Can this module be connected directly to regular single-mode fiber that is already installed in our network?

Yes. The LS-CW491G-80C 1G CWDM SFP is designed for single-mode fiber (SMF) and uses duplex LC connectors. It can be connected to standard single-mode fiber infrastructure, provided the fiber condition, connector quality, splice loss, and total link loss are within the optical power budget.

We are building an 80km CWDM ring. Do both ends of the link need to use 1490nm modules?

Yes. For a standard point-to-point duplex CWDM link, both ends should use the same 1490nm CWDM wavelength and compatible 1G SFP modules. If the link is carried through CWDM MUX/DEMUX equipment, make sure both modules are connected to the corresponding 1490nm channel ports.

Can this LS-CW491G-80C module be used with a CWDM MUX/DEMUX system, or is it only for direct fiber links?

It can be used in both scenarios. For a direct point-to-point link, connect two compatible 1490nm modules over duplex single-mode fiber. For a CWDM multiplexed network, connect the module to the 1490nm port of a compatible CWDM MUX/DEMUX to combine multiple wavelengths onto the same fiber pair.

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LINK-PP LS-CW491G-80C 1G SFP CWDM 1490nm 80km Duplex LC DOM SMF Optisches Transceiver-Modul

Name: LINK-PP LS-CW491G-80C 1G SFP CWDM 1490nm 80km Duplex LC DOM SMF Optisches Transceiver-Modul
Brand: LINK-PP
SKU: 203282
Price: 43 USD
Availability: InStock
Rating: 4.9 (25 reviews)

# 203282

Produkt: LINK-PP LS-CW491G-80C 1G SFP CWDM 1490nm 80km Duplex LC DOM SMF Optisches Transceiver-Modul
SKU: 203282
P / N: LS-CW491G-80C
Preis: 50 €
Lagerfahrzeug: 98 auf Lager
Verkauft: 812
Produkt-URL: https://www.l-p.com/products/492748.htm

Bei Bestellungen über 1000 $ erhalten Sie 15.00 $ Rabatt. , Code: Linkpp15

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Neukunden: 10-Dollar-Gutschein für Bestellungen , Code: linkpp2610

: LINK-PP LS-CW491G-80C 1G SFP CWDM 1490nm 80km Duplex LC DOM SMF Optisches Transceiver-Modul

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Kompatibel:: Cisco; LINK-PP; Allied Telesis; Arista; Brocade; Ciena; Dell; Extreme; Juniper; Netgear

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

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Das speziell für CWDM-Infrastrukturen entwickelte LS-CW491G-80C 1G SFP nutzt eine optische Wellenlänge von 1490 nm, um die Faserauslastung über große Entfernungen zu maximieren. Die Kombination aus integriertem DFB-Laser und PIN-Empfänger gewährleistet eine stabile Signalqualität über Singlemode-Fasern bis zu einer Entfernung von 80 km. Die integrierte digitale optische Überwachung (DOM) ermöglicht die Echtzeit-Überwachung von optischer Ausgangsleistung, Betriebstemperatur, Ruhestrom und Spannung.

LINK-PP Artikelnummer	LS-CW491G-80C	Herstellername	LINK-PP
Formfaktor	SFP	Max. Datenrate	1.25Gbps
Wellenlänge	1490nm	Maximaler Kabelabstand	80 km
Anschluss	Duplex-LC	Medien	SMF
Sendertyp	DFB	Empfängertyp	PIN
TX-Leistung	-1 bis +4 dBm	RX-Leistung	-26 bis -1 dBm
Empfänger-Empfindlichkeit	-26dBm	Empfänger Überlastung	-1dBm
EMV (Elektromagnetische Verträglichkeit)	Unterstützt	DOM	Unterstützt
Betriebstemperaturbereich	0 bis 70 ° C	Protokolle	SFP MSA, SFF-8472

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Q: Can this module be connected directly to regular single-mode fiber that is already installed in our network? Von I***t on 2026-02-03

