Does this transceiver comply with standard telecom protocols for our ISP backbone? We run mostly SDH STM-16 and legacy SONET.

Yes, it is heavily engineered for telecommunications. It is fully compliant with SDH STM-16, SONET, Fast Ethernet, and Gigabit Fibre Channel standards. It also strictly adheres to SFF-8472 for digital optical monitoring (DOM), ensuring seamless compliance for rigorous ISP and data center interconnects.

How does the performance of this transceiver compare to the original branded optics? We are on a tight budget but can't sacrifice network reliability.

It delivers identical 2.5Gbps throughput and stable 80km reach at a fraction of the cost. Using the exact same high-quality DFB laser and PIN receiver layout, it meets all rigorous OEM tolerances for TX/RX power and signal latency, making it an incredibly cost-effective, plug-and-play replacement.

Just to verify the physical connection, this module requires a single strand of fiber, right? What type of patch cable do I need for the interface?

That is correct! Because this is a BiDi (bidirectional) WDM module, it utilizes just one single strand of Single Mode Fiber (SMF) for both transmitting (1550nm) and receiving (1490nm). You will need a standard Simplex LC patch cable to click directly into this transceiver.

We have a mix of Cisco and Arista switches in our core. Will this LINK-PP 2.5G bidi module play nice without throwing unsupported transceiver errors?

Absolutely. The LS-BL55492G-80C is fully MSA compliant and can be coded to match standard OEM specifications. It will seamlessly interoperate with your Cisco and Arista network gear without triggering any unsupported third-party optic warnings.

This unit shows an operating temperature of 0 to 70°C. We need something for an outdoor telecom enclosure in the desert. Do you have an industrial-grade version of this exact spec?

We certainly do. For extreme outdoor or unconditioned edge environments, you'll want to check out our LS-BL55492G-80I model. It offers the exact same 2.5G 80km WDM performance but is built to support a much wider industrial temperature range from -40°C all the way up to 85°C.

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LINK-PP LS-BL55492G-80C 2.5G SFP BiDi 1550nm-TX/1490nm-RX 80km DOM Simplex LC SMF Optical Transceiver Module

Name: LINK-PP LS-BL55492G-80C 2.5G SFP BiDi 1550nm-TX/1490nm-RX 80km DOM Simplex LC SMF Optical Transceiver Module
Brand: LINK-PP
SKU: 197930
Price: 68.8 USD
Availability: InStock
Rating: 4.9 (54 reviews)

# 197930

Product: LINK-PP LS-BL55492G-80C 2.5G SFP BiDi 1550nm-TX/1490nm-RX 80km DOM Simplex LC SMF Optical Transceiver Module
SKU: 197930
P/N: LS-BL55492G-80C
Price: $ 80
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Product URL: https://www.l-p.com/products/488464.htm

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LINK-PP LS-BL55492G-80C 2.5G BiDi SFP Specifications

The LINK-PP LS-BL55492G-80C is a high-performance 2.5G BiDi SFP optical transceiver engineered for robust SDH and SONET networks. This hot-pluggable component utilizes a single mode fiber connection, integrating an advanced DFB laser with a PIN photodetector. Operating optimally within commercial temperature ranges, it delivers cost-effective, reliable single-fiber bidirectional data transmission for modern enterprise infrastructure.

LINK-PP Part Number	LS-BL55492G-80C	Vendor Name	LINK-PP
Form Factor	SFP	Max Data Rate	2.5Gbps
Wavelength	1550nm-TX/1490nm-RX	Max Cable Distance	80km
Connector	Simplex LC	Media	SMF
Transmitter Type	DFB	Receiver Type	PIN
TX Power	-2 to +4dBm	RX Power	-23 to -1dBm
Receiver Sensitivity	-26dBm	DOM Support	Yes
Operating Temperature Range	0 to 70°C	Protocols	Fast Ethernet, Gigabit Fibre Channel, MSA Compliant

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Q: Does this transceiver comply with standard telecom protocols for our ISP backbone? We run mostly SDH STM-16 and legacy SONET. By C***s on 2026-07-13

