We already have 1470nm, 1510nm, 1530nm, and 1570nm channels running on our passive CWDM Mux/Demux. Can we plug this 1550nm module straight into the open channel slot?

Yes, absolutely. 1550nm is a standard channel on the ITU-T G.694.2 CWDM grid with a 20nm channel spacing. As long as your Mux/Demux filter unit has a dedicated 1550nm port available (and you match it with a 1550nm CWDM transceiver at the remote end), the LS-CW5510-40C will integrate seamlessly without causing crosstalk or interfering with your existing wavelengths.

We have existing OS2 single-mode fiber and duplex LC patch cords. Is this module compatible with our cabling?

Yes. This module is designed for single-mode fiber transmission and uses a duplex LC optical interface. OS2 fiber is commonly used for long-distance 10G CWDM links and is suitable for this 40 km module.

Is the 0–70°C rating the ambient temperature or the module case temperature?

The stated specification is the operating case temperature of the module. Since internal switch heat and airflow can make the module case warmer than the surrounding air, it is important to leave sufficient thermal margin in high-density equipment.

Our fiber route is 32km, with several splices and patch panels. Is the 40km distance enough?

The 40km rating is based on a standard optical link budget, not only the physical fiber length. Please include fiber attenuation, connector loss, splice loss, and CWDM MUX/DEMUX insertion loss when calculating the total link loss; this is the best way to confirm whether the link has enough margin.

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Juniper EX-SFP-10GE-CWE55 Compatible LINK-PP 10G SFP+ CWDM 1550nm 40km Duplex LC DOM SMF Optical Transceiver Module

Name: Juniper EX-SFP-10GE-CWE55 Compatible LINK-PP 10G SFP+ CWDM 1550nm 40km Duplex LC DOM SMF Optical Transceiver Module
Brand: LINK-PP
SKU: 221941
Price: 220.16 USD
Availability: InStock
Rating: 4.9 (29 reviews)

# 221941

Product: Juniper EX-SFP-10GE-CWE55 Compatible LINK-PP 10G SFP+ CWDM 1550nm 40km Duplex LC DOM SMF Optical Transceiver Module
SKU: 221941
P/N: LS-CW5510-40C
Price: $ 256
Stock: 347 in Stock
Sold: 731
Product URL: https://www.l-p.com/products/484228.htm

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Manufacture: LINK-PP

P/N: LS-CW5510-40C

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-CWE55 Compatible LINK-PP 10G SFP+ Specifications

EX-SFP-10GE-CWE55 employs a cooled EML transmitter and PIN receiver at a 1550nm CWDM wavelength, supporting extended 40 km SMF links through a duplex LC interface, and incorporates real-time DOM features to monitor module status and optical performance.

Juniper Part Number	EX-SFP-10GE-CWE55	Vendor Name	LINK-PP
Form Factor	SFP+	Max Data Rate	10.7Gbps
Wavelength	1550nm	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: We already have 1470nm, 1510nm, 1530nm, and 1570nm channels running on our passive CWDM Mux/Demux. Can we plug this 1550nm module straight into the open channel slot? By Q***d on 2026-04-01

A: Yes, absolutely. 1550nm is a standard channel on the ITU-T G.694.2 CWDM grid with a 20nm channel spacing. As long as your Mux/Demux filter unit has a dedicated 1550nm port available (and you match it with a 1550nm CWDM transceiver at the remote end), the LS-CW5510-40C will integrate seamlessly without causing crosstalk or interfering with your existing wavelengths. By admin on 2026-04-02
Q: We have existing OS2 single-mode fiber and duplex LC patch cords. Is this module compatible with our cabling? By O***n on 2026-01-09

A: Yes. This module is designed for single-mode fiber transmission and uses a duplex LC optical interface. OS2 fiber is commonly used for long-distance 10G CWDM links and is suitable for this 40 km module. By admin on 2026-01-10
Q: Is the 0–70°C rating the ambient temperature or the module case temperature? By N***s on 2025-10-11

A: The stated specification is the operating case temperature of the module. Since internal switch heat and airflow can make the module case warmer than the surrounding air, it is important to leave sufficient thermal margin in high-density equipment. By admin on 2025-10-12
Q: Our fiber route is 32km, with several splices and patch panels. Is the 40km distance enough? By P***y on 2025-08-18

A: The 40km rating is based on a standard optical link budget, not only the physical fiber length. Please include fiber attenuation, connector loss, splice loss, and CWDM MUX/DEMUX insertion loss when calculating the total link loss; this is the best way to confirm whether the link has enough margin. By admin on 2025-08-19

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A***r

Turkey

Verified Purchase

5 .0

2026-04-13

Ordered these for a small data center expansion where we needed 10GbE over existing SMF. The duplex LC CWDM optics transceivers were individually protected, installed without issue, and showed stable optical power levels after burn-in.

87 Helpful vote Comments

M***r

Bangladesh

Verified Purchase

5 .0

2026-04-08

This 10G SFP+ 1550nm CWDM module was installed for an indoor backhaul aggregation handoff over Duplex LC single-mode fiber. We specifically wanted CWDM optics rather than a generic short-reach module because the route had a longer patch-panel path and planned CWDM growth. The reported TX power range and receiver monitoring gave our NOC enough information to baseline the circuit. For commercial indoor cabinets operating within 0–70°C, it has been a straightforward, cost-effective choice.

139 Helpful vote Comments

J***n

Lithuania

Verified Purchase

4 .0

2026-03-31

Performance has been good on our 40km SMF test path, and the module feels like good value for routine enterprise deployments. I would just like more outer-box padding for small quantities.