A: Yes. The LS-CW491G-80C 1G CWDM SFP is designed for single-mode fiber (SMF) and uses duplex LC connectors. It can be connected to standard single-mode fiber infrastructure, provided the fiber condition, connector quality, splice loss, and total link loss are within the optical power budget. Von Admin on 2026-02-04
Q: We are building an 80km CWDM ring. Do both ends of the link need to use 1490nm modules? Von H***n on 2025-11-17

A: Yes. For a standard point-to-point duplex CWDM link, both ends should use the same 1490nm CWDM wavelength and compatible 1G SFP modules. If the link is carried through CWDM MUX/DEMUX equipment, make sure both modules are connected to the corresponding 1490nm channel ports. Von Admin on 2025-11-18
Q: Can this LS-CW491G-80C module be used with a CWDM MUX/DEMUX system, or is it only for direct fiber links? Von J***l on 2025-04-21

A: It can be used in both scenarios. For a direct point-to-point link, connect two compatible 1490nm modules over duplex single-mode fiber. For a CWDM multiplexed network, connect the module to the 1490nm port of a compatible CWDM MUX/DEMUX to combine multiple wavelengths onto the same fiber pair. Von Admin on 2025-04-22

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Ich *** e

Großbritannien

Verifizierter Kauf

5 .0

2026-06-14

Installed several LS-CW491G-80C modules in our CWDM ring — solid performance.

55 Hilfreiche Abstimmung Kommentare

F *** z

Südafrika

Verifizierter Kauf

5 .0

2026-06-02

We installed these CWDM modules as part of a phased data-center edge refresh. The sites do not need 10G on every route, but they do require resilient, monitored 1G connectivity across long single-mode fiber runs. The 1490nm CWDM channel allowed us to retain existing MUX/DEMUX hardware while adding capacity without trenching new fiber. From an operations standpoint, DOM is the biggest benefit. We set monitoring thresholds around receive optical power and watched the results through our normal device-management workflow. During burn-in and traffic testing, the optics remained stable and there were no link flaps. The compact SFP form factor also made replacement simple in populated switch racks. Great balance of reach, diagnostics, and cost.

95 Hilfreiche Abstimmung Kommentare

N *** n

Indien

Verifizierter Kauf

5 .0

2026-05-11

We ordered these for a CWDM MUX/DEMUX upgrade where 1490nm was the open channel. The LS-CW491G-80C CWDM modules came online quickly and held a stable 1.25Gbps link. Nice option for enterprise fiber networks that still run 1G aggregation.

88 Hilfreiche Abstimmung Kommentare

W *** s

Russische Föderation

Verifizierter Kauf

5 .0

2026-04-05

We deployed LS-CW491G-80C 1G 1490nm CWDM SFP transceivers across a multi-building industrial campus. The longest installed route was just under 67km after accounting for the patch-panel path, splices, and CWDM MUX/DEMUX insertion loss. The 80km optical budget gave us the operational headroom we wanted rather than designing right at the limit. During commissioning, we checked the DDM/DOM readings from each endpoint and compared the reported TX/RX values against our optical test results. The modules reported consistent information, and the links stayed free of packet loss and CRC alarms under production traffic. For indoor equipment rooms with 0 – 70°C conditions, this is a dependable 1490nm CWDM SFP for 1G backbone expansion.

137 Hilfreiche Abstimmung Kommentare

Q *** s

Niederlande

Verifizierter Kauf

5 .0

2026-03-21

The DOM information was available in our monitoring platform, including TX/RX optical power and temperature. That is important for us because the fiber route is long and troubleshooting time is expensive. Happy with the module so far.

101 Hilfreiche Abstimmung Kommentare

T *** l

Italien

Verifizierter Kauf

5 .0

2026-02-16

We tested the module with multiple switch platforms in our lab before rolling it out. It was detected correctly, the link remained stable, and diagnostics were readable through the host interface. Good 1490nm CWDM optical module for the price.

100 Hilfreiche Abstimmung Kommentare

G *** g

Japan

Verifizierter Kauf

5 .0

2026-02-03

DOM readings are clean and stable; exactly what our NOC needed.

74 Hilfreiche Abstimmung Kommentare

K *** t

Kanada

Verifizierter Kauf

5 .0

2026-01-27

Great value for an 80km CWDM SFP with digital optical monitoring.

