Will this 1270nm SFP integrate seamlessly into our existing 18-channel CWDM MUX/DEMUX chassis using duplex LC patch cords?

Yes. The transceiver strictly adheres to ITU-T G.694.2 CWDM grid specifications and features a standard duplex LC interface. Its optical launch power and high-sensitivity PIN receiver provide sufficient power budget to pass cleanly through passive single-mode MUX/DEMUX filters with minimal insertion loss penalties.

Is it possible to deploy this 1270nm CWDM SFP over legacy multimode fiber for a short intra-building run?

No. The LS-CW271G-80C CWDM module is built specifically for single-mode Fiber. Running it over multimode fiber introduces severe modal dispersion and high optical coupling loss.

How does long-term, unpowered storage in sub-zero winter warehouse conditions affect this commercial-grade 1G SFP module?

The module handles sub-zero warehouse conditions without issue. While active operating limits are 0°C to 70°C, the non-operating storage rating spans -40°C to 85°C, making unpowered cold storage completely safe.

Does this 1270nm module support Fibre Channel traffic alongside standard Ethernet across our shared metro fiber ring?

Yes. The transceiver natively supports both 1.063Gbps Fibre Channel and 1.25Gbps Gigabit Ethernet, allowing you to run storage area network (SAN) traffic across the 1270nm multiplexed CWDM channel.

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FS CW-SFP1G80-27 Compatible LINK-PP 1G SFP CWDM 1270nm 80km Duplex LC DDM SMF Optical Transceiver Module

Name: FS CW-SFP1G80-27 Compatible LINK-PP 1G SFP CWDM 1270nm 80km Duplex LC DDM SMF Optical Transceiver Module
Brand: LINK-PP
SKU: 224972
Price: 41.28 USD
Availability: InStock
Rating: 4.9 (18 reviews)

Product: FS CW-SFP1G80-27 Compatible LINK-PP 1G SFP CWDM 1270nm 80km Duplex LC DDM SMF Optical Transceiver Module
SKU: 224972
P/N: LS-CW271G-80C
Price: $ 48
Stock: 133 in Stock
Sold: 495
Product URL: https://www.l-p.com/products/497630.htm

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18 Reviews

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$ 48

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Manufacture: LINK-PP P/N: LS-CW271G-80C SKU: 224972

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

Wavelength:: 1270nm; 1310nm; 1330nm; 1350nm

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FS CW-SFP1G80-27 Compatible LINK-PP 1G SFP Specifications

CW-SFP1G80-27 CWDM SFP module provides 1Gbps data rate over a 1270nm CWDM wavelength, built with a DFB laser and PIN receiver, and achieves an 80km link budget on single-mode fiber. It incorporates real-time DDM functionality covering Tx/Rx power, supply voltage, bias current, and temperature. The standard operating temperature range is 0 to +70°C.

FS Part Number	CW-SFP1G80-27	Vendor Name	LINK-PP
Form Factor	SFP	Max Data Rate	1.25Gbps
Wavelength	1270nm	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 (Electromagnetic Compatibility)	Supported	DDM Support	Yes
Operating Temperature Range	0 to 70°C	Protocols	SFP MSA、SFF-8472

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Q: Will this 1270nm SFP integrate seamlessly into our existing 18-channel CWDM MUX/DEMUX chassis using duplex LC patch cords? By C***s on 2026-03-20

A: Yes. The transceiver strictly adheres to ITU-T G.694.2 CWDM grid specifications and features a standard duplex LC interface. Its optical launch power and high-sensitivity PIN receiver provide sufficient power budget to pass cleanly through passive single-mode MUX/DEMUX filters with minimal insertion loss penalties. By admin on 2026-03-21
Q: Is it possible to deploy this 1270nm CWDM SFP over legacy multimode fiber for a short intra-building run? By B***h on 2026-01-04

A: No. The LS-CW271G-80C CWDM module is built specifically for single-mode Fiber. Running it over multimode fiber introduces severe modal dispersion and high optical coupling loss. By admin on 2026-01-05
Q: How does long-term, unpowered storage in sub-zero winter warehouse conditions affect this commercial-grade 1G SFP module? By A***r on 2025-06-29

A: The module handles sub-zero warehouse conditions without issue. While active operating limits are 0°C to 70°C, the non-operating storage rating spans -40°C to 85°C, making unpowered cold storage completely safe. By admin on 2025-06-30
Q: Does this 1270nm module support Fibre Channel traffic alongside standard Ethernet across our shared metro fiber ring? By A***s on 2025-05-18

A: Yes. The transceiver natively supports both 1.063Gbps Fibre Channel and 1.25Gbps Gigabit Ethernet, allowing you to run storage area network (SAN) traffic across the 1270nm multiplexed CWDM channel. By admin on 2025-05-19

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C***s

Belgium

Verified Purchase

5 .0

2026-04-22

We used this 1270nm CWDM 80km SFP transceiver to connect two university research hubs across town over single-mode fiber. Latency is negligible and MSA compliance made it fully plug-and-play with our optical core switch.

