Is this 1310nm-TX/1550nm-RX module fully MSA compliant and does it support standard Gigabit Fibre Channel?

Yes. It is fully MSA (Multi-Source Agreement) compliant, ensuring universal form factor and signaling alignment. It also natively supports both Fast Ethernet and Gigabit Fibre Channel protocols for heavily regulated network environments.

Just to clarify for my installation crew, does this module take multimode or single-mode fiber, and what connector type is required?

This transceiver is designed exclusively for Single-Mode Fiber (SMF). Your field crew will need to use fiber patch cables with a Simplex LC connector to link up properly.

We run a mixed environment with Cisco Catalyst and Juniper EX series switches. Will this 1G BiDi SFP 40km module interoperate without throwing "unsupported transceiver" errors?

Yes, absolutely. The LS-BL31551G-40C features widespread OEM compatibility and is heavily tested for multi-brand interoperability. It will sync natively with both Cisco and Juniper switches right out of the box.

Our data center needs to batch deploy around 500 units for a massive campus networking upgrade. Do you offer volume discounts for enterprise procurement?

We definitely do. For bulk orders of 500 units or more, our tier-based pricing kicks in, reducing the unit cost significantly. Please reach out to our B2B sales team to get a formalized quote with the exact discount applied.

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D-Link DEM-331R Compatible LINK-PP 1G SFP BiDi 1310nm-TX/1550nm-RX 40km Simplex LC DOM SMF Optical Transceiver Module

Name: D-Link DEM-331R Compatible LINK-PP 1G SFP BiDi 1310nm-TX/1550nm-RX 40km Simplex LC DOM SMF Optical Transceiver Module
Brand: LINK-PP
SKU: 215383
Price: 7.31 USD
Availability: InStock
Rating: 4.9 (24 reviews)

# 215383

Product: D-Link DEM-331R Compatible LINK-PP 1G SFP BiDi 1310nm-TX/1550nm-RX 40km Simplex LC DOM SMF Optical Transceiver Module
SKU: 215383
P/N: LS-BL31551G-40C
Price: $ 8.5
Stock: 1184 in Stock
Sold: 2.5K
Product URL: https://www.l-p.com/products/477220.htm

For Order Over $1000 Get $15.00 Off , Code: Linkpp15

For Order Over $3000 Get $50.00 Off , Code: Linkpp50

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P/N: LS-BL31551G-40C

Compatible:: Cisco; LINK-PP; Brocade; D-Link; FS; Fortinet; Generic; H3C; Juniper; Netgear; TRENDnet

Compatible P/N:: DEM-330R | 10km; DEM-330T | 10km; DEM-331R | 40km; DEM-331T | 40km

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D-Link DEM-331R Compatible LINK-PP 1G BiDi SFP Specifications

The D-Link DEM-331R Compatible LINK-PP 1G BiDi SFP transceivers provide highly reliable Gigabit Ethernet data links over extended single-mode fiber infrastructure. Designed for high-performance optical networks, this commercial-grade SFP transceiver delivers stable 1.25Gbps bi-directional throughput over a single fiber core. It serves as an ideal solution for telecom, enterprise, and service provider network deployments worldwide.

D-Link Part Number	DEM-331R	Vendor Name	LINK-PP
Form Factor	SFP	Max Data Rate	1.25Gbps
Wavelength	1310nm-TX/1550nm-RX	Max Cable Distance	40km
Connector	Simplex LC	Media	SMF
Transmitter Type	DFB	Receiver Type	PIN
TX Power	-5 to 0dBm	RX Power	-23 to -1dBm
Receiver Sensitivity	<-24dBm	DOM Support	Yes
Operating Temperature Range	0 to 70°C	Protocols	Fast Ethernet, Gigabit Fibre Channel, MSA Compliant

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Q: Is this 1310nm-TX/1550nm-RX module fully MSA compliant and does it support standard Gigabit Fibre Channel? By J***e on 2026-04-03

A: Yes. It is fully MSA (Multi-Source Agreement) compliant, ensuring universal form factor and signaling alignment. It also natively supports both Fast Ethernet and Gigabit Fibre Channel protocols for heavily regulated network environments. By admin on 2026-04-03
Q: Just to clarify for my installation crew, does this module take multimode or single-mode fiber, and what connector type is required? By D***z on 2026-03-01

A: This transceiver is designed exclusively for Single-Mode Fiber (SMF). Your field crew will need to use fiber patch cables with a Simplex LC connector to link up properly. By admin on 2026-03-01
Q: We run a mixed environment with Cisco Catalyst and Juniper EX series switches. Will this 1G BiDi SFP 40km module interoperate without throwing "unsupported transceiver" errors? By D***n on 2025-12-25

A: Yes, absolutely. The LS-BL31551G-40C features widespread OEM compatibility and is heavily tested for multi-brand interoperability. It will sync natively with both Cisco and Juniper switches right out of the box. By admin on 2025-12-25
Q: Our data center needs to batch deploy around 500 units for a massive campus networking upgrade. Do you offer volume discounts for enterprise procurement? By A***n on 2025-10-29

A: We definitely do. For bulk orders of 500 units or more, our tier-based pricing kicks in, reducing the unit cost significantly. Please reach out to our B2B sales team to get a formalized quote with the exact discount applied. By admin on 2025-10-29

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S***s

Switzerland

Verified Purchase

5 .0

2026-06-29

Upgraded our park's fiber setup. The simplex LC interface saves so much cabling space.

