Will the DDM feature track real-time optical power loss over a long 100km+ dark fiber span with multiple splices?

Yes, DDM continuously tracks live RX optical power, allowing you to monitor link attenuation in real time.

If we send 1490nm TX from our main site using this LS-BL49552G-A2C module, what specific counterpart model do we need at the remote end 110km away?

You will need the complementary 2.5G 120km BiDi SFP module configured with 1550nm-TX / 1490nm-RX to complete the single-strand link.

Can this 2.5G BiDi SFP transceiver handle SDH STM-16 framing for a legacy telecom backhaul link?

Yes, it natively supports SDH STM-16 and SONET OC-48 rates up to 2.5Gbps.

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LINK-PP LS-BL49552G-A2C 2.5G SFP BiDi 120km 1490nm-TX/1550nm-RX Simplex LC DDM SMF Optical Transceiver Module

Name: LINK-PP LS-BL49552G-A2C 2.5G SFP BiDi 120km 1490nm-TX/1550nm-RX Simplex LC DDM SMF Optical Transceiver Module
Brand: LINK-PP
SKU: 206956
Price: 77.4 USD
Availability: InStock
Rating: 4.9 (27 reviews)

# 206956

Product: LINK-PP LS-BL49552G-A2C 2.5G SFP BiDi 120km 1490nm-TX/1550nm-RX Simplex LC DDM SMF Optical Transceiver Module
SKU: 206956
P/N: LS-BL49552G-A2C
Price: $ 90
Stock: 290 in Stock
Sold: 1.7K
Product URL: https://www.l-p.com/products/494435.htm

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Compatible P/N:: LS-BL49552G-80C | 80km; LS-BL49552G-80I | 80km; LS-BL49552G-A2C | 120km

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LINK-PP LS-BL49552G-A2C 2.5G SFP Specifications

LS-BL49552G-A2C serves as a long-range 2.5G BiDi SFP optical transceiver that handles single-mode fiber transmissions up to 120km via 1490nm-TX/1550nm-RX wavelengths, engineered to operate seamlessly between 0 and +70°C while offering real-time Digital Diagnostic Monitoring for precise telemetry.

LINK-PP Part Number	LS-BL49552G-A2C	Vendor Name	LINK-PP
Form Factor	SFP	Max Data Rate	2.5Gbps
Wavelength	1490nm-TX/1550nm-RX	Max Cable Distance	120km
Connector	Simplex LC	Media	SMF
Transmitter Type	DFB	Receiver Type	TIA+APD
TX Power	-2 to +4dBm	RX Power	-23 to -1dBm
Receiver Sensitivity	-27dBm	DOM Support	Yes
Operating Temperature Range	0 to 70°C	Protocols	Fast Ethernet, Gigabit Fibre Channel, MSA Compliant

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Q: Will the DDM feature track real-time optical power loss over a long 100km+ dark fiber span with multiple splices? By G***s on 2026-03-05

A: Yes, DDM continuously tracks live RX optical power, allowing you to monitor link attenuation in real time. By admin on 2026-03-06
Q: If we send 1490nm TX from our main site using this LS-BL49552G-A2C module, what specific counterpart model do we need at the remote end 110km away? By H***n on 2025-09-23

A: You will need the complementary 2.5G 120km BiDi SFP module configured with 1550nm-TX / 1490nm-RX to complete the single-strand link. By admin on 2025-09-24
Q: Can this 2.5G BiDi SFP transceiver handle SDH STM-16 framing for a legacy telecom backhaul link? By F***e on 2025-02-16

A: Yes, it natively supports SDH STM-16 and SONET OC-48 rates up to 2.5Gbps. By admin on 2025-02-17

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E***d

United Kingdom

Verified Purchase

5 .0

2026-06-15

Reliable hardware performance and clean signal-to-noise ratio over long-distance single-mode links. The optics running temperature sits comfortably around 38°C in standard server room racks. Good price-to-performance ratio for commercial deployment.