81 Helpful vote Comments

I***h

Sweden

Verified Purchase

5 .0

2026-03-30

Clean duplex LC latching and exact 1270nm grid alignment. Will order more spares! (•‿•)

56 Helpful vote Comments

F***n

Thailand

Verified Purchase

5 .0

2026-02-27

Used in a campus upgrade: 1270nm CWDM 1G SFP over existing SMF patch panels. No compatibility issues, DDM shows real-time optical power, and the BER stays solid.

100 Helpful vote Comments

E***s

Malaysia

Verified Purchase

5 .0

2026-01-04

We replaced legacy optical transceivers with these 1270nm CWDM units to free up spectrum. The 80km SMF reach is accurate, and the DDM data helps us validate fiber health remotely. No packet loss during failover tests.

109 Helpful vote Comments

E***r

Turkey

Verified Purchase

5 .0

2025-12-08

During a campus network refresh, we replaced legacy optics with these 1270nm CWDM modules to align with our multiplexer grid. Every port came up cleanly on first insert, and the switches recognized the transceivers without custom coding. Real-time optical diagnostics feed neatly into our NMS, making it easy to validate link health remotely. The modules run cool in dense chassis and maintain steady performance under variable load. We’ve since standardized this module for all new 1G CWDM 1270nm deployments. Excellent fit for structured fiber designs and future-proof channel planning.

159 Helpful vote Comments

J***e

Republic of Korea

Verified Purchase

5 .0

2025-11-19

Plugged this 1270nm CWDM optic into our distribution switch, link came up instantly across a 62km dark fiber span.

46 Helpful vote Comments

C***y

Austria

Verified Purchase

5 .0

2025-11-11

Purchased these 1G CWDM modules for a regional cell tower backhaul project. The optical link budget easily cut through our patch panel insertion losses without needing optical amplification. Highly recommended!

92 Helpful vote Comments

C***n

Israel

Verified Purchase

5 .0

2025-09-21

In a service provider access scenario, these SFPs helped us extend 1G CWDM services to new customer premises over existing fiber. The provisioning process was smooth, with quick link establishment and stable performance from day one. Optical diagnostics give our support team the confidence to troubleshoot remotely without site visits. The modules coexist well with other CWDM wavelengths in our multiplexer bays. We’ve had zero field failures so far, which is exactly what we need at scale. A practical, low-risk choice for 1G CWDM access deployments.

127 Helpful vote Comments

H***r

Italy

Verified Purchase

5 .0

2025-09-09

Installed 20 units of these CWDM modules in our aggregation node; clean EEPROM identification and rock-solid 1.25Gbps throughput.

84 Helpful vote Comments

D***s

New Zealand

Verified Purchase

5 .0

2025-08-04

Our field techs appreciate the standard Duplex LC interface — no special adapters needed. The TX power sits comfortably within our link budget, and RX overload limits are respected even on shorter patched links. Reliable for 1G Ethernet.

86 Helpful vote Comments

J***d

Netherlands

Verified Purchase

5 .0

2025-07-28

Added channel 1270nm to our passive mux without any link flapping, zero CRC errors.

63 Helpful vote Comments

A***s

Romania

Verified Purchase

5 .0

2025-07-19

Matched this 1270nm SFP module with our 1310nm/1550nm CWDM channels on the same fiber pair. Zero crosstalk issues and clean wavelength separation. A very economical way to multiply fiber capacity.

85 Helpful vote Comments

Q***e

Denmark

Verified Purchase

4 .0

2025-05-07

These 1G SFP optical transceivers perform great — 1270nm CWDM, 80km SMF, DDM all spot-on. Only nit: one module’s label was slightly crooked, but functionality is perfect.

31 Helpful vote Comments

A***e

Ukraine

Verified Purchase

5 .0

2024-12-25

We integrated these 1G CWDM 1270nm SFP modules into a multi-site fiber backbone and monitored them continuously during peak traffic windows. The links remained stable across all aggregation nodes, with clean handshakes and consistent DDM telemetry in our monitoring stack. Deployment was straightforward using standard Duplex LC patch cords and existing SMF infrastructure. For 1G CWDM channel plans, this wavelength slot fills a critical gap without requiring hardware changes. Our NOC team appreciates the predictable behavior during failover and maintenance windows.

142 Helpful vote Comments

F***t

Philippines

Verified Purchase

5 .0

2024-12-08

We needed a cost-effective 1.25Gbps CWDM option for point-to-point links. These modules hit the spec: TX -1 to +4 dBm, RX sensitivity -26 dBm, and stable operation at 0–70°C. Pairing with our CWDM MUX was seamless.

124 Helpful vote Comments

I***r

Spain

Verified Purchase

5 .0

2024-11-19

High-sensitivity PIN receiver easily handled our 68km inter-site fiber run.

78 Helpful vote Comments

D***h

Indonesia

Verified Purchase

5 .0

2024-11-05

Ordered a batch for a multi-site LTE backhaul refresh. The 1G SFP CWDM 1270nm 80km spec fits our design, and the modules interoperate cleanly with our CWDM multiplexers. Support was responsive on lead times.

97 Helpful vote Comments

B***n

Poland

Verified Purchase

5 .0

2024-10-18

We needed a long-distance 1270nm CWDM SFP to reclaim dark fiber capacity between our headquarters and backup data facility. Decent optical margin at 55km, latching mechanism is durable, and transceiver diagnostics integrated cleanly into our monitoring system.

131 Helpful vote Comments