16 Helpful vote Comments

S***n

Belgium

Verified Purchase

5 .0

2026-03-06

Clean optical spectrum, zero frame loss on our backbone ring.

78 Helpful vote Comments

N***s

Macao

Verified Purchase

4 .0

2026-02-16

Reliable 10GbE CWDM performance and fair value for a 1550nm 40km single-mode module. We would prefer more individual box cushioning for overseas bulk shipments, but the optics themselves arrived functional and tested well.

21 Helpful vote Comments

A***h

Finland

Verified Purchase

5 .0

2026-02-07

Great value for a 1550nm CWDM 10G SFP+ long-reach optical module.

74 Helpful vote Comments

E***e

Hungary

Verified Purchase

5 .0

2026-01-11

A practical option when you need 10G CWDM transport without paying premium pricing. The commercial 0–70°C rating suits our indoor telecom room, and the SFF-8472 diagnostics are a nice plus.

81 Helpful vote Comments

C***n

Israel

Verified Purchase

5 .0

2025-12-14

We deployed several 1550nm CWDM SFP+ modules in a regional fiber aggregation project. Link establishment was fast, the EML CWDM optics stayed stable, and the DOM data was useful during commissioning.

78 Helpful vote Comments

I***n

Brunei Darussalam

Verified Purchase

5 .0

2025-10-05

If you are building out CWDM wavelength channels on 10G single-mode fiber links, this optic delivers exactly what is advertised. Receiver sensitivity is excellent over long patch lines, and digital optical diagnostics integrate smoothly into SNMP monitoring systems.

114 Helpful vote Comments

C***s

Austria

Verified Purchase

5 .0

2025-09-24

Stable link at 40km with no surprises — exactly what we needed.

69 Helpful vote Comments

J***d

Cambodia

Verified Purchase

5 .0

2025-07-18

Bought these for a high-density 10G switch cluster linking two remote distribution facilities. The 1550nm CWDM wavelength alignment is precise, avoiding channel crosstalk on our multiplexer trays. Excellent value for enterprise deployment.

91 Helpful vote Comments

R***n

Nepal

Verified Purchase

5 .0

2025-06-08

We deployed the LS-CW5510-40C CWDM module on a 10GbE campus backbone carrying virtualization, voice, and security traffic between buildings. Our single-mode route is well below the 40km maximum, but we selected the 1550nm CWDM optic to align with the existing wavelength plan. DOM was available immediately for checking transmit power, receive power, module temperature, and supply status during turn-up. After several weeks of normal traffic, the link has remained stable with no unexpected errors.

122 Helpful vote Comments

G***y

Bulgaria

Verified Purchase

5 .0

2025-05-01

Upgraded our regional node transport layer using these 1550nm CWDM SFP+ modules. The duplex LC interface clicked firmly into place with zero slop. Link attenuation stayed well within budget over 28km of older outdoor fiber plant. Will order another 50 units for next month’s metro network expansion.

123 Helpful vote Comments

K***n

Morocco

Verified Purchase

4 .0

2025-04-15

The module passed our indoor rack test and worked well in a multi-device deployment. Delivery was safe overall, although the outer carton had minor compression from transit.

28 Helpful vote Comments

G***u

Australia

Verified Purchase

5 .0

2025-04-10

No complaints out of me... keep up the good work LINK-PP.

68 Helpful vote Comments

V***n

Australia

Verified Purchase

5 .0

2025-01-24

Very satisfied with customer service.

49 Helpful vote Comments

M***l

United States

Verified Purchase

5 .0

2024-12-31

Is great i have the product and works perfectly i am satisfied with the product the deliver was very well

59 Helpful vote Comments

A***i

United States

Verified Purchase

5 .0

2024-09-29

Product works as described. I have done business with them all in the past and have always had successful outcomes.

42 Helpful vote Comments

M***n

Libyan Arab Jamahiriya

Verified Purchase

5 .0

2024-09-20

Great item good price quick shipping. Been a customer in the past and will in the future.

66 Helpful vote Comments

B***i

Lithuania

Verified Purchase

5 .0

2024-09-12

Items delivered on time and buying experience was smooth and seamless.

77 Helpful vote Comments

G***f

United States

Verified Purchase

5 .0

2024-08-30

Always friendly and reliable.

28 Helpful vote Comments

A***a

United States

Verified Purchase

5 .0

2024-08-22

Excellent service. 10/25/40G Transceiver Modules arrived Faster than expected, appropriately packaged, and have significantly improved data transfer speed.

56 Helpful vote Comments

M***t

Russian Federation

Verified Purchase

5 .0

2024-06-28

I'm very happy with my transaction and purchase. The Optical Transceiver Module works with no issue. I would definitely recommend this company for customer service and speed. I will be purchasing from them again in the future.

74 Helpful vote Comments

J***a

United States

Verified Purchase

5 .0

2024-05-16

Excellent, Fast service. I will definitely order from there again.

56 Helpful vote Comments

R***e

Norway

Verified Purchase

5 .0

2023-12-07

LINK-PP is the most user-friendly website I have ever found. It has very knowledgeable staff and offers various good products at a reasonable price. Also, the Fast delivery has helped me save a lot of time.

56 Helpful vote Comments

H***e

Italy

Verified Purchase

5 .0

2023-11-10

Very good for crimping, not bad for cutting,

24 Helpful vote Comments

B***o

Libyan Arab Jamahiriya

Verified Purchase

5 .0