What happens to the transmission distance if our outdoor fiber path has multiple mechanical splices and patch panels?

Every splice introduces attenuation, which reduces the effective maximum reach. We advise calculating your total optical link budget to ensure it falls within the module's 20km power margin.

We are multiplexing this onto an existing 8-channel CWDM Mux. Is the 1290nm center wavelength tight enough to prevent bleed-over into the adjacent 1310nm channel?

Yes, it features a highly precise DFB laser with a strict ±6.5nm channel bandwidth tolerance, ensuring zero cross-talk or spectral overlap with neighboring 1270nm or 1310nm channels.

Will this 1290nm SFP module interoperate with a 1310nm standard LR transceiver over a 10km dark fiber span?

No, CWDM channels are wavelength-specific; this module must pair with another 1290nm optic or terminate into a matching CWDM Mux port.

Does the integrated DDM register internal module voltage fluctuations caused by power surges in older network closets?

Yes, the Digital Diagnostic Monitoring telemetry continuously tracks real-time supply voltage, allowing your management software to spot power anomalies.

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Juniper EX-SFP-10GE-CWE29-20 Compatible LINK-PP 10G SFP+ CWDM 1290nm 20km Duplex LC DDM SMF Optical Transceiver Module

Name: Juniper EX-SFP-10GE-CWE29-20 Compatible LINK-PP 10G SFP+ CWDM 1290nm 20km Duplex LC DDM SMF Optical Transceiver Module
Brand: LINK-PP
SKU: 221909
Price: 116.96 USD
Availability: InStock
Rating: 4.8 (10 reviews)

# 221909

Product: Juniper EX-SFP-10GE-CWE29-20 Compatible LINK-PP 10G SFP+ CWDM 1290nm 20km Duplex LC DDM SMF Optical Transceiver Module
SKU: 221909
P/N: LS-CW2910-20C
Price: $ 136
Stock: 34 in Stock
Sold: 903
Product URL: https://www.l-p.com/products/491925.htm

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Manufacture: LINK-PP

P/N: LS-CW2910-20C

Compatible:: Cisco; LINK-PP; Brocade; Ciena; Dell; FS; Generic; H3C; HPE; Juniper

Wavelength:: 1270nm; 1290nm; 1310nm; 1330nm; 1350nm; 1370nm; 1390nm; 1410nm; 1430nm; 1450nm; 1470nm; 1490nm; 1510nm; 1530nm; 1550nm; 1570nm; 1590nm; 1610nm

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Juniper EX-SFP-10GE-CWE29-20 Compatible LINK-PP 10G SFP+ Specifications

EX-SFP-10GE-CWE29-20 standardizes 20km single-mode fiber links utilizing a 1290nm CWDM architecture, blending a hot-swappable 10G SFP+ form factor with advanced DFB/PIN optical components and real-time DDM diagnostics. Engineered for high-density networking, this transceiver delivers low-latency 10Gbps data transmission, full LC duplex connectivity, and reliable SFF-8472 compliance for seamless operational monitoring in enterprise and telecom infrastructures.

Juniper Part Number	EX-SFP-10GE-CWE29-20	Vendor Name	LINK-PP
Form Factor	SFP+	Max Data Rate	10.7Gbps
Wavelength	1290nm	Max Cable Distance	20km
Connector	Duplex LC	Media	SMF
Transmitter Type	DFB	Receiver Type	PIN
TX Power	-5 to +2dBm	RX Power	-16 to -1dBm
Receiver Sensitivity	<-15.5dBm	DDM Support	Yes
Operating Temperature Range	0 to 70°C	Protocols	SFP+ MSA Compliant, CPRI, eCPRI, ITU-T G.652

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Q: What happens to the transmission distance if our outdoor fiber path has multiple mechanical splices and patch panels? By P***e on 2026-04-04

A: Every splice introduces attenuation, which reduces the effective maximum reach. We advise calculating your total optical link budget to ensure it falls within the module's 20km power margin. By admin on 2026-04-05
Q: We are multiplexing this onto an existing 8-channel CWDM Mux. Is the 1290nm center wavelength tight enough to prevent bleed-over into the adjacent 1310nm channel? By N***t on 2026-03-21

