Can I couple this module directly into a legacy 62.5-micron multimode fiber using a mode-conditioning patch cable?

No, this is a dedicated high-power single-mode CWDM laser that requires standard Single-Mode Fiber (SMF) to maintain link stability and reach.

Can we track localized internal voltage dips through the SFF-8472 DDM architecture if our switch chassis experiences power fluctuations?

Yes, the integrated DDM telemetry updates supply voltage and internal module temperature parameters every few seconds directly to your SNMP monitoring stack.

Is this 1390nm 10G SFP module suitable for handling latency-sensitive CPRI mobile backhaul traffic streams?

Absolutely. The direct-modulation laser path features near-zero internal processing latency, making it ideal for strict synchronous telco timing architectures.

If our CWDM channel grid shifts, can this transceiver be software-tuned to a different wavelength?

No, this is a fixed-wavelength 1390nm SFP transceiver module and cannot be tuned via software commands.

Will the zinc alloy outer shell protect the internal circuit board from electromagnetic interference in a high-density chassis?

Yes, the full metal housing provides excellent EMI shielding and minimizes signal crosstalk between closely stacked SFP+ ports.

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Juniper EX-SFP-10GE-CWE39-20 Compatible LINK-PP 10G SFP+ CWDM 1390nm 20km Duplex LC DDM SMF Optical Transceiver Module

Name: Juniper EX-SFP-10GE-CWE39-20 Compatible LINK-PP 10G SFP+ CWDM 1390nm 20km Duplex LC DDM SMF Optical Transceiver Module
Brand: LINK-PP
SKU: 221996
Price: 202.96 USD
Availability: InStock
Rating: 4.9 (11 reviews)

# 221996

Product: Juniper EX-SFP-10GE-CWE39-20 Compatible LINK-PP 10G SFP+ CWDM 1390nm 20km Duplex LC DDM SMF Optical Transceiver Module
SKU: 221996
P/N: LS-CW3910-20C
Price: $ 236
Stock: 65 in Stock
Sold: 977
Product URL: https://www.l-p.com/products/491988.htm

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Manufacture: LINK-PP

P/N: LS-CW3910-20C

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-CWE39-20 Compatible LINK-PP 10G SFP+ Specifications

EX-SFP-10GE-CWE39-20 is a specialized 10G SFP+ CWDM optical transceiver module engineered for 20km duplex LC single-mode fiber links, leveraging a precise 1390nm DFB laser and highly sensitive PIN photodiode coupled with integrated digital diagnostic monitoring (DDM) to ensure deterministic signal integrity.

Juniper Part Number	EX-SFP-10GE-CWE39-20	Vendor Name	LINK-PP
Form Factor	SFP+	Max Data Rate	10.7Gbps
Wavelength	1390nm	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	Receiver Overload	0.5dBm
Operating Temperature Range	0 to 70°C	Protocols	SFP+ MSA Compliant, CPRI, eCPRI, ITU-T G.652

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Q: Can I couple this module directly into a legacy 62.5-micron multimode fiber using a mode-conditioning patch cable? By Y***e on 2026-01-10

A: No, this is a dedicated high-power single-mode CWDM laser that requires standard Single-Mode Fiber (SMF) to maintain link stability and reach. By admin on 2026-01-11
Q: Can we track localized internal voltage dips through the SFF-8472 DDM architecture if our switch chassis experiences power fluctuations? By M***e on 2025-09-07

A: Yes, the integrated DDM telemetry updates supply voltage and internal module temperature parameters every few seconds directly to your SNMP monitoring stack. By admin on 2025-09-08
Q: Is this 1390nm 10G SFP module suitable for handling latency-sensitive CPRI mobile backhaul traffic streams? By J***n on 2025-07-10

A: Absolutely. The direct-modulation laser path features near-zero internal processing latency, making it ideal for strict synchronous telco timing architectures. By admin on 2025-07-11
Q: If our CWDM channel grid shifts, can this transceiver be software-tuned to a different wavelength? By S***d on 2025-05-18

A: No, this is a fixed-wavelength 1390nm SFP transceiver module and cannot be tuned via software commands. By admin on 2025-05-19
Q: Will the zinc alloy outer shell protect the internal circuit board from electromagnetic interference in a high-density chassis? By O***t on 2025-02-03

A: Yes, the full metal housing provides excellent EMI shielding and minimizes signal crosstalk between closely stacked SFP+ ports. By admin on 2025-02-04

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S***h

Argentina

Verified Purchase

5 .0

2026-03-25

Perfect fit for high-density enterprise switch stacks. The low power dissipation of these commercial-grade modules keeps our rack thermal load fully manageable. Even when stacked closely together in a 48-port SFP+ switch, they run surprisingly cool.

