We run legacy SDH/SONET STM-1 telecom circuits. Can this transceiver handle that protocol?

Yes, this module is specifically engineered to support SDH/SONET STM-1 (155Mbps) protocols alongside standard Fast Ethernet.

I have standard duplex LC fiber patch cords in my server room. Can I plug them into this module?

No, this module uses a Simplex LC port. You will need a single-strand simplex LC patch cable to connect it.

Our roadside traffic control cabinets experience freezing winters (-30°C) and hot summers (+70°C). Can this module survive?

Absolutely. This is a true industrial-grade module designed and rated to operate reliably in extreme temperatures ranging from -40°C to +85°C.

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LINK-PP LS-BL495501-80I 155M SFP BiDi 1490nm-TX/1550nm-RX 80km Simplex LC DDM SMF Optical Transceiver Module (Industrial)

Name: LINK-PP LS-BL495501-80I 155M SFP BiDi 1490nm-TX/1550nm-RX 80km Simplex LC DDM SMF Optical Transceiver Module (Industrial)
Brand: LINK-PP
SKU: 205655
Price: 9.46 USD
Availability: InStock
Rating: 4.9 (27 reviews)

# 205655

Product: LINK-PP LS-BL495501-80I 155M SFP BiDi 1490nm-TX/1550nm-RX 80km Simplex LC DDM SMF Optical Transceiver Module (Industrial)
SKU: 205655
P/N: LS-BL495501-80I
Price: $ 11
Stock: 330 in Stock
Sold: 1.7K
Product URL: https://www.l-p.com/products/494038.htm

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Manufacture: LINK-PP

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Compatible:: LINK-PP

Compatible P/N:: LS-BL315501-10C | 10km; LS-BL315501-10I | 10km; LS-BL553101-10C | 10km; LS-BL553101-10I | 10km; LS-BL315501-15C | 15km; LS-BL553101-15C | 15km; LS-BL315501-20C | 20km; LS-BL315501-20I | 20km; LS-BL553101-20C | 20km; LS-BL553101-20I | 20km; LS-BL315501-40C | 40km; LS-BL315501-40I | 40km; LS-BL553101-40C | 40km; LS-BL553101-40I | 40km; LS-BL315501-80C | 80km; LS-BL315501-80I | 80km; LS-BL495501-80C | 80km; LS-BL495501-80I | 80km; LS-BL553101-80C | 80km; LS-BL553101-80I | 80km; LS-BL554901-80C | 80km; LS-BL554901-80I | 80km

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LINK-PP LS-BL495501-80I 155M SFP Specifications

LS-BL495501-80I operates as an industrial-grade 155M BiDi SFP optical transceiver that utilizes a simplex LC interface and 1490nm-TX/1550nm-RX wavelengths to bridge 80km spans, complete with real-time digital diagnostic monitoring for flawless execution from -40°C to +85°C.

LINK-PP Part Number	LS-BL495501-80I	Vendor Name	LINK-PP
Form Factor	SFP	Max Data Rate	155Mbps
Wavelength	1490nm-TX/1550nm-RX	Max Cable Distance	80km
Connector	Simplex LC	Media	SMF
Transmitter Type	DFB	Receiver Type	PIN
TX Power	-5 to +2dBm	RX Power	-32 to -6dBm
Receiver Sensitivity	-32dBm	DOM Support	Yes
Operating Temperature Range	-40 to 85°C	Protocols	Fast Ethernet, Gigabit Fibre Channel, MSA Compliant

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Q: We run legacy SDH/SONET STM-1 telecom circuits. Can this transceiver handle that protocol? By G***e on 2026-03-05

A: Yes, this module is specifically engineered to support SDH/SONET STM-1 (155Mbps) protocols alongside standard Fast Ethernet. By admin on 2026-03-06
Q: I have standard duplex LC fiber patch cords in my server room. Can I plug them into this module? By E***r on 2025-08-19

A: No, this module uses a Simplex LC port. You will need a single-strand simplex LC patch cable to connect it. By admin on 2025-08-20
Q: Our roadside traffic control cabinets experience freezing winters (-30°C) and hot summers (+70°C). Can this module survive? By F***k on 2025-01-28

A: Absolutely. This is a true industrial-grade module designed and rated to operate reliably in extreme temperatures ranging from -40°C to +85°C. By admin on 2025-01-29

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A***s

Finland

Verified Purchase

5 .0

2026-05-11

We deploy these in harsh outdoor substations where temperatures fluctuate wildly. The industrial-grade rating (-40°C to 85°C) is exactly what we needed. They have been running continuously for one month now with zero flappings. The metal housing feels premium and dissipates heat well.

