Does the BiDi technology mean I only need one of these modules to build a working link?

BiDi requires a complementary pair. You need this 1490nm-TX/1550nm-RX unit on one end and its matching 1550nm-TX/1490nm-RX counterpart on the other.

Can we use this transceiver on our legacy STM-1/OC-3 SDH voice transport networks?

Yes, this module is fully compatible with standard 155Mbps legacy optical transport lines and handles voice circuit data streams flawlessly.

How accurately does the internal DDM sensor track temperature spikes inside a high-density server rack?

The internal digital diagnostics monitor reads the internal laser temperature in real-time, accurate within a tight +/- 3°C margin.

Can we run this single-mode module over a short 500-meter multi-mode fiber run inside our central office?

No, this transceiver relies on a 1490/1550nm laser designed strictly for single-mode fiber (SMF) and will fail to link up over multi-mode core diameters.

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LINK-PP LS-BL495501-80C 155M SFP BiDi 1490nm-TX/1550nm-RX 80km Simplex LC DOM SMF Optical Transceiver Module

Name: LINK-PP LS-BL495501-80C 155M SFP BiDi 1490nm-TX/1550nm-RX 80km Simplex LC DOM SMF Optical Transceiver Module
Brand: LINK-PP
SKU: 205654
Price: 8.6 USD
Availability: InStock
Rating: 4.9 (16 reviews)

# 205654

Product: LINK-PP LS-BL495501-80C 155M SFP BiDi 1490nm-TX/1550nm-RX 80km Simplex LC DOM SMF Optical Transceiver Module
SKU: 205654
P/N: LS-BL495501-80C
Price: $ 10
Stock: 520 in Stock
Sold: 2.5K
Product URL: https://www.l-p.com/products/494037.htm

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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-BL495501-80C 155M SFP Specifications

LS-BL495501-80C functions as an advanced 155M SFP BiDi optical transceiver module delivering a robust 80km data span over a simplex LC interface, featuring a 1490nm-TX/1550nm-RX wavelength configuration, a 0 to +70°C operational thermal range, and live-telemetry Digital Optical Monitoring.

LINK-PP Part Number	LS-BL495501-80C	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	0 to 70°C	Protocols	Fast Ethernet, Gigabit Fibre Channel, MSA Compliant

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Q: Does the BiDi technology mean I only need one of these modules to build a working link? By D***m on 2026-04-15

A: BiDi requires a complementary pair. You need this 1490nm-TX/1550nm-RX unit on one end and its matching 1550nm-TX/1490nm-RX counterpart on the other. By admin on 2026-04-16
Q: Can we use this transceiver on our legacy STM-1/OC-3 SDH voice transport networks? By B***h on 2026-02-08

A: Yes, this module is fully compatible with standard 155Mbps legacy optical transport lines and handles voice circuit data streams flawlessly. By admin on 2026-02-09
Q: How accurately does the internal DDM sensor track temperature spikes inside a high-density server rack? By A***r on 2025-11-06

A: The internal digital diagnostics monitor reads the internal laser temperature in real-time, accurate within a tight +/- 3°C margin. By admin on 2025-11-07
Q: Can we run this single-mode module over a short 500-meter multi-mode fiber run inside our central office? By C***r on 2025-03-24

A: No, this transceiver relies on a 1490/1550nm laser designed strictly for single-mode fiber (SMF) and will fail to link up over multi-mode core diameters. By admin on 2025-03-25

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R***n

Brunei Darussalam

Verified Purchase

5 .0

2026-05-04

We deployed this commercial-grade transceiver pair to bridge a high-availability backup network over a 68km dark fiber route with multiple legacy fusion splices. Since these are rated for 80km, we closely monitored the receiver to ensure the strong signal didn't oversaturate the optics, but the dynamic range proved excellent and required no inline attenuators. The DOM telemetry reports real-time laser bias, temperature, and RX power levels with virtually zero drift, making this an incredibly reliable and budget-friendly choice for long-span enterprise WAN links.

103 Helpful vote Comments

D***s

Australia

Verified Purchase

5 .0

2026-04-11

Our legacy transport equipment needed 155M STM-1 spares and the original vendor quotes were crazy. These compatible modules arrived quickly, auto-negotiated immediately, and have been running cool with zero CRC errors.

89 Helpful vote Comments

E***s

New Zealand

Verified Purchase

5 .0

2026-03-22

Halved our fiber leasing costs instantly using these 1490/1550nm simplex modules. Outstanding value!