A: Yes, it is heavily engineered for telecommunications. It is fully compliant with SDH STM-16, SONET, Fast Ethernet, and Gigabit Fibre Channel standards. It also strictly adheres to SFF-8472 for digital optical monitoring (DOM), ensuring seamless compliance for rigorous ISP and data center interconnects. By admin on 2026-07-13
Q: How does the performance of this transceiver compare to the original branded optics? We are on a tight budget but can't sacrifice network reliability. By D***s on 2026-06-22

A: It delivers identical 2.5Gbps throughput and stable 80km reach at a fraction of the cost. Using the exact same high-quality DFB laser and PIN receiver layout, it meets all rigorous OEM tolerances for TX/RX power and signal latency, making it an incredibly cost-effective, plug-and-play replacement. By admin on 2026-06-22
Q: Just to verify the physical connection, this module requires a single strand of fiber, right? What type of patch cable do I need for the interface? By A***s on 2026-03-13

A: That is correct! Because this is a BiDi (bidirectional) WDM module, it utilizes just one single strand of Single Mode Fiber (SMF) for both transmitting (1550nm) and receiving (1490nm). You will need a standard Simplex LC patch cable to click directly into this transceiver. By admin on 2026-03-13
Q: We have a mix of Cisco and Arista switches in our core. Will this LINK-PP 2.5G bidi module play nice without throwing unsupported transceiver errors? By D***s on 2026-02-10

A: Absolutely. The LS-BL55492G-80C is fully MSA compliant and can be coded to match standard OEM specifications. It will seamlessly interoperate with your Cisco and Arista network gear without triggering any unsupported third-party optic warnings. By admin on 2026-02-10
Q: This unit shows an operating temperature of 0 to 70°C. We need something for an outdoor telecom enclosure in the desert. Do you have an industrial-grade version of this exact spec? By W***r on 2026-01-12

A: We certainly do. For extreme outdoor or unconditioned edge environments, you'll want to check out our LS-BL55492G-80I model. It offers the exact same 2.5G 80km WDM performance but is built to support a much wider industrial temperature range from -40°C all the way up to 85°C. By admin on 2026-01-12

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E***e

Panama

Verified Purchase

5 .0

2026-07-25

Fast Ethernet and SDH compatibility makes this a versatile module for our ISP upgrades.

217 Helpful vote Comments

T***s

Colombia

Verified Purchase

5 .0

2026-07-04

1550nm/1490nm WDM works great on single strand. ⚡

83 Helpful vote Comments

M***s

Argentina

Verified Purchase

5 .0

2026-06-25

Plumbed right in, zero CRC errors!

63 Helpful vote Comments

E***s

Poland

Verified Purchase

5 .0

2026-06-18

The DDM data is super accurate, makes remote troubleshooting so much easier for us.

66 Helpful vote Comments

C***n

India

Verified Purchase

5 .0

2026-06-04

Perfect DOM monitoring for our campus fiber.

212 Helpful vote Comments

E***t

Ukraine

Verified Purchase

4 .0

2026-04-23

Box was slightly dented, but simplex LC modules are intact and link up perfectly.

10 Helpful vote Comments

J***n

Russian Federation

Verified Purchase

5 .0

2026-04-05

We manage multiple cell tower backhauls and needed a reliable 1550nm-TX/1490nm-RX WDM solution. These 2.5G SFP transceivers handled the temperature swings in our unconditioned edge cabinets surprisingly well. Definitely our new go-to OEM alternative.

154 Helpful vote Comments

S***n

Belgium

Verified Purchase

5 .0

2026-03-05

Simplex LC connector fits snug, no issues.

131 Helpful vote Comments

L***n

Colombia

Verified Purchase

5 .0

2026-03-01

Unbeatable price for 80km 2.5G optics. Compatible with our entire Juniper network stack.

189 Helpful vote Comments

L***r

Norway

Verified Purchase

5 .0

2026-02-20

Reliable STM-16 transceiver for legacy SONET gear. ⏱️

120 Helpful vote Comments

J***r

Denmark

Verified Purchase

5 .0

2026-02-15

Works straight out of the box for Gigabit Fibre Channel without any OEM warnings.

58 Helpful vote Comments

D***s

Germany

Verified Purchase

5 .0

2026-02-04

Solid 2.5Gbps link over 50km SMF run!