42 Helpful vote Comments

B***l

United States

Verified Purchase

5 .0

2026-06-08

Upgrading our regional transport links from 1G to 2.5G required reliable BiDi transceivers capable of handling 120km distances on single-mode fiber. The 1490nm-TX / 1550nm-RX optical budget on these modules easily bridged our longest unamplified span. Line-rate packet capture confirmed zero frame loss or jitter during peak traffic hours. Furthermore, thermal characteristics stay well within the 0°C to 70°C commercial operating range in our climate-controlled headend station. A cost-effective, engineering-grade optical module for carrier-grade and enterprise networks.

158 Helpful vote Comments

M***r

Cambodia

Verified Purchase

5 .0

2026-05-18

The APD photo detector really shines on our 100km dark fiber links—we're getting clean RX power readings even at the edge of the 120km spec. Hot-pluggable design saved us downtime during the swap from our old 1G optics.

85 Helpful vote Comments

G***n

Israel

Verified Purchase

5 .0

2026-04-29

Doubled our campus backbone throughput over single-strand fiber instantly.

50 Helpful vote Comments

Z***y

United Arab Emirates

Verified Purchase

5 .0

2026-04-11

We tested these on a 105km leased fiber pair between two colos for our router/server interconnect. The 120km SMF transmission spec isn't marketing fluff — we measured -19dBm RX on clean fiber with no amplifiers. The SFP MSA compliance means our multi-vendor switch environment recognizes them instantly, and the SFF-8472 DDM data integrates seamlessly with our monitoring stack. The 1490nm DFB laser shows minimal wavelength drift even over day/night temperature cycles. We paired these with the 1550-TX/1490-RX variant on the far end, and the link trained at 2.5G full duplex immediately.

100 Helpful vote Comments

P***r

Morocco

Verified Purchase

5 .0

2026-03-14

The real-time Digital Diagnostic Monitoring is a game-changer for our remote site maintenance — we can track TX bias and RX power without sending a technician onsite. Works great with our SNMP monitoring tools.

114 Helpful vote Comments

O***g

Finland

Verified Purchase

5 .0

2026-03-04

Works perfectly, the 120km reach is absolutely legit for our campus fiber backbone and we've had zero issues so far.

50 Helpful vote Comments

C***t

Ukraine

Verified Purchase

5 .0

2026-02-24

Deployed 20+ of these 120km SFP modules across multiple sites, zero failures in 2 months — rock-solid reliability.

60 Helpful vote Comments

T***r

Nepal

Verified Purchase

5 .0

2026-02-10

Upgraded our point-to-point wireless backhaul aggregation to 2.5G optical fiber. Utilizing single-mode single-strand fiber saved us from deploying additional cable runs. Signal stability at 1490nm TX is rock solid, and power consumption remains minimal inside our distribution room.

82 Helpful vote Comments

J***l

Denmark

Verified Purchase

5 .0

2026-01-18

The 2.5Gbps bit rate is perfect for our fiber backbone upgrade, and the hot-pluggable SFP footprint made installation a breeze. The 1490nm DFB laser paired with the APD detector gives us solid 120km reach on our SMF runs without any signal loss.

102 Helpful vote Comments

D***n

Turkey

Verified Purchase

5 .0

2025-12-30

Wavelength pairing (1490-TX/1550-RX) matched our existing BiDi links perfectly, no handshaking issues at all.

107 Helpful vote Comments

D***t

Germany

Verified Purchase

4 .0

2025-12-20

Product hardware and 2.5G 120km optical specifications are completely spot on. However, local courier delivery was delayed by 48 hours due to regional holiday shipping backlogs. Once installed, the module linked up instantly without issues.

29 Helpful vote Comments

V***d

Bangladesh

Verified Purchase

5 .0

2025-12-12

We integrated 24 units into our SDH STM-16 backbone to replace aging 1G optics. The 2.5Gbps bit rate handles our increased traffic load perfectly, and the 1490nm DFB laser shows excellent wavelength stability over our 95km SMF runs. The APD photo detector delivers consistent RX power around -21dBm, well within spec. Real-time DDM via SFF-8472 lets us monitor TX bias current and optical power directly through our NMS, which is critical for SLA reporting. The single +3.3V power supply keeps power draw low in our dense chassis. After 60 days, zero errors or link drops.