170 Helpful vote Comments

P***k

Indonesia

Verified Purchase

5 .0

2026-06-09

DDM monitoring is accurate and highly responsive.

112 Helpful vote Comments

R***n

Spain

Verified Purchase

5 .0

2026-06-09

We did a massive multi-brand switch compatibility test for a campus networking project. This Cisco compatible 1G BiDi module worked flawlessly with H3C and Juniper. DDM readings remained incredibly stable.

107 Helpful vote Comments

K***z

Ecuador

Verified Purchase

5 .0

2026-05-29

I use this simplex LC optical transceiver for remote base station backhaul. Even near the 70°C upper limit in summer, the DOM feature shows zero optical power degradation. Highly recommended.

96 Helpful vote Comments

A***n

Spain

Verified Purchase

5 .0

2026-05-20

Procured these 1310nm-TX/1550nm-RX modules for our enterprise machine room batch deployment. Pushing Gigabit Ethernet over 35km SMF, the DFB transmitter barely breaks a sweat. Unbeatable value for B2B network ops.

44 Helpful vote Comments

E***z

Spain

Verified Purchase

5 .0

2026-05-20

Seamless compatibility across our multi-brand switches.

173 Helpful vote Comments

M***s

Israel

Verified Purchase

4 .0

2026-03-16

Delivery was delayed a day, but the 1G BiDi SFP 40km modules run perfectly.

86 Helpful vote Comments

L***t

Russian Federation

Verified Purchase

5 .0

2026-03-07

Running these DOM SMF transceivers in our data center bulk deployment. Super cost-effective.

138 Helpful vote Comments

M***s

Czech Republic

Verified Purchase

5 .0

2026-02-27

Perfect simplex LC transceiver for campus networking!

190 Helpful vote Comments

L***n

Australia

Verified Purchase

5 .0

2026-02-08

Reliable 40km transmission, zero dropped packets seen.

59 Helpful vote Comments

A***k

Panama

Verified Purchase

5 .0

2025-12-13

Installed in an unconditioned outdoor cabinet. Operating temp holds up fine for commercial grade. ☀️

143 Helpful vote Comments

R***s

Germany

Verified Purchase

5 .0

2025-12-06

DOM SMF transceiver works exactly as described.

207 Helpful vote Comments

D***g

Thailand

Verified Purchase

5 .0

2025-10-09

Great Tx/Rx light levels! DDM shows solid -3dBm over our 25km campus optical networking.

54 Helpful vote Comments

M***e

Hong Kong

Verified Purchase

5 .0

2024-05-21

Great price, Fast shipping, quality product.

44 Helpful vote Comments

L***g

Hong Kong

Verified Purchase

4 .0

2024-05-12

This is my go-to site for ordering high quality Sfp cage, especially customized ones. They always have the best prices and a great selection.

85 Helpful vote Comments

R***e

United States

Verified Purchase

5 .0

2024-03-22

Product was as advertised ... communication regarding shipment and delivery was excellent.

55 Helpful vote Comments

M***d

Turkey

Verified Purchase

5 .0

2024-03-14

Best prices easy ordering Fast shipping what else could you possibly ask for

60 Helpful vote Comments

S***i

Hong Kong

Verified Purchase

5 .0

2023-12-26

Everything was packaged correctly.

59 Helpful vote Comments

O***s

United States

Verified Purchase

5 .0

2023-10-17

l-p.com consistently has competitive prices on top of the line fiber optical components with great customer service and Fast shipping. It's a very trustworthy company to do business with.

63 Helpful vote Comments

W***n

Japan

Verified Purchase

5 .0

2023-06-21

Arrived as advertised, installed it and away we went.

67 Helpful vote Comments

M***n

India

Verified Purchase

5 .0

2023-04-29

Without the help of Yoeng, I would not have purchased such great items without seeing them in person. She helped me make the right product choices and provided instruction that answered all of my questions, which really helps me a lot.You can rely on LINK-PP!

82 Helpful vote Comments

B***r

United States

Verified Purchase

5 .0

2023-04-22

The items came right away and they were well packaged.

86 Helpful vote Comments

K***r

Malaysia

Verified Purchase

5 .0