A: Yes, it features a highly precise DFB laser with a strict ±6.5nm channel bandwidth tolerance, ensuring zero cross-talk or spectral overlap with neighboring 1270nm or 1310nm channels. By admin on 2026-03-22
Q: Will this 1290nm SFP module interoperate with a 1310nm standard LR transceiver over a 10km dark fiber span? By O***r on 2025-08-03

A: No, CWDM channels are wavelength-specific; this module must pair with another 1290nm optic or terminate into a matching CWDM Mux port. By admin on 2025-08-04
Q: Does the integrated DDM register internal module voltage fluctuations caused by power surges in older network closets? By M***k on 2025-05-29

A: Yes, the Digital Diagnostic Monitoring telemetry continuously tracks real-time supply voltage, allowing your management software to spot power anomalies. By admin on 2025-05-30

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Q***s

United Kingdom

Verified Purchase

5 .0

2026-04-25

No complaints here. Standard indoor server room environment, running cool at around 35°C according to the internal DDM sensor. Clean engineering.

110 Helpful vote Comments

O***d

Ukraine

Verified Purchase

5 .0

2026-03-31

Perfect fit for local ISP distribution. Used these 1290nm 20km modules to tap into an existing CWDM mux. Clean signals all around. Highly recommend for regional network upgrades.

38 Helpful vote Comments

W***t

Indonesia

Verified Purchase

5 .0

2026-03-19

Upgrading our campus Wi-Fi to high-density APs required a complete overhaul of our distribution layer backhaul. We ran these 1290nm 20km SFP transceivers from our central server room out to the edge closets. Even with multiple patch panels along the SMF run, the optical receiver sensitivity holds steady with no bit error rate (BER) spikes. Having operational DDM/DOM metrics exposed via our monitoring dashboard gives our net-ops team total peace of mind.

82 Helpful vote Comments

V***n

Macao

Verified Purchase

5 .0

2025-12-19

We recently expanded our campus fiber network across three remote manufacturing facilities using an existing 8-channel CWDM multiplexer. We allocated the 1290nm grid channel to these LS-CW2910-20C modules. Operating over legacy single-mode fiber at roughly 16.5km, the insertion loss was well within the expected optical power budget. Digital Diagnostic Monitoring (DDM) integrated seamlessly into our SNMP polling system, allowing real-time tracking of bias current and internal temperature. For a commercial-grade 10G SFP+ CWDM 1290nm option, the frequency stability under high traffic loads is impressive. Very satisfied with the hardware reliability.

129 Helpful vote Comments

I***e

Germany

Verified Purchase

5 .0

2025-11-10

DOM readings are spot on. Exactly matches our fluke tester metrics.

41 Helpful vote Comments

R***m

Spain

Verified Purchase

5 .0

2025-10-13

Great addition to our 10G infrastructure. Hooked up our core routing matrix over a duplex SMF line. Immediate link aggregation success.

35 Helpful vote Comments

L***e

Italy

Verified Purchase

5 .0

2025-05-29

Exactly as described. 20km link running stable for 2 weeks straight now.

118 Helpful vote Comments

P***e

Thailand

Verified Purchase

5 .0

2025-04-18

Consistent 10Gbps throughput. Tested across a 12km SMF run under full load. Latency is minimal and the power budget leaves plenty of headroom. Safe bet for any network admin.

27 Helpful vote Comments

Y***y

United Kingdom

Verified Purchase

4 .0

2025-04-11

The LS-CW2910-20C modules perform excellently, and the DDM readings match our hardware precisely. The package took two days longer than expected to clear local customs in the UK, but the product itself is top-tier.

15 Helpful vote Comments

Z***n

Norway

Verified Purchase

4 .0

2025-03-30

The optical link is completely rock-solid on our 1290nm network channel. Just note that the bail latch mechanism is very secure, so it felt a bit tight when extracting it from an older, densely packed patch frame. Once seated, it runs beautifully.

21 Helpful vote Comments