones. They always have the best prices and a great selection.

71 Helpful vote Comments

E***d

United States

Verified Purchase

5 .0

2025-07-01

Industrial grade pays off. Surviving the Texas summer heat inside an uncooled pole cabinet.

137 Helpful vote Comments

R***g

India

Verified Purchase

5 .0

2025-06-29

I am proud to e a customer of Fiberstore.

59 Helpful vote Comments

K***t

United States

Verified Purchase

5 .0

2025-06-13

Perfect fit for our data center migration project. Needed a stable DWDM 10G link over a rented dark fiber path. The LS-DW3510-40I gave us the exact link budget required to clear the inline losses from old patch fields. Highly recommend for enterprise networking teams.

81 Helpful vote Comments

M***r

Denmark

Verified Purchase

5 .0

2025-05-21

The website design was great! Will definitely order from them the next time I

32 Helpful vote Comments

T***n

United States

Verified Purchase

5 .0

2025-05-09

We deployed these dedicated 1549.32nm DWDM modules to connect our primary NVMe SAN cluster to an off-site backup storage array over a 28km single mode fiber run. Given the extreme IOPS and zero-latency requirements of our database replication scripts, we could not afford any packet drops or re-transmissions. These transceivers delivered pure, unthrottled 10Gbps line-rate throughput without a single CRC error since deployment. The DOM interface provides continuous monitoring of the optical signal integrity, ensuring our mission-critical data replication paths remain fully optimized and reliable.

132 Helpful vote Comments

P***d

Sweden

Verified Purchase

5 .0

2025-04-25

Fast Shipping, Product as described.

135 Helpful vote Comments

B***g

Turkey

Verified Purchase

5 .0

2025-04-07

Great website. Easy and organized.

68 Helpful vote Comments

R***p

Denmark

Verified Purchase

5 .0

2025-03-27

Wanted some stuff at reasonable price. Order immediately processed. Very pleased with price.

16 Helpful vote Comments

V***e

United States

Verified Purchase

4 .0

2025-03-21

The SFP+ 10G DWDM module handles our 30km single-mode fiber span with plenty of link margin to spare. DDM statistics are fully readable via standard SNMP. My only small complaint is that the bulk shipping carton didn't include extra replacement dust caps. If you lose one in the field, you're out of luck.

28 Helpful vote Comments

D***s

Belarus

Verified Purchase

5 .0

2025-03-12

Product was shipped promptly and the product was just as it was described.

43 Helpful vote Comments

M***y

United States

Verified Purchase

5 .0

2025-03-07

Our team deployed these 1549.32nm SFP+ modules across a metro ring topology. Having precise DOM functionality helps our NOC team monitor signal degradation proactively. LINK-PP has proved that you don't need to pay premium brand tax for carrier-grade reliability.

87 Helpful vote Comments

W***y

United States

Verified Purchase

5 .0

2024-12-12

I received a timely reply about the product I needed and ordering it was easy.

40 Helpful vote Comments

K***v

United States

Verified Purchase

5 .0

2024-04-08

I have been using Link-pp for years, they are awesome.

36 Helpful vote Comments

W***g

United States

Verified Purchase

5 .0

2023-12-13

Great customer service!

92 Helpful vote Comments

H***s

Taiwan, Province of China

Verified Purchase

5 .0

2023-11-19

Fast transaction, Fast shipping and good price!

77 Helpful vote Comments

O***g

Netherlands

Verified Purchase

5 .0

2023-11-10

Awesome experience... Great customer service. It's was perfect experience.

83 Helpful vote Comments

M***z

France

Verified Purchase

5 .0

2023-11-08

Ordering was quick with email notifications of shipping and tracking numbers. Price was very competitive on the 10G Sfp Cage I ordered. Everything was good. Will definitely use this company again.

100 Helpful vote Comments

T***i

Ireland

Verified Purchase

5 .0

2023-09-23

Received informative status emails for order confirmation and shipping notification. Items were shipped/received promptly and were as described. Overall, an easy shopping experience and I will certainly shop here again.

66 Helpful vote Comments

P***I

United States

Verified Purchase

5 .0

2023-08-16

Higher shipping charge fee. No other complaints.

38 Helpful vote Comments

B***u

United States

Verified Purchase

5 .0

2023-06-04

Just as we wanted, the item was delivered in a timely manner. Thanks

85 Helpful vote Comments

M***s

France

Verified Purchase

5 .0

2023-05-24

It is always a pleasure to purchase from l-p.com. Their website is easy and friendly to use and the products have great descriptions and always accurately show. Customer service is the best I've experienced..

99 Helpful vote Comments

A***a

United Kingdom

Verified Purchase

5 .0

2023-05-04

no problems to report

165 Helpful vote Comments

D***e

Mexico

Verified Purchase

5 .0