45 Helpful vote Comments

J***y

Bangladesh

Verified Purchase

5 .0

2026-02-22

Our company expanded into a neighboring business park, and we needed to connect the new building's distribution closet back to our primary server room over 10km. To conserve precious fiber cores for future 100G migrations, we chose to deploy a CWDM multiplexing system using these 1390nm optical transceivers. Reliability has been stellar since day one, as the hardware conforms perfectly to all standard IEEE 802.3 and SFP+ MSA protocols. They slide out effortlessly via the extraction pull-tab when moving ports, but seat firmly when locked in.

137 Helpful vote Comments

A***e

Brunei Darussalam

Verified Purchase

5 .0

2026-01-17

Impressed with the Digital Optical Monitoring (DOM) integration. We track transceiver status via SNMP in our monitoring dashboard. These 10G 1390nm 20km transceivers show accurate TX/RX power levels and temperature metrics. No weird spikes or protocol-level glitches so far. Solid build quality!

46 Helpful vote Comments

K***n

Nepal

Verified Purchase

5 .0

2025-12-22

Operating a mid-sized municipal utility network means we must maximize every dollar of public infrastructure funding. These 10G CWDM transceivers allowed us to upgrade our legacy 1G aggregate links to a robust 10Gbps framework without ditching our existing passive CWDM assets. The modules arrived individually packed in pristine anti-static trays, and the duplex LC interface clicked securely into our fiber setups. We monitored them during a recent major traffic spike, and they maintained zero latency degradation or frame drops.

143 Helpful vote Comments

S***e

Maldives

Verified Purchase

5 .0

2025-12-05

Rock solid CWDM SFP+ module. Running 20km backhaul with zero packet loss. (^_^)

21 Helpful vote Comments

B***s

Cambodia

Verified Purchase

5 .0

2025-10-14

Perfect for our regional office campus fiber network expansion. Needed to scale our metro aggregation layer without laying more glass. These LINK-PP LS-CW3910-20C SFP modules solved it via our existing CWDM mux/demux grid. The 1390nm wavelength channel works perfectly on standard single-mode fiber. (•̀ᴗ•́)و

67 Helpful vote Comments

K***y

Libyan Arab Jamahiriya

Verified Purchase

5 .0

2025-08-09

Solid 20km optics. Upgraded our campus backbone, latency is non-existent.

20 Helpful vote Comments

T***t

New Zealand

Verified Purchase

5 .0

2025-06-04

Great stability in standard indoor network closets. Deployed these in our main building MDF. They have been running 24/7 for over one months now without a single flapping link or port reset. Will definitely look into LINK-PP for our next optical hardware refresh.

72 Helpful vote Comments

L***m

Ukraine

Verified Purchase

4 .0

2025-05-02

Flawless throughput, but took an extra minute to register on legacy gear. Running this SFP+ 10G CWDM 1390nm unit on our secondary storage network. On our modern Arista switches, it's instant plug-and-play. On an older legacy 10G switch stack, the port spent about 30 seconds blinking amber before turning green and negotiating full speed. Works great now, just be patient on old hardware! ⏳

29 Helpful vote Comments

G***y

Belarus

Verified Purchase

5 .0

2025-04-29

Clean single-mode optical performance over 15km. Running these transceivers across a 15km dark fiber span between two corporate offices. Power budget is generous enough for a stable 20km reach, so our light levels are sitting comfortably in the sweet spot. No CRC errors on the port counters.

79 Helpful vote Comments

L***h

Philippines

Verified Purchase

5 .0

2025-01-12

We are utilizing these 10G 1390nm 20km SFP transceivers for a regional cell site backhaul project, running standard 10G traffic over a 12km fiber loop. Since these are commercial-grade units, we have them housed inside our climate-controlled central office edge switchboards. Performance is extremely stable, and the average power consumption is remarkably low, which prevents localized overheating on dense 48-port SFP+ cards. The precise DOM telemetry tracks beautifully via SNMP, making proactive link monitoring easy for our team.

104 Helpful vote Comments