How can we track the real-time temperature of the optics inside our remote server rooms to prevent overheating?

This module features built-in real-time Digital Diagnostic Monitoring (DDM). Your switch software can read the operating temperature, laser bias current, and optical power levels in real time.

We are building an 8-channel CWDM ring. Can this module be used as the 1590nm channel?

Yes. The LS-CW5910-40C module is designed for the 1590nm CWDM channel and can be used with a compatible CWDM Mux/Demux. Both ends of the same optical path must use 1590nm modules, while the Mux/Demux must include a matching 1590nm port.

Can we use this module in a standard duplex LC patch panel already installed in our campus network?

Yes, the LS-CW5910-40C module uses a duplex LC receptacle. It requires duplex single-mode fiber, not multimode fiber.

Our indoor server room is climate-controlled around 25°C, but summer heatwaves sometimes push cabinet temps to 55°C. Is this commercial module safe to use?

Yes, this commercial-grade LS-CW5910-40C module operates safely up to 70°C ambient case temperature, making it well-suited for indoor server rooms with minor temperature fluctuations.

We currently have a CWDM Mux/Demux setup running other wavelengths. Can we add this 1590nm module to expand our existing fiber capacity without replacing the passive Mux?

Absolutely. That’s the beauty of CWDM architecture. As long as your existing CWDM Mux/Demux filter has an open 1590nm channel port, you can simply plug this module in to add another 10G link over your current fiber pair — no network overhaul required.

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H3C CWDM-SFP10G-1590-40 Compatible LINK-PP 10G SFP+ CWDM 1590nm 40km Duplex LC DDM SMF Optical Transceiver Module

Name: H3C CWDM-SFP10G-1590-40 Compatible LINK-PP 10G SFP+ CWDM 1590nm 40km Duplex LC DDM SMF Optical Transceiver Module
Brand: LINK-PP
SKU: 221929
Price: 220.16 USD
Availability: InStock
Rating: 4.9 (27 reviews)

# 221929

Product: H3C CWDM-SFP10G-1590-40 Compatible LINK-PP 10G SFP+ CWDM 1590nm 40km Duplex LC DDM SMF Optical Transceiver Module
SKU: 221929
P/N: LS-CW5910-40C
Price: $ 256
Stock: 271 in Stock
Sold: 945
Product URL: https://www.l-p.com/products/484400.htm

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Manufacture: LINK-PP

P/N: LS-CW5910-40C

Compatible:: Cisco; LINK-PP; Alcatel-Lucent; 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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H3C CWDM-SFP10G-1590-40 Compatible LINK-PP 10G SFP+ Specifications

CWDM-SFP10G-1590-40 serves as a 10G CWDM SFP+ optical module that pairs a precision 1590nm cooled EML transmitter with a high-sensitivity PIN receiver to deliver reliable duplex LC connections up to 40km over single-mode fiber, complemented by continuous digital diagnostic monitoring for deep visibility into real-time optical link telemetry.

H3C Part Number	CWDM-SFP10G-1590-40	Vendor Name	LINK-PP
Form Factor	SFP+	Max Data Rate	10.7Gbps
Wavelength	1590nm	Max Cable Distance	40km
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, SFF 8472,SFF 8431,802.3ae, ITU-T

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Q: How can we track the real-time temperature of the optics inside our remote server rooms to prevent overheating? By L***y on 2026-03-27

A: This module features built-in real-time Digital Diagnostic Monitoring (DDM). Your switch software can read the operating temperature, laser bias current, and optical power levels in real time. By admin on 2026-03-28
Q: We are building an 8-channel CWDM ring. Can this module be used as the 1590nm channel? By J***y on 2026-02-05

A: Yes. The LS-CW5910-40C module is designed for the 1590nm CWDM channel and can be used with a compatible CWDM Mux/Demux. Both ends of the same optical path must use 1590nm modules, while the Mux/Demux must include a matching 1590nm port. By admin on 2026-02-06
Q: Can we use this module in a standard duplex LC patch panel already installed in our campus network? By I***s on 2025-12-18

A: Yes, the LS-CW5910-40C module uses a duplex LC receptacle. It requires duplex single-mode fiber, not multimode fiber. By admin on 2025-12-19
Q: Our indoor server room is climate-controlled around 25°C, but summer heatwaves sometimes push cabinet temps to 55°C. Is this commercial module safe to use? By K***n on 2025-06-02

A: Yes, this commercial-grade LS-CW5910-40C module operates safely up to 70°C ambient case temperature, making it well-suited for indoor server rooms with minor temperature fluctuations. By admin on 2025-06-03
Q: We currently have a CWDM Mux/Demux setup running other wavelengths. Can we add this 1590nm module to expand our existing fiber capacity without replacing the passive Mux? By M***n on 2025-05-24

A: Absolutely. That’s the beauty of CWDM architecture. As long as your existing CWDM Mux/Demux filter has an open 1590nm channel port, you can simply plug this module in to add another 10G link over your current fiber pair — no network overhaul required. By admin on 2025-05-25

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G***t

Norway

Verified Purchase

5 .0

2026-04-23

We selected the 1590nm 40km CWDM SFP+ optic because our wavelength plan required channel separation. The modules were installed in a mixed-hardware environment after compatibility selection and passed traffic tests with no errors. The specified commercial operating range is appropriate for our indoor racks, while the DFB CWDM optical design delivered the long reach we needed on SMF. This is now our standard spare for similar 10GbE CWDM routes.

