Can this BiDi module establish a link over a single strand of legacy 62.5µm OM1 multi-mode fiber for short distances?

No, the 1310nm/1550nm laser configurations are precisely tuned for 9/125µm single-mode fiber optics and will suffer extreme modal dispersion on multi-mode glass.

Is this module sealed well enough to survive high-humidity server room conditions?

Yes, the physical chassis handles non-condensing relative humidity levels from 5% up to 85% without experiencing optical degradation.

Can the DDM telemetry warn us about a dirty fiber patch cord before the link completely drops?

Yes, by tracking real-time drops in the RX optical power metric, your team can proactively schedule maintenance before packet loss occurs.

Can this Fast Ethernet 155M SFP handle legacy telecom protocols like SONET OC-3?

Yes, the internal optical engine natively supports both 155Mbps Fast Ethernet data streams and synchronous telecom transport architectures.

Does continuous DDM polling impact the data transmission performance or latency of the 155Mbps link?

Not at all. The diagnostic circuitry operates entirely on an independent internal management bus, completely isolated from the primary data path.

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LINK-PP LS-BL315501-40C 155M SFP BiDi 1310nm-TX/1550nm-RX 40km Simplex LC DDM SMF Optical Transceiver Module

Name: LINK-PP LS-BL315501-40C 155M SFP BiDi 1310nm-TX/1550nm-RX 40km Simplex LC DDM SMF Optical Transceiver Module
Brand: LINK-PP
SKU: 205528
Price: 7.31 USD
Availability: InStock
Rating: 4.9 (20 reviews)

# 205528

Product: LINK-PP LS-BL315501-40C 155M SFP BiDi 1310nm-TX/1550nm-RX 40km Simplex LC DDM SMF Optical Transceiver Module
SKU: 205528
P/N: LS-BL315501-40C
Price: $ 8.5
Stock: 290 in Stock
Sold: 2.7K
Product URL: https://www.l-p.com/products/493996.htm

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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-BL315501-40C 155M SFP Specifications

LS-BL315501-40C integrates real-time Digital Diagnostic Monitoring (DDM) into a 155M SFP BiDi optical transceiver module, achieving reliable 40km single-fiber spans via a 1310nm-TX/1550nm-RX wavelength configuration and a simplex LC interface.

LINK-PP Part Number	LS-BL315501-40C	Vendor Name	LINK-PP
Form Factor	SFP	Max Data Rate	155Mbps
Wavelength	1310nm-TX/1550nm-RX	Max Cable Distance	40km
Connector	Simplex LC	Media	SMF
Transmitter Type	FP	Receiver Type	PIN
TX Power	-8 to -1dBm	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: Can this BiDi module establish a link over a single strand of legacy 62.5µm OM1 multi-mode fiber for short distances? By P***n on 2026-04-05

A: No, the 1310nm/1550nm laser configurations are precisely tuned for 9/125µm single-mode fiber optics and will suffer extreme modal dispersion on multi-mode glass. By admin on 2026-04-06
Q: Is this module sealed well enough to survive high-humidity server room conditions? By N***n on 2026-02-26

A: Yes, the physical chassis handles non-condensing relative humidity levels from 5% up to 85% without experiencing optical degradation. By admin on 2026-02-27
Q: Can the DDM telemetry warn us about a dirty fiber patch cord before the link completely drops? By L***m on 2026-01-20

A: Yes, by tracking real-time drops in the RX optical power metric, your team can proactively schedule maintenance before packet loss occurs. By admin on 2026-01-21
Q: Can this Fast Ethernet 155M SFP handle legacy telecom protocols like SONET OC-3? By O***y on 2025-12-17

A: Yes, the internal optical engine natively supports both 155Mbps Fast Ethernet data streams and synchronous telecom transport architectures. By admin on 2025-12-18
Q: Does continuous DDM polling impact the data transmission performance or latency of the 155Mbps link? By M***d on 2025-06-18

A: Not at all. The diagnostic circuitry operates entirely on an independent internal management bus, completely isolated from the primary data path. By admin on 2025-06-19

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J***r

Austria

Verified Purchase

5 .0

2026-04-15

Solid commercial-grade performance. They run slightly warm in fully packed switches but well within the standard operating temperature specs. DDM metrics are useful for pre-failure alerts. Will buy again for next quarterly batch.

126 Helpful vote Comments

D***n

Ukraine

Verified Purchase

5 .0

2026-04-01

Excellent option for scaling down costs on 155Mbps fiber links. The LS-BL315501-40C SFP module provides standard DDM diagnostics that our SNMP server monitors perfectly. No strange errors in the log files.

106 Helpful vote Comments

E***h

Belgium

Verified Purchase

5 .0

2026-03-15

We deploy these in our municipal surveillance networks. Running over single-mode fiber up to 25km and the signal attenuation is minimal. It's tough finding good 155M SFP optics transceivers these days, but LINK-PP delivers quality.

101 Helpful vote Comments

F***m

Thailand

Verified Purchase

5 .0

2026-03-08

We were tasked with expanding a regional SCADA telemetry network for a remote utility automation project, requiring a cost-effective way to bridge long distances between remote stations and the central monitoring hub. Utilizing these 40km 155M single-mode SFP optical transceivers allowed us to build out our topology over a single fiber line, cutting our structural patch infrastructure and optical distribution panel costs in half. On the monitoring side, the digital diagnostics function works flawlessly, reporting highly accurate optical receive power metrics that align perfectly with our physical handheld optical power meters. Hardware integration with our ruggedized field access switches was seamless, throwing zero log warnings or unsupported module alerts during commissioning. Will definitely keep spec'ing this model for our future utility and automation architecture rollouts.

