Our fiber route is about 72 km and includes patch panels and splice points. Can we use this 80km CWDM SFP module for the link?

Potentially, yes. The 80km rating is the maximum nominal transmission distance, but the total fiber loss must remain within the module’s optical budget after including fiber attenuation, connector loss, splice loss, and CWDM MUX/DEMUX insertion loss.

We already have a 1470nm CWDM module at the remote end. Can we pair it with this LS-CW451G-80C 1450nm module?

No. For a normal duplex CWDM connection, both ends should use matching 1450nm modules. A 1450nm module should not be directly paired with a 1470nm module.

Our modules are installed inside a controlled central office, but some racks run warm during peak traffic. Is the 0°C to +70°C rating based on ambient temperature or module case temperature?

The stated 0°C to +70°C specification is the operating case-temperature range. Actual module case temperature can be higher than room ambient temperature, depending on airflow, switch design, port density, and power consumption.

Our switch provides a standard 3.3V SFP power supply. Does this module need any additional power connection?

No. The LS-CW451G-80C module operates from a single +3.3V power supply through the SFP host interface and does not require an external power connection.

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LINK-PP LS-CW451G-80C 1G SFP CWDM 1450nm 80km Duplex LC DDM SMF Optical Transceiver Module

Name: LINK-PP LS-CW451G-80C 1G SFP CWDM 1450nm 80km Duplex LC DDM SMF Optical Transceiver Module
Brand: LINK-PP
SKU: 203226
Price: 43 USD
Availability: InStock
Rating: 4.9 (27 reviews)

# 203226

Product: LINK-PP LS-CW451G-80C 1G SFP CWDM 1450nm 80km Duplex LC DDM SMF Optical Transceiver Module
SKU: 203226
P/N: LS-CW451G-80C
Price: $ 50
Stock: 178 in Stock
Sold: 922
Product URL: https://www.l-p.com/products/492692.htm

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Compatible:: Cisco; LINK-PP; Arista; Brocade; Ciena; Dell; Extreme; Juniper; Netgear

Wavelength:: 1270nm; 1290nm; 1310nm; 1330nm; 1350nm; 1370nm; 1390nm; 1410nm; 1430nm; 1450nm; 1470nm; 1490nm; 1510nm; 1530nm; 1550nm; 1570nm; 1590nm; 1610nm

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LINK-PP LS-CW451G-80C 1G SFP Specifications

LS-CW451G-80C comes as a 1450nm CWDM SFP module with support for data rates of up to 1.25Gbps. Built with a DFB laser and PIN photodiode, it delivers transmission over SMF distances of up to 80km and operates within a 0 to +70°C temperature range. Real-time digital diagnostic monitoring enables continuous monitoring of essential module parameters and operating status.

LINK-PP Part Number	LS-CW451G-80C	Vendor Name	LINK-PP
Form Factor	SFP	Max Data Rate	1.25Gbps
Wavelength	1450nm	Max Cable Distance	80km
Connector	Duplex LC	Media	SMF
Transmitter Type	DFB	Receiver Type	PIN
TX Power	-1 to +4dBm	RX Power	-26 to -1dBm
Receiver Sensitivity	-26dBm	Receiver Overload	-1dBm
EMC (Electro Magnetic Comnatihilitv)	Supported	DDM	Supported
Operating Temperature Range	0 to 70°C	Protocols	SFP MSA、SFF-8472

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Q: Our fiber route is about 72 km and includes patch panels and splice points. Can we use this 80km CWDM SFP module for the link? By Q***e on 2026-03-10

A: Potentially, yes. The 80km rating is the maximum nominal transmission distance, but the total fiber loss must remain within the module’s optical budget after including fiber attenuation, connector loss, splice loss, and CWDM MUX/DEMUX insertion loss. By admin on 2026-03-11
Q: We already have a 1470nm CWDM module at the remote end. Can we pair it with this LS-CW451G-80C 1450nm module? By R***k on 2026-01-21

A: No. For a normal duplex CWDM connection, both ends should use matching 1450nm modules. A 1450nm module should not be directly paired with a 1470nm module. By admin on 2026-01-22
Q: Our modules are installed inside a controlled central office, but some racks run warm during peak traffic. Is the 0°C to +70°C rating based on ambient temperature or module case temperature? By P***g on 2025-06-29

A: The stated 0°C to +70°C specification is the operating case-temperature range. Actual module case temperature can be higher than room ambient temperature, depending on airflow, switch design, port density, and power consumption. By admin on 2025-06-30
Q: Our switch provides a standard 3.3V SFP power supply. Does this module need any additional power connection? By S***n on 2025-05-19

A: No. The LS-CW451G-80C module operates from a single +3.3V power supply through the SFP host interface and does not require an external power connection. By admin on 2025-05-20

Customer Reviews
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V***y

Sweden

Verified Purchase

5 .0

2026-05-25

Good fit for a long-distance enterprise network where we still have active 1GbE access switches. The 1G SFP format saved us from replacing working equipment while adding another CWDM wavelength to the existing SMF pair.