95 Helpful vote Comments

N***s

Mexico

Verified Purchase

5 .0

2026-03-11

Needed a dedicated 1590nm optical transceiver module to clear an overloaded fiber conduit using CWDM multiplexing. Link span is roughly 34 km on SMF duplex LC cabling, and optical loss margins remain pristine. Excellent alternative for long-haul enterprise routing.

72 Helpful vote Comments

E***w

Sweden

Verified Purchase

5 .0

2026-02-27

Connected these duplex LC SFP+ optics to our 18-channel passive CWDM Mux/Demux tray. Clean 1590nm center wavelength with zero cross-talk or adjacent channel interference detected.

58 Helpful vote Comments

L***l

Iran, Islamic Republic of

Verified Purchase

5 .0

2026-02-19

Good optical power margin and a solid duplex LC fit. Exactly what we needed.

67 Helpful vote Comments

E***s

Malaysia

Verified Purchase

4 .0

2026-02-10

Good packaging overall, with dust caps and individual protective cases included. The tracking update was a little slow at first, but the parcel arrived safely.

24 Helpful vote Comments

J***x

Russian Federation

Verified Purchase

5 .0

2025-12-01

We used these 1590nm CWDM SFP+ modules in a long-distance enterprise backbone pilot that included several patch panels and a passive CWDM MUX/DEMUX layer. After checking our fiber loss and cleaning a few connectors, the 10G link stayed stable throughout load testing. The DOM readings were also useful for keeping an eye on optical levels in our monitoring system. Just make sure your wavelength plan and host compatibility are correct before installation—once we had those covered, the modules worked exactly as expected.

132 Helpful vote Comments

M***r

United Arab Emirates

Verified Purchase

5 .0

2025-11-21

Excellent 1590nm CWDM SFP+ optical module for 40km single-mode fiber links.

43 Helpful vote Comments

R***y

Brazil

Verified Purchase

5 .0

2025-10-09

We deployed these for a base-station backhaul lab where 10G Ethernet transport and optical diagnostics were both important. The DOM values gave the engineers immediate visibility during fiber acceptance testing. Great for this kind of staged rollout.

99 Helpful vote Comments

P***s

France

Verified Purchase

5 .0

2025-08-17

This was a practical option for our 40km single-mode fiber requirement. We needed the 1590nm CWDM channel to match the passive CWDM plan already installed, and the wavelength alignment was right for the project. No interoperability surprises so far.

81 Helpful vote Comments

J***k

India

Verified Purchase

5 .0

2025-07-27

Deployed a dozen of these LS-CW5910-40C 10G SFP+ modules across our campus ring to aggregate 10G traffic over single-mode fiber. Linked right up to our passives at 1590nm with tight optical output power tolerances. DDM reporting through our NMS shows stable Tx/Rx levels well within standard margins.

114 Helpful vote Comments

P***s

Italy

Verified Purchase

5 .0

2025-06-16

Our operations team ran an acceptance test before putting these 10G SFP+ CWDM transceivers into service for a remote site. We checked module recognition, link stability, DOM telemetry, fiber polarity, and receive-power consistency through the full patch-panel path. The duplex LC interfaces seated securely, and the reported diagnostics made it easy to compare both ends of every circuit. For commercial indoor network rooms and conditioned edge cabinets, this module has been a reliable fit.

134 Helpful vote Comments

A***t

Canada

Verified Purchase

5 .0

2025-05-30

Installed 50 units for a remote office aggregation link over duplex SMF. The 10G SFP+ CWDM optical transceivers have been running continuously, and DOM gives us a simple way to watch receive levels. Very helpful for preventive maintenance.

96 Helpful vote Comments

A***n

South Africa

Verified Purchase

4 .0

2025-05-17

These modules arrived in good condition and were individually protected. Delivery took a couple of extra days, but the order was complete and well packed.

26 Helpful vote Comments

A***l

Bangladesh

Verified Purchase

5 .0

2025-04-12

Used this 40km SFP+ CWDM module for a campus uplink — zero drama.

49 Helpful vote Comments

R***e

France

Verified Purchase

5 .0