119 Helpful vote Comments

C***g

Germany

Verified Purchase

5 .0

2026-04-23

Ran real-time DDM diagnostics and both Tx/Rx optical power levels are extremely stable. (•‿•)

114 Helpful vote Comments

M***r

Israel

Verified Purchase

5 .0

2026-04-02

We operate an inter-island telemetry network utilizing subsea single-mode fiber cables, and our longest segment is exactly 67.4km. Because of the cable age and several subsea splices, our total path attenuation is close to 28dB, but this module handled it flawlessly. Its high-sensitivity APD receiver successfully pulled in the 1550nm RX signal, maintaining an optical signal-to-noise ratio that kept our bit error rate at zero. The Tx power from the 1490nm laser was consistently measured at +1.0dBm. For long-distance, high-loss environments, having an 80km optical budget on a 155M SFP is absolutely crucial.

138 Helpful vote Comments

A***l

Hungary

Verified Purchase

5 .0

2026-03-31

Standard 155M Fast Ethernet SFP, but built like a tank. DDM functions are fully implemented—can read temperature, voltage, and bias current directly from our GUI. This makes remote troubleshooting incredibly easy. Highly satisfied with LINK-PP's quality control.

96 Helpful vote Comments

E***l

Romania

Verified Purchase

5 .0

2026-03-09

DDM reading is spot on, simplex LC fiber saved us half the cabling costs. Cheap & perfect!

68 Helpful vote Comments

P***r

Malaysia

Verified Purchase

5 .0

2026-02-25

Perfect for smart grid fiber optic deployments. The simplex LC single-mode fiber interface is highly efficient. Operating smoothly at 155M speeds over our 70km distribution network. No packet loss, low latency, and robust industrial temperature range.

106 Helpful vote Comments

E***l

Bangladesh

Verified Purchase

5 .0

2026-02-02

Specs match perfectly: 1490nm-TX/1550nm-RX on a single SMF strand. Excellent Tx power!

74 Helpful vote Comments

M***z

France

Verified Purchase

5 .0

2026-01-22

Using these 155M BiDi SFP modules for an SDH/SONET STM-1 transport link. Working flawlessly with our legacy gear. The 80km reach is stable and we see no bit errors (BER) on our test equipment. Very reliable hardware for critical infrastructure.

83 Helpful vote Comments

K***s

Germany

Verified Purchase

4 .0

2026-01-13

The 155M BiDi SFP transceivers perform exceptionally well in our outdoor cabinets, handling temperature swings perfectly. Unfortunately, the customs clearance process took longer than expected at the German border, requiring us to submit additional tax documentation. The product is top-tier, but international buyers should plan for customs buffer time.

23 Helpful vote Comments

L***s

Canada

Verified Purchase

5 .0

2025-12-17

I manage the fiber-optic telemetry network along a remote freight rail corridor where we experience extreme seasonal shifts. We standardise on industrial-grade optics transceivers, and this module has become our preferred 155M BiDi SFP. We performed extensive testing in our environmental chamber, cycling the transceiver from -45°C to +85°C while monitoring optical power. The wavelength stability of the 1490nm DFB laser was phenomenal, showing absolutely no spectral drift or signal degradation. On the live trackside network, the simplex LC SMF connection has been completely immune to high EMI.

141 Helpful vote Comments

G***n

Sweden

Verified Purchase

5 .0

2025-12-11

We have these installed in roadside cabinets across Sweden. Winter temperatures drop to -30°C here, but these industrial-grade modules don't blink. DDM shows temperature stability and the optical transceiver power doesn't drift. Excellent build quality for rugged environments.

106 Helpful vote Comments

S***n

United States

Verified Purchase

5 .0

2025-12-03

Needed some cheap but reliable 155M SFP BiDi 80km modules for an older Fast Ethernet legacy link. These LINK-PP modules worked perfectly with our routers. Just plugged them in, no CLI overrides needed. Optical budget is well within specs. Will definitely buy again.

98 Helpful vote Comments

T***r

Canada

Verified Purchase

5 .0

2025-11-21

Industrial grade is real, our outdoor cabinet survived a freezing -20°C night with zero packet loss.

42 Helpful vote Comments

D***z

Denmark

Verified Purchase

5 .0

2025-10-18

Excellent industrial wide-temp performance in our uncooled remote utility node.

57 Helpful vote Comments

A***l

Mexico

Verified Purchase

5 .0

2025-09-29

In our regional telecommunications network, fiber optimization is key to reducing operational lease costs. We transitioned several older dual-fiber 155M Fast Ethernet circuits to single-fiber Simplex LC using these BiDi SFP transceivers. We paired the 1490TX/1550RX module with its complementary partner, and our edge equipment recognized them instantly without throwing any errors. The DOM/DDM values matched our benchtop optical power meter readings within ±0.2dB, which is impressive. Having an 80km reach over single-mode fiber with such stable Tx/Rx performance allows us to reclaim half of our dark fiber infrastructure.