62 Helpful vote Comments

M***e

Thailand

Verified Purchase

5 .0

2026-02-17

Our older 40km optics were struggling at their physical limit, causing intermittent packet loss. Swapping them for these 80km SFP modules fixed the issue instantly. Our connection is now completely stable and latency is flat.

48 Helpful vote Comments

O***r

South Africa

Verified Purchase

5 .0

2026-01-29

Monitoring optical power in real-time via SNMP. Temperature and TX/RX values are spot on!

54 Helpful vote Comments

H***e

Russian Federation

Verified Purchase

4 .0

2026-01-07

Superb wholesale pricing on these 80km BiDi transceivers compared to local European distributors. We are using them for a municipal SCADA setup. However, the international package was held up at the border customs office for 3 days for standard clearance documentation verification. Keep potential customs delays in mind for urgent projects.

31 Helpful vote Comments

S***n

Ukraine

Verified Purchase

5 .0

2025-12-25

Tested these modules on a 65km single-mode fiber spool before rack mounting. The real-time DOM telemetry is incredibly accurate, matching our handheld power meter within 0.2dBm. Highly reliable budget-saver for our telecom closet.

93 Helpful vote Comments

J***n

Brazil

Verified Purchase

4 .0

2025-11-28

The 80km transceivers themselves are top-tier. Built well, DOM is highly accurate, and they synced up immediately with our core switches. However, the local courier delayed our delivery by 3 days, which pushed back our scheduled maintenance window. Product is fantastic, but domestic transit could be faster.

28 Helpful vote Comments

J***h

United Arab Emirates

Verified Purchase

5 .0

2025-11-14

Using this 155M BiDi SFP on an old STM-1 legacy line over 72km of dark fiber, DOM shows excellent optical budget left!

51 Helpful vote Comments

R***n

Belgium

Verified Purchase

5 .0

2025-10-06

We needed to expand some legacy optical nodes at 155M. These came pre-coded to our specifications, fit perfectly, and report precise RX levels over our 74km link. A solid carrier-grade alternative.

62 Helpful vote Comments

C***s

Singapore

Verified Purchase

5 .0

2025-08-30

Our telecommunication infrastructure heavily relies on STM-1/OC-3 (155.52 Mbps) SDH transport rings for legacy voice circuits, making reliable 80km BiDi SFP optics highly critical. LINK-PP customized the coding for our specific deployment, and our multi-vendor aggregation switches accepted the modules instantly without throwing any CLI port warnings. In-built DDM diagnostics worked seamlessly with our central NMS, and after two months of continuous operation, our bit-error-rate (BERT) tester reports zero errors, proving the outstanding stability of the 1490/1550nm wavelength separation.

94 Helpful vote Comments

M***s

Austria

Verified Purchase

5 .0

2025-07-03

Perfect for our rural fiber expansion. These long-haul 80km transceivers slotted right into our distribution switches and synced at Fast Ethernet speeds without a single hiccup. Excellent duplex-to-simplex upgrade that saved us a ton of fiber strands!

79 Helpful vote Comments

I***r

Turkey

Verified Purchase

5 .0

2025-04-19

Finding compatible long-range optics for older legacy switches can be hit or miss. This 155M SFP BiDi module was programmed perfectly, link went green instantly, and real-time DOM diagnostics are fully readable. Very satisfied!

106 Helpful vote Comments

A***n

Sweden

Verified Purchase

5 .0

2025-03-12

Operating a mixed-hardware data center usually makes third-party transceivers a nightmare due to port-flapping and unsupportive OEM software, but LINK-PP solved this by custom-coding our batch. One side of our 62km link was coded for our core switch platform while the remote side was matched to our edge router, resulting in flawless recognition on both ends. DDM metrics show precise optical power levels, the simplex LC latching mechanism is tight and secure, and we saved thousands compared to buying original brand transceivers.

95 Helpful vote Comments

W***n

Argentina

Verified Purchase

5 .0

2025-02-08

Hard to find good 155M long-haul optics these days. LINK-PP nailed this LS-BL495501-80C 80km SFP. Direct fit!

87 Helpful vote Comments

J***n

Bulgaria

Verified Purchase

5 .0

2025-01-15

Purchased a batch of transceiver modules for our metro monitoring rack. Running at 155M over simplex single-mode fiber, they run incredibly cool (averaging 38°C on DDM) and have shown rock-solid stability.

121 Helpful vote Comments