90 Helpful vote Comments

N***r

South Africa

Verified Purchase

5 .0

2026-04-22

We needed 1450nm CWDM modules specifically, not a generic 1310nm long-reach SFP. This module matched our CWDM channel plan, delivered a stable 1.25G connection, and fit our duplex LC patching setup perfectly.

61 Helpful vote Comments

L***n

Canada

Verified Purchase

5 .0

2026-04-03

Good optical budget for our long campus backbone.

51 Helpful vote Comments

P***s

India

Verified Purchase

5 .0

2026-03-30

Hot-swapped into our aggregation rack without a single glitch or port flap. (•‿•)

66 Helpful vote Comments

L***t

New Zealand

Verified Purchase

5 .0

2026-03-09

Installed as part of a multi-vendor switch refresh where legacy access equipment still relies on standard SFP ports. We provided the required host coding information before ordering, and the modules were delivered ready for our planned device profile. On a 57km single-mode fiber link, the 1.25Gbps port negotiated normally and stayed stable through traffic tests. The Duplex LC interface was convenient because the field plant already used LC patch panels, and DOM helped quickly identify one dirty connector during installation.

99 Helpful vote Comments

S***x

Norway

Verified Purchase

5 .0

2026-02-27

A practical option for a 1G backbone over single-mode fiber. Our techs like that it is a standard duplex LC SFP, so there is no special handling beyond checking polarity and cleaning the connectors.

85 Helpful vote Comments

J***k

United Kingdom

Verified Purchase

5 .0

2026-01-22

Solid 1G CWDM SFP for an 80km single-mode fiber run.

50 Helpful vote Comments

C***p

Finland

Verified Purchase

4 .0

2026-01-08

The 80km CWDM 1G SFP itself tested well, linked quickly, and the 1450nm channel matched our fiber plan. One carton arrived with a slightly crushed outer corner, although the anti-static packaging and modules inside were fine.

23 Helpful vote Comments

Q***h

Russian Federation

Verified Purchase

5 .0

2026-01-04

The module works well for long-haul 1G Ethernet transport where a 1450nm CWDM channel is needed. Vendor coding was handled before shipment, which made the rollout much faster for our operations team.

103 Helpful vote Comments

W***s

Netherlands

Verified Purchase

5 .0

2025-12-21

Ordered these 1G SFP modules for a CWDM MUX/DEMUX upgrade where the 1450nm channel was already assigned in the fiber plan. The modules came up quickly, and DDM monitoring lets our NOC keep an eye on transmit power, receive power, temperature, and supply voltage.

132 Helpful vote Comments

I***k

Poland

Verified Purchase

5 .0

2025-12-08

Our data-center team used this 1G 1450nm CWDM SFP module to carry management and storage-related traffic between facilities over single-mode fiber. It is not intended to turn a 1G port into 10G, but for legacy Gigabit interfaces it gives a clean, cost-conscious way to use a long CWDM span. The standard SFP MSA form factor seated properly, and the SFF-8472 DOM data integrated into our normal monitoring workflow.

159 Helpful vote Comments

N***e

Australia

Verified Purchase

5 .0

2025-11-19

Duplex LC connection, 1450nm channel, zero drama.

74 Helpful vote Comments

M***e

Malaysia

Verified Purchase

5 .0

2025-11-11

We deployed 18 units of the LS-CW451G-80C in a municipal campus network connecting branch buildings to a central data room. The longest fiber section was just under 73km after splice and patch-panel losses, so we selected the 80km CWDM 1G SFP to retain reasonable margin. Initial DDM readings showed TX around the expected range and receiver levels comfortably above the sensitivity threshold. After several weeks, interface counters remain clean with no observed packet loss or CRC growth.

