How is your supply chain? If we need to source 1,000 of these 1310nm/1550nm SFPs quarterly, what is the typical lead time?

Our supply chain is highly robust with massive local stock for standard standard-rate SKUs. For a quarterly run rate of 1,000 units, we can schedule regular deliveries with zero delays. Standard bulk orders typically have a fast turnaround time of just 4-7 business days to locations across North America and Europe.

How does the total cost of ownership (TCO) for these Link-PP simplex LC modules compare to original OEM optics?

Our 1G SFP BiDi transceivers offer ultimate cost-performance, typically saving IT departments 70-80% compared to OEM branded optics. They deliver the exact same 1.25Gbps performance, precise DOM monitoring, and 20km transmission distance, drastically reducing your network deployment and long-term maintenance TCO.

We are planning a massive campus fiber network upgrade. Do you offer any tiered discounts for ordering these optical transceivers in batches of 500+?

Yes, we provide aggressive volume pricing for enterprise batch deployments. While the retail price is already highly competitive, purchasing bulk quantities will unlock significant per-unit discounts. Please reach out to our B2B sales team with your exact project needs for a custom quote!

Will this 1G SFP BiDi module sync up properly in a mixed environment using Cisco core switches and HPE edge switches?

Absolutely! The LS-BL31551G-20C is 100% MSA compliant and extensively tested for multi-brand interoperability. It works flawlessly as a plug-and-play solution across Cisco, HPE, Juniper, Dell, and other major OEM equipment without any vendor lock-in issues.

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FS SFP-1G35-BX20 Compatible LINK-PP 1G SFP BiDi 1310nm-TX/1550nm-RX 20km Simplex LC DOM SMF Optical Transceiver Module

Name: FS SFP-1G35-BX20 Compatible LINK-PP 1G SFP BiDi 1310nm-TX/1550nm-RX 20km Simplex LC DOM SMF Optical Transceiver Module
Brand: LINK-PP
SKU: 214212
Price: 12.47 USD
Availability: InStock
Rating: 5 (24 reviews)

# 214212

Product: FS SFP-1G35-BX20 Compatible LINK-PP 1G SFP BiDi 1310nm-TX/1550nm-RX 20km Simplex LC DOM SMF Optical Transceiver Module
SKU: 214212
P/N: LS-BL31551G-20C
Price: $ 14.5
Stock: 814 in Stock
Sold: 2.8K
Product URL: https://www.l-p.com/products/495189.htm

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

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

For Order Over $5000 Get $100.00 Off , Code: Linkpp100

New Users: $10 Coupon for Orders , Code: linkpp2610

24 Reviews

4 Questions

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2.8K Sold

$ 14.5

Free shipping over $600, If you need a more favorable price, please contact us directly.

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$ 13.775

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$ 13.34

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$ 12.905

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Manufacture: LINK-PP

P/N: LS-BL31551G-20C

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

Compatible P/N:: SFP-1G34-BX10 | 10km; SFP-1G35-BX10 | 10km; SFP-1G43-BX10 | 10km; SFP-1G53-BX10 | 10km; SFP-1G34-BX20 | 20km; SFP-1G35-BX20 | 20km; SFP-1G43-BX20 | 20km; SFP-1G53-BX20 | 20km; SFP-1G34-BX40 | 40km; SFP-1G35-BX40 | 40km; SFP-1G43-BX40 | 40km; SFP-1G53-BX40 | 40km; SFP-1G45-BX80 | 80km; SFP-1G54-BX80 | 80km; SFP-1G45-BX120 | 120km; SFP-1G54-BX120 | 120km; SFP-1G45-BX160 | 160km; SFP-1G45-BX160-I | 160km; SFP-1G54-BX160 | 160km; SFP-1G54-BX160-I | 160km

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FS SFP-1G35-BX20 Compatible LINK-PP 1G BiDi SFP Specifications

The FS SFP-1G35-BX20 Compatible LINK-PP module is a high-performance 1G BiDi SFP transceiver module delivering reliable 1.25 Gbps throughput over single-mode fiber. Engineered for 20km reach, this simplex LC optical module operates at commercial temperature, utilizing advanced FP laser and PIN receiver technology to ensure optimal efficiency and seamless enterprise network integration.

FS Part Number	SFP-1G35-BX20	Vendor Name	LINK-PP
Form Factor	SFP	Max Data Rate	1.25Gbps
Wavelength	1310nm-TX/1550nm-RX	Max Cable Distance	20km
Connector	Simplex LC	Media	SMF
Transmitter Type	FP	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: How is your supply chain? If we need to source 1,000 of these 1310nm/1550nm SFPs quarterly, what is the typical lead time? By D***n on 2025-11-21

A: Our supply chain is highly robust with massive local stock for standard standard-rate SKUs. For a quarterly run rate of 1,000 units, we can schedule regular deliveries with zero delays. Standard bulk orders typically have a fast turnaround time of just 4-7 business days to locations across North America and Europe. By admin on 2025-11-21
Q: How does the total cost of ownership (TCO) for these Link-PP simplex LC modules compare to original OEM optics? By M***r on 2025-11-10

A: Our 1G SFP BiDi transceivers offer ultimate cost-performance, typically saving IT departments 70-80% compared to OEM branded optics. They deliver the exact same 1.25Gbps performance, precise DOM monitoring, and 20km transmission distance, drastically reducing your network deployment and long-term maintenance TCO. By admin on 2025-11-10
Q: We are planning a massive campus fiber network upgrade. Do you offer any tiered discounts for ordering these optical transceivers in batches of 500+? By S***s on 2025-09-21