118 Helpful vote Comments

B***m

United States

Verified Purchase

5 .0

2026-02-26

LINK-PP is becoming our go-to for optics. These 40km Simplex LC SFP modules resolved our fiber shortage between buildings instantly. No packet loss recorded over a 48-hour soak test. Appreciate the fast delivery!

137 Helpful vote Comments

C***y

Germany

Verified Purchase

5 .0

2026-02-02

Exactly as specified, the 1310/1550nm pair synced right up.

83 Helpful vote Comments

P***h

United Arab Emirates

Verified Purchase

5 .0

2026-01-22

Needed 155Mbps Fast Ethernet SFP modules for some vintage substation RTUs. These single-mode 40km SFP optical transceivers worked without a hitch. Dom/DDM capability works natively with our legacy monitoring tools. Smooth rollout!

50 Helpful vote Comments

A***n

Canada

Verified Purchase

5 .0

2026-01-14

Fast shipping, simplex LC saves so much patch panel space!

43 Helpful vote Comments

C***e

South Africa

Verified Purchase

5 .0

2025-12-29

The DDM function provides accurate TX/RX power levels, which made troubleshooting our dirty patch panel a breeze. Highly compatible with our legacy Fast Ethernet switches. Definitely stocking up on these.

81 Helpful vote Comments

D***h

Bulgaria

Verified Purchase

5 .0

2025-11-19

Ordered 20 of these 155M BiDi modules for a campus backbone upgrade. The 1310nm-TX/1550nm-RX paired perfectly with the matching downlinks. DDM monitoring lets us track optical power in real-time. Great value for enterprise deployment.

49 Helpful vote Comments

B***e

Brazil

Verified Purchase

5 .0

2025-10-18

Ran a 35km loop test and loss is well within margins. Certified good.

73 Helpful vote Comments

H***p

Sweden

Verified Purchase

4 .0

2025-10-11

Great price for a simplex LC 1310nm/1550nm 40km module. The shipment arrived a day later than estimated due to customs clearance delays at the border, but the hardware compatibility is outstanding.

18 Helpful vote Comments

A***r

New Zealand

Verified Purchase

5 .0

2025-09-16

Using these for long-haul base station backhaul links. The 1310nm/1550nm matching works perfectly over our existing single-fiber infrastructure. Performance is completely stable under varying traffic loads.

96 Helpful vote Comments

F***n

Australia

Verified Purchase

5 .0

2025-08-19

Simplex LC connectors are definitely the way to go when you are low on fiber strands. We salvaged a full strand across our industrial park using these BiDi modules. 40km budget is more than enough for our topology.

79 Helpful vote Comments

G***k

Singapore

Verified Purchase

5 .0

2025-07-23

As an independent internet service provider specializing in rural broadband networks, legacy 155M BiDi SFP links are still widely utilized across our aggregation and edge nodes. Finding high-quality 40km single-mode fiber optics that don't trigger interface rejection errors on older telecom gear is a persistent pain point, but this module completely blew us away. We subjected a sample lot to a rigorous 7-day continuous bit error rate test (BERT) at maximum capacity, and the link returned absolutely zero CRC errors, framing anomalies, or dropped packets. The transceiver handles minor macrobending attenuation along the fiber run gracefully, and the real-time DDM tracking gives our NOC pinpoint accuracy when troubleshooting line degradation.

143 Helpful vote Comments

E***y

Turkey

Verified Purchase

5 .0

2025-07-05

Our engineering team deployed a bulk batch of these transceivers for a highway traffic camera telemetry backhaul network spanning over 35 kilometers. Since these modules feature a standard commercial-grade operating temperature specification, we housed them inside climate-controlled roadside distribution cabinets. The DDM interface is fully MSA-compliant, allowing our automated network management software to poll real-time telemetry seamlessly; even during summer peak heat cycles, the internal module temperature stabilized well below the maximum thermal threshold. The laser bias current remained incredibly steady under a continuous full-duplex traffic load. For regional public sector deployments where absolute field reliability is vital but procurement budgets are tightly constrained, this 40km single-mode module delivers tier-one engineering stability.

153 Helpful vote Comments

E***n

Belarus

Verified Purchase

5 .0

2025-07-03

Cheap, reliable 40km optics for our rural fiber expansion. Zero issues so far.

59 Helpful vote Comments

K***y

Argentina

Verified Purchase

5 .0

2025-06-03

Good 155M SFP BiDi module. It does exactly what it says on the spec sheet. Distance is accurate; we hit 32km with a stable -18dBm RX power. Good value if you are looking to cut down on fiber infrastructure costs.

66 Helpful vote Comments

C***m

Brunei Darussalam

Verified Purchase

5 .0

2025-05-22

LS-BL315501-40C is a lifesaver for old legacy SONET/SDH gear upgrades.

105 Helpful vote Comments

I***n

Russian Federation

Verified Purchase

4 .0

2025-05-14

Modules are solid, plugged into our legacy Fast Ethernet equipment and immediately linked up. The plastic dust caps on the Simplex LC ports were a bit tight to pull off initially, but otherwise, everything is great.

25 Helpful vote Comments