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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Juniper EX-SFP-10GE-CWE59 Compatible LINK-PP 10G SFP+ CWDM 1590nm 40km Duplex LC DDM SMF Optical Transceiver Module

Name: Juniper EX-SFP-10GE-CWE59 Compatible LINK-PP 10G SFP+ CWDM 1590nm 40km Duplex LC DDM SMF Optical Transceiver Module
Brand: LINK-PP
SKU: 221931
Price: 220.16 USD
Availability: InStock
Rating: 4.9 (27 reviews)

# 221931

Product: Juniper EX-SFP-10GE-CWE59 Compatible LINK-PP 10G SFP+ CWDM 1590nm 40km Duplex LC DDM SMF Optical Transceiver Module
SKU: 221931
P/N: LS-CW5910-40C
Price: $ 256
Stock: 221 in Stock
Sold: 754
Product URL: https://www.l-p.com/products/484397.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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Juniper EX-SFP-10GE-CWE59 Compatible LINK-PP 10G SFP+ Specifications

EX-SFP-10GE-CWE59 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.

Juniper Part Number	EX-SFP-10GE-CWE59	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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A***s

Australia

Verified Purchase

5 .0

2026-05-20

Ordered the LS-CW5910-40C 1590nm CWDM module alongside other channel wavelengths to populate a new optical passive multiplexer. The duplex LC connector latches firmly and optical transmit power is extremely stable.

75 Helpful vote Comments

D***r

United States

Verified Purchase

5 .0

2026-04-18

Spot-on optical budget for our inter-building fiber expansion.

40 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

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

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

A***n

Republic of Korea

Verified Purchase

5 .0

2025-09-19

Running 8 channels on a passive CWDM grid. This 1590nm CWDM SFP+ module handles line-rate 10Gbps throughput cleanly without rising attenuation or thermal spikes inside our server rack switches. Will definitely reorder for upcoming nodes.

100 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***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***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

R***e

France

Verified Purchase

5 .0

2025-01-07

Very friendly and customber satisfaction. Couldn't be happier with the service.

43 Helpful vote Comments

R***g

Japan

Verified Purchase

5 .0

2024-12-23

Works perfectly and the price was more affordable than other brands.

65 Helpful vote Comments

G***e

Philippines

Verified Purchase

5 .0

2024-11-18

Item found quickly and in stock, great!

37 Helpful vote Comments

D***s

Norway

Verified Purchase

5 .0

2024-08-03

The more times use Link-pp, the more I like the company!

68 Helpful vote Comments

R***n

Cocos (Keeling) Islands

Verified Purchase

5 .0

2024-06-27

The whole system works very smoothly. Their modules are always solid. There is no problem with data transfer. Yoeng is very supportive and she quite understands my needs...

42 Helpful vote Comments

M***r

Romania

Verified Purchase

5 .0

2024-06-13

product, good price, the tech , customer service very profession

111 Helpful vote Comments

M***o

Italy

Verified Purchase

5 .0