A: Yes, we provide aggressive volume pricing for enterprise batch deployments. While the retail price is already highly competitive, purchasing bulk quantities will unlock significant per-unit discounts. Please reach out to our B2B sales team with your exact project needs for a custom quote! By admin on 2025-09-21
Q: Will this 1G SFP BiDi module sync up properly in a mixed environment using Cisco core switches and HPE edge switches? By R***r on 2025-08-22

A: Absolutely! The LS-BL31551G-20C is 100% MSA compliant and extensively tested for multi-brand interoperability. It works flawlessly as a plug-and-play solution across Cisco, HPE, Juniper, Dell, and other major OEM equipment without any vendor lock-in issues. By admin on 2025-08-22

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S***n

United Kingdom

Verified Purchase

4 .0

2026-04-16

Box was slightly crushed upon arrival, but the 1G SFP BiDi module works perfectly.

98 Helpful vote Comments

J***e

Ireland

Verified Purchase

5 .0

2026-03-03

Bought a batch of Link-PP optical modules for our campus network upgrade. Zero failures.

96 Helpful vote Comments

M***h

Indonesia

Verified Purchase

5 .0

2026-02-06

Paired these 1310nm-TX modules with 1550nm-TX ones. Link came up instantly on Juniper.

165 Helpful vote Comments

J***n

United Arab Emirates

Verified Purchase

5 .0

2026-01-18

DOM readings are precise. Great Cisco compatible 1G SFP for batch deployment.

204 Helpful vote Comments

C***s

Germany

Verified Purchase

5 .0

2025-12-05

Outstanding MSA compliant transceiver for enterprise use.

63 Helpful vote Comments

J***n

United States

Verified Purchase

5 .0

2025-10-21

Excellent 20km transmission distance. Used it for a remote base station backhaul link.

35 Helpful vote Comments

J***t

Panama

Verified Purchase

5 .0

2025-10-16

We deployed these 1G SFP BiDi 20km modules across multiple outdoor cabinets for cell tower backhaul. Despite not being industrial grade, they run extremely cool within the 0-70°C spec. Highly impressed!

196 Helpful vote Comments

S***n

Italy

Verified Purchase

5 .0

2025-10-09

Installed these 1G BiDi SFPs in my home 10G NAS setup. Smooth connection!

200 Helpful vote Comments

S***l

France

Verified Purchase

5 .0

2025-05-19

Needed a reliable link between my core switch and home 10G NAS. This Gigabit Fibre Channel module handles the 1G management interface flawlessly. Zero packet drops over single-mode fiber runs!

119 Helpful vote Comments

D***n

Hong Kong

Verified Purchase

5 .0

2025-03-17

Top-notch 1.25Gbps performance. A very cost-effective simplex LC SMF optical transceiver module.

125 Helpful vote Comments

S***r

Hong Kong

Verified Purchase

5 .0

2025-03-11

Works perfectly in our campus fiber network.

162 Helpful vote Comments

D***r

Panama

Verified Purchase

5 .0

2025-03-09

No packet loss tested on Netgear and Dell multi-brand switches. Very satisfied!

138 Helpful vote Comments

B***n

Kenya

Verified Purchase

5 .0

2025-02-24

Perfect for our indoor server room deployment.

126 Helpful vote Comments

C***z

Czech Republic

Verified Purchase

5 .0

2025-02-02

Upgrading our data center with these 1.25G SMF optical modules significantly lowered our TCO. Optical spectrum tests show massive margin. Perfect for large-scale IT room batch deployments and stable routing.

106 Helpful vote Comments

J***s

Chile

Verified Purchase

5 .0

2024-10-11

No CRC errors on the fibre channel. ✨

33 Helpful vote Comments

M***n

United States

Verified Purchase

5 .0

2024-04-23

Excellent service.

42 Helpful vote Comments

N***e

United Arab Emirates

Verified Purchase

5 .0

2024-04-11

Easy to check out and always very Fast shipping with great prices.

53 Helpful vote Comments

T***g

United States

Verified Purchase

5 .0

2024-04-04

Vendor shipped on time and product arrived as advertised.

43 Helpful vote Comments

B***d

Malaysia

Verified Purchase

5 .0

2024-01-10

Quick, trusted company for networking needs. I have shopped with them for years! I will continue to buy from them!

46 Helpful vote Comments

N***z

Maldives

Verified Purchase

5 .0

2023-07-21

Fast shipping. No issues.

47 Helpful vote Comments

T***a

Belarus

Verified Purchase

5 .0

2023-07-17

Easy to navigate with a user friendly website. Everything works with utmost efficiency, making it a pleasure purchasing items here. I bought many third-party modules from here and they perform very well on my switches. Very reliable and trustworthy.

50 Helpful vote Comments

M***o

Indonesia

Verified Purchase

5 .0

2023-07-04

Shipping is always very Fast. My order was exactly as promised just like on previous orders. I have never had a need to contact customer service. Highly recommended vendor.

41 Helpful vote Comments

N***t

Netherlands

Verified Purchase

5 .0

2023-03-08

Website is easy to understand and simple to navigate.

49 Helpful vote Comments

F***l

France

Verified Purchase

5 .0