Are these transceivers compliant with standard datacenter safety and environmental regulations? We need CE and RoHS for our EU sites.

Yes, safety and compliance are baked right in. These modules meet Class 1 FDA Laser Safety requirements and are fully CE, RoHS, FCC, and UL certified. You are completely clear for compliant, large-scale deployments across all EU and US facilities.

We have legacy OM3 fiber in our building but need to run a 15km backbone to another site. Will this Simplex LC module work with multimode?

No, this specific BiDi transceiver is designed exclusively for Single Mode Fiber (SMF) to achieve the 20km distance using 1550nm-TX/1310nm-RX wavelengths. If you try running it over OM3 multimode, you'll experience severe signal loss. You must use a single strand of SMF for this link.

How does the total cost of ownership compare to OEM Cisco GLC-BX-20D optics? Our IT budget is getting tighter this year.

You're looking at a massive TCO reduction. By using our LINK-PP 1G SFP BiDi modules, you cut hardware costs by up to 80% compared to OEM optics, while getting the exact same 20km range, DOM features, and 1.25Gbps performance. The ROI for enterprise and campus networks is unbeatable.

We run a mix of Cisco C9300s and Fortinet firewalls. Do I need to buy different coded versions, or will this one LS-BL55311G-20C model sync across both?

This module is standard MSA compliant and works flawlessly across multi-vendor environments. Our engineers have tested the LS-BL55311G-20C to plug-and-play with Cisco, Fortinet, Juniper, HPE, and Dell without triggering any "unsupported transceiver" errors.

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HW SFP-GE-20-SM1550-U Compatible LINK-PP 1G SFP BiDi 1550nm-TX/1310nm-RX 20km Simplex LC DOM SMF Optical Transceiver Module

Name: HW SFP-GE-20-SM1550-U Compatible LINK-PP 1G SFP BiDi 1550nm-TX/1310nm-RX 20km Simplex LC DOM SMF Optical Transceiver Module
Brand: LINK-PP
SKU: 217216
Price: 6.45 USD
Availability: InStock
Rating: 4.9 (17 reviews)

# 217216

Product: HW SFP-GE-20-SM1550-U Compatible LINK-PP 1G SFP BiDi 1550nm-TX/1310nm-RX 20km Simplex LC DOM SMF Optical Transceiver Module
SKU: 217216
P/N: LS-BL55311G-20C
Price: $ 7.5
Stock: 937 in Stock
Sold: 775
Product URL: https://www.l-p.com/products/477495.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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Manufacture: LINK-PP

P/N: LS-BL55311G-20C

Compatible:: Cisco; LINK-PP; Brocade; DELL; Extreme; FS; Fortinet; Generic; H3C; HPE; HW; Juniper; Mikrotik; Netgear; TRENDnet

Compatible P/N:: 0231A11U | 10km; 0231A11V | 10km; SFP-GE-10-SM1310 | 10km; SFP-GE-10-SM1550 | 10km; SFP-GE-20-SM1310 | 20km; SFP-GE-20-SM1310-D | 20km; SFP-GE-20-SM1490 | 20km; SFP-GE-20-SM1550-U | 20km; LE2MGSC40DE0 | 40km; LE2MGSC40ED0 | 40km; SFP-GE-80-SM1490-U | 80km; SFP-GE-80-SM1550-D | 80km; LE2MGSC120DE0 | 120km; LE2MGSC120ED0 | 120km

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HW SFP-GE-20-SM1550-U Compatible LINK-PP 1G BiDi SFP Specifications

The HW SFP-GE-20-SM1550-U Compatible LINK-PP module is a high-performance 1G BiDi SFP optical transceiver designed for efficient Gigabit Ethernet connectivity. This hot-pluggable module utilizes WDM technology over single-mode fiber, delivering data rates up to 1.25Gbps. Compliant with SFP MSA standards, it offers a highly cost-effective networking solution for modern optical communication systems.

HW Part Number	SFP-GE-20-SM1550-U	Vendor Name	LINK-PP
Form Factor	SFP	Max Data Rate	1.25Gbps
Wavelength	1550nm-TX/1310nm-RX	Max Cable Distance	20km
Connector	Simplex LC	Media	SMF
Transmitter Type	DFB	Receiver Type	PIN
TX Power	-9 to 0dBm	RX Power	-23 to -1dBm
Receiver Sensitivity	<-23dBm	DOM Support	Yes
Operating Temperature Range	0 to 70°C	Protocols	Fast Ethernet, Gigabit Fibre Channel, MSA Compliant

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Q: Are these transceivers compliant with standard datacenter safety and environmental regulations? We need CE and RoHS for our EU sites. By J***n on 2026-02-22