134 Helpful vote Comments

T***s

Italy

Verified Purchase

5 .0

2025-10-29

These 1450nm CWDM SFP transceivers were purchased for a multi-site fiber ring. Each unit was recognized correctly, and the SFF-8472 digital diagnostics were useful during commissioning. No CRC errors so far.

128 Helpful vote Comments

D***y

Romania

Verified Purchase

4 .0

2025-09-21

Performance is good on our 68km SMF route, and the DDM values look normal after installation. Shipping took a little longer than expected for a small replacement order, but the optical modules were properly labeled and worked on arrival.

37 Helpful vote Comments

X***n

Republic of Korea

Verified Purchase

5 .0

2025-09-09

We used this LS-CW451G-80C 1450nm CWDM SFP to extend a 1G link between two campus buildings. The 80km rating gave us plenty of optical margin on our much shorter single-mode fiber route, and the duplex LC connector made replacement straightforward.

84 Helpful vote Comments

I***n

Germany

Verified Purchase

5 .0

2025-08-14

Installed cleanly and linked immediately on our 1450nm CWDM fiber path.

59 Helpful vote Comments

O***r

Thailand

Verified Purchase

5 .0

2025-08-04

Nice balance of price and performance for a commercial-grade 1G CWDM SFP. It is especially useful when upgrading fiber capacity is more practical than pulling another cable.

86 Helpful vote Comments

O***y

Brazil

Verified Purchase

5 .0

2025-07-28

Perfect 1450nm CWDM grid channel pass-through on our passive 8-channel mux.

63 Helpful vote Comments

K***n

Belgium

Verified Purchase

5 .0

2025-07-19

We evaluated a pair on a long enterprise fiber route that includes multiple fusion splices, distribution frames, and CWDM passive components. The 1450nm channel passed traffic continuously during a 72-hour soak test, while optical diagnostics remained consistent with the calculated loss budget. The -26dBm receiver sensitivity is useful for these longer links, although we still recommend validating actual attenuation and keeping appropriate engineering margin. This is a good commercial-temperature 80km CWDM SFP for indoor network cabinets and managed backbone sites.

144 Helpful vote Comments

R***r

Singapore

Verified Purchase

5 .0

2025-06-18

We installed a batch in an indoor equipment room for separate CWDM channels over one fiber route. The optical power values stayed within expected limits, and the modules have been stable through normal HVAC temperature swings.

71 Helpful vote Comments

J***y

Austria

Verified Purchase

5 .0

2025-05-14

This was purchased for a 1G base-station backhaul extension where available fiber was limited and the wavelength plan could not be changed. The module’s 1450nm CWDM wavelength allowed us to add capacity without deploying additional fiber pairs. We monitored DOM values during peak utilization and saw no abnormal drift in transmit or receive levels. The unit is commercial-grade rather than industrial temperature rated, so we installed it inside a conditioned enclosure as planned; for that environment, performance has been excellent.

132 Helpful vote Comments

K***k

France

Verified Purchase

5 .0

2025-05-09

DOM readings are stable and easy to verify from the switch CLI.

62 Helpful vote Comments

U***t

Spain

Verified Purchase

5 .0

2025-04-01

We tested the module on a remote telecom shelter link and got a stable connection with clean diagnostic values. The DFB transmitter and PIN receiver combination works well for this type of 80km CWDM deployment.

78 Helpful vote Comments

P***k

Philippines

Verified Purchase

5 .0

2025-03-24

Great module for point-to-point Gigabit links where trenching new fiber wasn't an option. Adding this 1450nm wavelength channel into our existing CWDM filter allowed us to spin up a dedicated backup link across 68km. Solid optical link stability over 30 days of continuous traffic.

137 Helpful vote Comments

Y***e

Mexico

Verified Purchase

5 .0

2025-02-11

Reliable CWDM 1G SFP module for remote-site connectivity.

58 Helpful vote Comments

M***h

Indonesia

Verified Purchase

5 .0

2025-01-08

Our operations team used these modules in a CWDM transport overlay for several 1GbE aggregation links. The key requirement was a 1450nm DFB CWDM transmitter compatible with our existing passive MUX/DEMUX channel map, plus readable SFF-8472 diagnostics. During acceptance testing, we checked temperature, voltage, laser bias, TX power, and RX power on both ends; the readings were consistent across the shipment. For commercial indoor racks operating within 0–70°C, this has been a dependable long-distance 1G SFP optical transceiver.

151 Helpful vote Comments