210 Helpful vote Comments

R***s

Poland

Verified Purchase

5 .0

2026-01-04

Single mode fiber bidi saves us huge cabling costs on outdoor cabinet deployments.

93 Helpful vote Comments

M***l

Spain

Verified Purchase

5 .0

2026-01-01

Upgrading our hospital campus from 1G to 2.5G using existing single strand fiber. The simplex LC interface mated perfectly. DOM monitoring integrates beautifully with our SNMP server, giving us real-time voltage and temp metrics.

60 Helpful vote Comments

N***z

Dominican Republic

Verified Purchase

5 .0

2025-12-23

Tested this LINK-PP 80km optical transceiver on our EX switch. TX power stays around +1dBm, RX hits -18dBm over 60km SMF. Zero packet drop during the 72-hour burn-in. Solid hardware! ⚙️

66 Helpful vote Comments

M***n

India

Verified Purchase

5 .0

2025-12-02

We deployed 50 units for FTTH backhaul. Flawless 2.5Gbps throughput at 0-70°C.

168 Helpful vote Comments

C***s

Dominican Republic

Verified Purchase

5 .0

2025-11-16

DFB laser output is exactly as spec'd.

44 Helpful vote Comments

D***n

Portugal

Verified Purchase

4 .0

2025-10-24

Delivery took an extra day, but the 2.5G bidi SFP works flawlessly.

8 Helpful vote Comments

D***n

Tunisia

Verified Purchase

5 .0

2025-10-16

Using these 80km SFP modules for a metro data center interconnect. Very stable!

75 Helpful vote Comments

W***e

Costa Rica

Verified Purchase

5 .0

2025-09-29

Fired up instantly in our Cisco switch.

185 Helpful vote Comments

M***t

Indonesia

Verified Purchase

5 .0

2025-09-25

Excellent long-haul optics for the price.

29 Helpful vote Comments

C***r

Thailand

Verified Purchase

5 .0

2025-09-02

Stable 2.5G connection for my custom NAS.

58 Helpful vote Comments

L***e

Denmark

Verified Purchase

5 .0

2025-08-23

Great 2.5G SFP bidi for rural backhaul.

98 Helpful vote Comments

L***z

Norway

Verified Purchase

5 .0

2025-08-08

Benchmarked the LS-BL55492G-80C against standard branded optics. Latency and optical power are identical, but at a fraction of the cost. The DFB laser handles heavy enterprise routing traffic seamlessly over our 55km underground dark fiber.

207 Helpful vote Comments

D***t

Indonesia

Verified Purchase

5 .0

2025-06-04

Pushed it to 75km and the PIN receiver sensitivity holds up perfectly.

162 Helpful vote Comments

M***n

Italy

Verified Purchase

5 .0

2025-05-30

Overall, not a bad experience, but they need to have better communication regarding order processing and shipping, especially if the item is on back order.

38 Helpful vote Comments

y***l

United States

Verified Purchase

5 .0

2025-04-19

Will absolutely purchase from you soon. Pretty good.

42 Helpful vote Comments

A***u

United States

Verified Purchase

5 .0

2025-03-10

Quick and easy ordering process..best price i found online for this item!

21 Helpful vote Comments

S***l

Ukraine

Verified Purchase

5 .0

2025-02-05

Brilliant and easy way to select the most suitable Transceiver Modules for my Switches.

20 Helpful vote Comments

T***f

Malaysia

Verified Purchase

5 .0

2024-11-20

Easier than going to the store, guaranteed service and product delivery. Pleasure to work with on any transaction level.

55 Helpful vote Comments

K***g

India

Verified Purchase

4 .0

2024-11-16

This 100G QSFP28 Transceiver Module was purchased under the recommendation of a friend, and it has been running very well so far. Looking forward to future cooperation.

79 Helpful vote Comments

M***o

Hungary

Verified Purchase

5 .0

2024-10-19

Very nice people to work with. Walk me through the process to help me finish the purchase. I was very happy with the 10/25/40G Transceiver Modules I received.

11 Helpful vote Comments

M***a

India

Verified Purchase

5 .0

2024-10-10

Thank you for the great products and support.

48 Helpful vote Comments

P***n

Finland

Verified Purchase

5 .0