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.

Breadcrumb: Home; Products; Optics Transceivers | SFP Modules; 1/2/4G Transceiver Modules; 1G BiDi SFP; 214209

Click to open expanded view

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

Name: Cisco GLC-BX-20U Compatible LINK-PP 1G SFP BiDi 1310nm-TX/1550nm-RX 20km Simplex LC DOM SMF Optical Transceiver Module
Brand: LINK-PP
SKU: 214209
Price: 12.47 USD
Availability: InStock
Rating: 4.9 (25 reviews)

# 214209

Product: Cisco GLC-BX-20U Compatible LINK-PP 1G SFP BiDi 1310nm-TX/1550nm-RX 20km Simplex LC DOM SMF Optical Transceiver Module
SKU: 214209
P/N: LS-BL31551G-20C
Price: $ 14.5
Stock: 773 in Stock
Sold: 2.2K
Product URL: https://www.l-p.com/products/476200.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

25 Reviews

4 Questions

Request Stock

2.2K Sold

$ 14.5

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

Qty (pcs) :

Unit Price :

$ 14.5

100

$ 13.775

1000

$ 13.34

3000

$ 12.905

6000

$ 12.47

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:: GLC-BX-10D | 10km; GLC-BX-10U | 10km; GLC-BX-D | 10km; GLC-BX-U | 10km; GLC-BX-20D | 20km; GLC-BX-20U | 20km; MGBBX1 | 20km; MGBBX1D | 20km; GLC-BX40-D-I | 40km; GLC-BX40-DA | 40km; GLC-BX40-DA-I | 40km; GLC-BX40-U | 40km; GLC-BX40-UA | 40km; GLC-BX80-DA-I | 80km; GLC-BX80-UA | 80km; GLC-BX120-D | 120km; GLC-BX120-U | 120km; SFP-1G45-BX160 | 160km; SFP-1G45-BX160-I | 160km; SFP-1G54-BX160 | 160km; SFP-1G54-BX160-I | 160km

Shipping:

To Be Negotiated

Free Shipping

Can't deliver

to United States via {{now_chooseship?now_chooseship.name:''}}

Estimated delivery time : {{now_chooseship?now_chooseship.datemin:''}}-{{now_chooseship?now_chooseship.datemax:''}} days. See details

5-Year Warranty 30-Day Returns 30-Day Exchange

Stock:

{{parseInt(detail_data.left_num) ? detail_data.left_num +' in Stock' :detail_data.zeroStockOrder==0?'Out of Stock':'Available'}} .

Quantity:

( Min. Order {{detail_data.prodInfo.minimum_ordered_quantity}} )

undeliverable

Total Price:

{{ detail_data.displayed_price.unit_prefix }} {{ detail_data.displayed_price.original_total_price }} ( {{ detail_data.displayed_price.rate_of_discount }}% OFF ) {{detail_data.displayed_price.ex_sell_type}}

Add to wish

Specifications

Specification
Videos
Matching Products
Download
Q&A
Customer Reviews

Cisco GLC-BX-20U Compatible LINK-PP 1G BiDi SFP Specifications

The Cisco GLC-BX-20U 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.

Cisco Part Number	GLC-BX-20U	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

Videos

Matching Products

Pictures

ID#

Description

Price

Stock

Add to Cart

Download

Product Drawing

PDF
LS-BL31551G-20C.pdf

Questions & Answers
Ask a Question

No data

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

Customer Reviews
Write a Review

{{stardata.star}}

{{comment.count}} reviews
5 Stars

{{comment.star5}}%

4 Stars

{{comment.star4}}%

3 Stars

{{comment.star3}}%

2 Stars

{{comment.star2}}%

1 Star

{{comment.star1}}%

All Reviews ({{comment.star_num?comment.star_num:comment.count}})

All Reviews

5 stars only

4 stars only

3 stars only

2 stars only

1 star only
Reviews with Pictures ( {{comment.pic_comment}} )
See All Reviews

No data

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

W***e

South Africa

Verified Purchase

5 .0

2026-03-14

Cheap and reliable Simplex LC transceivers!

170 Helpful vote Comments

K***n

Italy

Verified Purchase

5 .0

2026-02-07

DOM features read accurately on my Mikrotik.

200 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***l

Brazil

Verified Purchase

4 .0

2025-11-08

Shipping took a day longer, but Link-PP simplex LC modules perform flawlessly!

182 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

D***z

Belgium

Verified Purchase

5 .0

2025-08-10

Flawless 1310nm-TX performance for our core switch.

149 Helpful vote Comments

D***n

Dominican Republic

Verified Purchase

5 .0

2025-07-17

The 0 to 70°C temp range is perfectly stable for our indoor telecom cabinets.

155 Helpful vote Comments

J***k

Canada

Verified Purchase

5 .0

2025-05-06

Cisco compatible 1G BiDi synced up instantly. ⚡

154 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

R***e

Czech Republic

Verified Purchase

5 .0

2025-03-05

Great management link for home 10G NAS.

210 Helpful vote Comments

J***s

Netherlands

Verified Purchase

5 .0

2024-12-25

Solid 20km SMF optical module, highly recommended!

132 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

M***l

Italy

Verified Purchase

5 .0

2024-02-05

Site is easy to use. Have used previously, but had to register again. Not sure why. Price is best of many.

21 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

D***n

Canada

Verified Purchase

5 .0

2023-10-07

Super quick and efficient shipping - even to Australia.

16 Helpful vote Comments

T***i

Turkey

Verified Purchase

5 .0

2023-09-27

Really happy with my purchase. This is the first time that i purchase Transceiver Modules online. The product was send really Fast. I will continue purchase with your.

44 Helpful vote Comments

N***z

Maldives

Verified Purchase

5 .0

2023-07-21

Fast shipping. No issues.

47 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

I***o

Mexico

Verified Purchase

5 .0