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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Generic CW-SFP10G40-59 Compatible LINK-PP 10G SFP+ CWDM 1590nm 40km Duplex LC DDM SMF Optical Transceiver Module

Name: Generic CW-SFP10G40-59 Compatible LINK-PP 10G SFP+ CWDM 1590nm 40km Duplex LC DDM SMF Optical Transceiver Module
Brand: LINK-PP
SKU: 221928
Price: 220.16 USD
Availability: InStock
Rating: 4.9 (26 reviews)

# 221928

Product: Generic CW-SFP10G40-59 Compatible LINK-PP 10G SFP+ CWDM 1590nm 40km Duplex LC DDM SMF Optical Transceiver Module
SKU: 221928
P/N: LS-CW5910-40C
Price: $ 256
Stock: 282 in Stock
Sold: 763
Product URL: https://www.l-p.com/products/495389.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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Generic CW-SFP10G40-59 Compatible LINK-PP 10G SFP+ Specifications

CW-SFP10G40-59 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.

Generic Part Number	CW-SFP10G40-59	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

K***s

United Kingdom

Verified Purchase

5 .0

2026-01-20

Bought these 10G 1590nm CWDM optical transceivers for a small regional network upgrade. The module reported temperature, voltage, TX power, and RX power through DOM, so our NOC team could verify the link without sending anyone onsite. That saved time during turn-up.

88 Helpful vote Comments

V***s

Philippines

Verified Purchase

4 .0

2026-01-03

The optical module worked well on our 36km SMF campus link and DOM data was available as expected. Shipping took a little longer than our original estimate, so order ahead if the install date is tight. Product performance itself was fine.

23 Helpful vote Comments

S***s

Germany

Verified Purchase

5 .0

2025-12-10

We used these LS-CW5910-40C CWDM modules to extend a 10G connection between two campus buildings. The route is just under 35km on existing SMF, and both ends trained quickly. The duplex LC connectors were clean and properly capped in the box.

73 Helpful vote Comments

I***d

Spain

Verified Purchase

5 .0

2025-11-11

We deployed 30 LS-CW5910-40C modules across a municipal campus network, using the 1590nm CWDM wavelength on existing single-mode fiber. Most spans were between 28km and 35km, with passive CWDM components in the path. All links came up at 10Gbps, and the DOM readings were especially useful for documenting baseline TX/RX levels after installation. Three weeks into production, there have been no link flaps or abnormal temperature alerts.

118 Helpful vote Comments

E***n

Thailand

Verified Purchase

4 .0

2025-08-29

We installed these CWDM modules in a conditioned remote cabinet and got a stable 10Gbps connection over single-mode fiber. The packaging could use more padding for international shipments, though every transceiver in our order worked.

31 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

M***s

Argentina

Verified Purchase

5 .0

2025-06-04

Plug and play into our CWDM mux without a single frame drop!

57 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***s

Japan

Verified Purchase

5 .0

2025-03-16

Clean optics, flawless DDM telemetry, super fast shipping!

55 Helpful vote Comments

M***n

United States

Verified Purchase

5 .0

2025-03-04

Order was easy, price was competitive and the shipping was Fast.

109 Helpful vote Comments

H***s

Singapore

Verified Purchase

5 .0

2025-03-02

During a data center consolidation project, we needed to carry 10GbE traffic between two facilities without consuming more fiber pairs. These LS-CW5910-40C modules allowed us to use the 1590nm channel in our CWDM system over a 40km-class duplex fiber route. DOM was not just a checkbox: we used the live optical measurements to identify a dirty connector on one circuit before cutover. The modules completed the migration cleanly and gave procurement a much better cost-per-link result than our previous source.

111 Helpful vote Comments

M***i

Philippines

Verified Purchase

5 .0

2024-12-07

We are very happy repeat customers. Great prices and Fast shipping.

48 Helpful vote Comments

Y***g

Norway

Verified Purchase

5 .0