137 Helpful vote Comments

C***n

Belarus

Verified Purchase

5 .0

2025-09-14

Awesome 155M SFP BiDi modules, running a 72km municipal link like an absolute champ!

87 Helpful vote Comments

Z***t

India

Verified Purchase

4 .0

2025-07-26

The 1490nm-TX/1550nm-RX BiDi performance is great, and the simplex LC setup saved us half our cabling costs on a 75km link. The only hitch was that my tracking number didn't show any updates for the first 36 hours after shipping, which made me nervous. Once it updated, the shipping was fast and the modules worked beautifully.

31 Helpful vote Comments

M***t

Spain

Verified Purchase

5 .0

2025-07-19

We bought a batch of these LS-BL495501-80I transceivers for our long-backhaul links. Running them on single-mode fiber (SMF) over a 65km span. The 1490nm-TX and 1550nm-RX BiDi technology works perfectly, saving us precious dark fiber strands. DDM metrics show excellent RX sensitivity. Highly recommend for regional network upgrades!

122 Helpful vote Comments

S***s

Indonesia

Verified Purchase

5 .0

2025-07-02

We use these for our railway signaling network backhauls. The industrial temperature tolerance is mandatory for our outdoor trackside enclosures. These optical transceivers have survived a brutal summer heatwave with zero issues. Rock-solid hardware.

141 Helpful vote Comments

S***z

Netherlands

Verified Purchase

5 .0

2025-06-04

Had a custom utility project requiring 1490nm/1550nm BiDi SFP modules over an old 75km single-mode fiber run. Put these in, and they linked up immediately. Signal attenuation was high due to old splices, but the 80km laser punched right through. Outstanding TX margin!

89 Helpful vote Comments

A***g

Poland

Verified Purchase

5 .0

2025-05-27

Simplex LC single-mode is the way to go for long-haul FTTH backhauls. Zero hassle setting up.

93 Helpful vote Comments

J***s

Maldives

Verified Purchase

5 .0

2025-05-13

We deployed these SFP modules for a public safety communication loop in Oregon on a fiber run that is 69.1km long. Using our optical spectrum analyzer, we verified the spectral purity of the 1490nm-TX DFB laser—the side-mode suppression ratio was outstanding, preventing chromatic dispersion issues. The 1550nm APD receiver successfully decoded the weak incoming signal with zero frame loss. DDM diagnostics showed a stable internal voltage of 3.3V and operating temperatures well within safe thresholds inside our outdoor pole-mounted enclosures. These modules are incredibly well-engineered.

107 Helpful vote Comments

E***r

Nepal

Verified Purchase

5 .0

2025-04-05

Our engineering firm was skeptical about third-party transceivers for a highway monitoring network, but LINK-PP did not disappoint. These 1490nm-TX/1550nm-RX modules integrated flawlessly with our Hirschmann industrial switches. No lag, no packet drops, and saved us thousands compared to OEM optics.

105 Helpful vote Comments

D***r

Norway

Verified Purchase

5 .0

2025-03-28

Perfect match for our metro-Ethernet rings. We paired this LS-BL495501-80I with its matching 1550nm-TX/1490nm-RX counterpart. Instant link up. The simplex LC interface is very clean and the latching mechanism is durable. Will buy more for upcoming site rollouts.

71 Helpful vote Comments

E***t

Philippines

Verified Purchase

5 .0

2025-02-24

Zero frame drops even during peak evening traffic. Fully satisfied with these 155M SFP BiDi optics.

91 Helpful vote Comments

K***s

United States

Verified Purchase

4 .0

2025-02-16

The LS-BL495501-80I optical transceivers themselves are absolutely flawless. Plugged them into our switches, and the 155M simplex LC link came up instantly with accurate DDM readings. However, the carrier delayed the delivery to London by 3 days, which slightly pushed back our installation schedule. Performance is definitely 5 stars, but giving 4 stars due to the shipping lag.

28 Helpful vote Comments

V***s

Ireland

Verified Purchase

5 .0

2025-01-27

We recently upgraded our municipal smart grid infrastructure, requiring optical backhauls over an 80km span. We deployed these transceivers across various unconditioned outdoor utility cabinets where temperatures fluctuate wildly. Using an OTDR and optical power meter, we measured the launch power at a steady +1.5 dBm, and the receiver sensitivity held firm at -32 dBm. Over a 72-hour stress test with a packet generator, we recorded exactly 0% packet loss and sub-millisecond latency. The built-in DDM integrated seamlessly into our SNMP monitoring suite, allowing us to track real-time transceiver temperature and bias current perfectly.

112 Helpful vote Comments