A: Yes, safety and compliance are baked right in. These modules meet Class 1 FDA Laser Safety requirements and are fully CE, RoHS, FCC, and UL certified. You are completely clear for compliant, large-scale deployments across all EU and US facilities. By admin on 2026-02-22
Q: We have legacy OM3 fiber in our building but need to run a 15km backbone to another site. Will this Simplex LC module work with multimode? By J***l on 2025-10-01

A: No, this specific BiDi transceiver is designed exclusively for Single Mode Fiber (SMF) to achieve the 20km distance using 1550nm-TX/1310nm-RX wavelengths. If you try running it over OM3 multimode, you'll experience severe signal loss. You must use a single strand of SMF for this link. By admin on 2025-10-01
Q: How does the total cost of ownership compare to OEM Cisco GLC-BX-20D optics? Our IT budget is getting tighter this year. By D***r on 2025-09-12

A: You're looking at a massive TCO reduction. By using our LINK-PP 1G SFP BiDi modules, you cut hardware costs by up to 80% compared to OEM optics, while getting the exact same 20km range, DOM features, and 1.25Gbps performance. The ROI for enterprise and campus networks is unbeatable. By admin on 2025-09-12
Q: We run a mix of Cisco C9300s and Fortinet firewalls. Do I need to buy different coded versions, or will this one LS-BL55311G-20C model sync across both? By J***t on 2025-07-11

A: Hey! This module is standard MSA compliant and works flawlessly across multi-vendor environments. Our engineers have tested the LS-BL55311G-20C to plug-and-play with Cisco, Fortinet, Juniper, HPE, and Dell without triggering any "unsupported transceiver" errors. By admin on 2025-07-11

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P***l

Mexico

Verified Purchase

5 .0

2026-04-25

Cheapest Cisco compatible 1G optic online.

64 Helpful vote Comments

R***r

Pakistan

Verified Purchase

5 .0

2026-03-22

Plug and play 1.25Gbps optical transceiver USA!

23 Helpful vote Comments

J***r

Colombia

Verified Purchase

5 .0

2025-12-09

Needed a cheap SFP module for Mikrotik switches. These 1550nm-TX optics delivered perfectly!

235 Helpful vote Comments

S***n

Egypt

Verified Purchase

5 .0

2025-12-05

Fast shipping, solid LC fiber transceiver.

54 Helpful vote Comments

C***z

Canada

Verified Purchase

4 .0

2025-12-04

Good 1G SFP BiDi transceiver, but the shipping box was slightly crushed. Optics survived.

105 Helpful vote Comments

J***z

Peru

Verified Purchase

5 .0

2025-10-25

DOM readings match perfectly across our network.

167 Helpful vote Comments

D***n

Norway

Verified Purchase

5 .0

2025-08-02

Digital diagnostics work great in Juniper gear.

51 Helpful vote Comments

J***l

Peru

Verified Purchase

5 .0

2025-06-28

20km SMF links came up instantly, no issues.

83 Helpful vote Comments

D***r

Netherlands

Verified Purchase

5 .0

2025-05-19

Tested this LS-BL55311G-20C in a multi-brand switch lab. HPE and Netgear synced instantly.

97 Helpful vote Comments

S***n

Russian Federation

Verified Purchase

5 .0

2025-04-27

Excellent 20km single mode SFP for our building-to-building fiber run. DOM is super accurate.

71 Helpful vote Comments

L***n

Thailand

Verified Purchase

5 .0

2025-04-16

Managing a homelab, I needed affordable 1G SFP BiDi modules. With just one Simplex LC strand, I linked my NAS to a Brocade core switch. The 0-70°C commercial temp holds up perfectly.

190 Helpful vote Comments

R***z

Austria

Verified Purchase

5 .0

2025-02-18

Perfect 1G SFP BiDi for Mikrotik router!

90 Helpful vote Comments

M***i

Taiwan, Province of China

Verified Purchase

5 .0

2024-06-20

Quality at a bargain price. Simply works! Fast and reliable shipping

29 Helpful vote Comments

C***a

Brunei Darussalam

Verified Purchase

5 .0

2024-05-24

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

36 Helpful vote Comments

P***e

Thailand

Verified Purchase

5 .0

2023-11-23

Product and price were as promised. Customer service and communications need to be improved.

55 Helpful vote Comments

G***i

Germany

Verified Purchase

5 .0

2023-06-14

I have purchased numerous products from Link-pp and have highly recommended them to my friends due to their vast selection and inventory, easy to use website, Fast shipping. Keep up the good work, guys!

53 Helpful vote Comments

J***x

Hong Kong

Verified Purchase

5 .0

2023-03-31

cheap and high quality. The items arrived a day earlier than expected and were all correct and easy to install. The customer service is great, the confirmation and delivery emails are worth just buying something again.

3 Helpful vote Comments