136 Helpful vote Comments

O***n

Libyan Arab Jamahiriya

Verified Purchase

5 .0

2025-11-05

We tested these on our SONET OC-48 system and the 1490nm DFB laser stability is noticeable. The single-fiber BiDi design cut our fiber count in half for our campus-wide deployment.

62 Helpful vote Comments

I***a

Bulgaria

Verified Purchase

5 .0

2025-10-15

Excellent 1490nm-TX / 1550nm-RX signal stability across long optical runs.

65 Helpful vote Comments

A***s

Argentina

Verified Purchase

5 .0

2025-10-01

Deploying long-range optics always carries risk regarding signal attenuation and switch port compatibility. These 2.5G 120km BiDi SFP modules passed all our deployment checks with flying colors. We monitored optical power budgets across a 110km dark fiber leased circuit: launch power sat cleanly at +2.5dBm, and received power settled at -20dBm, well above receiver sensitivity limits. The DDM implementation operates cleanly, reporting voltage, temperature, and optical levels directly to our monitoring framework without requiring auxiliary driver installations. Perfect choice for enterprise backbone expansion.

120 Helpful vote Comments

R***y

Macao

Verified Purchase

5 .0

2025-09-26

The Simplex LC receptacle is ideal for our space-constrained fiber panels, and the 120km SMF transmission spec gives us plenty of headroom on our 100km links. The RoHS compliance was a key requirement for our EU-based clients.

97 Helpful vote Comments

A***g

Poland

Verified Purchase

5 .0

2025-09-17

Finally found a 2.5G BiDi SFP that actually hits 120km without errors—this is a solid choice for long-haul deployments.

72 Helpful vote Comments

K***l

Belarus

Verified Purchase

5 .0

2025-08-21

We deployed these in our SDH STM-16 network and they work flawlessly with the single +3.3V power supply. The real-time DDM feature lets us monitor optical power and temperature directly from our switch dashboard, which is super convenient.

98 Helpful vote Comments

E***s

Ireland

Verified Purchase

5 .0

2025-07-11

DOM monitoring makes troubleshooting way easier in remote sites, we can track optical health without being onsite.

43 Helpful vote Comments

S***y

Maldives

Verified Purchase

5 .0

2025-07-02

We run these in our 2x Fiber Channel SAN and the APD detector handles our 90km fiber runs without needing amplifiers. The hot-pluggable SFP footprint made it easy to swap in these modules without powering down our core switches.

113 Helpful vote Comments

L***t

Brunei Darussalam

Verified Purchase

5 .0

2025-06-04

For our 2x Fiber Channel setup, these modules deliver consistent performance over 80km of single-mode fiber. The Simplex LC receptacle fits our existing patch panels perfectly, and RoHS compliance was a must for our procurement team.

75 Helpful vote Comments

W***s

Iran, Islamic Republic of

Verified Purchase

5 .0

2025-05-27

We needed 2.5G for our disaster recovery SAN and these modules nailed it. The hot-pluggable SFP footprint made installation trivial — no downtime during the swap. On 110km of OS2 fiber, the APD detector pulls in -18dBm RX power cleanly, and the DFB laser TX stays steady at +2dBm. The Simplex LC receptacle fits our existing fiber infrastructure perfectly, and RoHS compliance was required for our EU data center. The 0 to +70°C operating temp is fine for our climate-controlled MDFs. DDM polling via SNMP shows no drift over 3 weeks.

148 Helpful vote Comments

B***t

Romania

Verified Purchase

5 .0

2025-05-03

Single LC simplex is a lifesaver for our sparse fiber runs, halved our fiber count and simplified patching.

69 Helpful vote Comments

N***s

Lithuania

Verified Purchase

5 .0

2025-04-16

Using these in our router/server interface for a data center interconnect, the SFP MSA compliance means no vendor lock-in headaches. The 0 to +70°C operating case temperature is fine for our climate-controlled racks, and DDM data is accurate.

94 Helpful vote Comments

H***r

Hungary

Verified Purchase

5 .0

2025-03-08

Flawless 120km span link, low power draw, zero frame drops.

88 Helpful vote Comments

C***n

Japan

Verified Purchase

4 .0