77 Hilfreiche Abstimmung Kommentare

V *** t

Singapur

Verifizierter Kauf

5 .0

2025-12-18

Good alternative when you need a long-distance 1G CWDM SFP transceiver but do not want to redesign the entire optical network. We used it with Duplex LC single-mode fiber and a CWDM passive system. Traffic has been clean since installation.

115 Hilfreiche Abstimmung Kommentare

M *** n

Brasilien

Verifizierter Kauf

5 .0

2025-12-04

Used this 1490nm CWDM SFP module to extend a 1GbE connection between two municipal facilities. The Duplex LC SMF connection was straightforward, and the 80km rating gave us enough margin for the route. DOM values matched our field meter closely.

92 Hilfreiche Abstimmung Kommentare

F *** h

USA

Verifizierter Kauf

5 .0

2025-11-18

Reliable 1490nm 1G CWDM SFP for our 80km fiber path — linked right up.

61 Hilfreiche Abstimmung Kommentare

Ich *** e

Neuseeland

Verifizierter Kauf

4 .0

2025-11-02

The LS-CW491G-80C SFP modules worked perfectly on our 1490nm CWDM 1G links, and DOM readings were available as expected. One outer shipping carton arrived slightly compressed, although every SFP was individually protected and passed our incoming test. Product performance is five-star; shipping presentation could be a bit better.

29 Hilfreiche Abstimmung Kommentare

Z *** n

Thailand

Verifizierter Kauf

5 .0

2025-10-23

Our application was a 1GbE backhaul link between a central server room and several remote telecom cabinets connected through a CWDM transport layer. The LS-CW491G-80C was selected because we specifically needed a commercial-grade 1490nm CWDM SFP with an 80km reach, Duplex LC connector, and DOM support — not a generic 1310nm optic. The installation team used standard LC single-mode jumpers and kept end-face cleaning procedures in place. The links came up immediately after wavelength verification. Over several weeks, receive levels remained comfortably above the -26dBm receiver sensitivity threshold, and the reported optical readings did not drift. This is a strong choice for enterprise CWDM fiber infrastructure where 1.25Gbps capacity is still appropriate.

156 Hilfreiche Abstimmung Kommentare

P *** r

Korea

Verifizierter Kauf

5 .0

2025-10-08

We needed a 1G 1490nm CWDM 80km SFP optical transceiver for an indoor data-room-to-cabinet link. It worked over existing single-mode fiber with LC patch cords and showed usable receive margin. Good procurement experience overall.

83 Hilfreiche Abstimmung Kommentare

S *** t

Spanien

Verifizierter Kauf

5 .0

2025-09-02

This is a practical commercial-temperature 1G CWDM SFP for indoor telecom rooms. Optical levels stayed stable during normal load, and the PIN receiver sensitivity was sufficient for our long single-mode span. Would order again.

138 Hilfreiche Abstimmung Kommentare

G *** s

Malaysia

Verifizierter Kauf

5 .0

2025-08-31

We bought this 1G 1490nm CWDM 80km SFP optical transceiver for a distributed video-surveillance and building-management network. Several remote locations share the same CWDM fiber infrastructure, so the exact wavelength and optical reach were non-negotiable. The LS-CW491G-80C matched the required 1490nm channel and provided enough transmitter power for our engineered path. Our field engineers verified the LC duplex polarity, cleaned every connector, and recorded baseline DOM data at turn-up. The RX levels were within the expected design range, and the modules maintained stable connectivity through regular traffic peaks. It is a commercial-temperature module, so we used it in conditioned indoor cabinets rather than exposed roadside enclosures. For that deployment profile, it has been reliable and easy to manage.

106 Hilfreiche Abstimmung Kommentare

J *** e

Frankreich

Verifizierter Kauf

5 .0

2025-08-09

This 1.25G 1490nm CWDM SFP was recognized immediately and passed traffic overnight.

79 Hilfreiche Abstimmung Kommentare

Norwegen

Verifizierter Kauf

5 .0

2025-07-25

Bought a mixed wavelength batch for a regional fiber ring, including this 1490nm 80km SFP. All modules were clearly separated by wavelength, which avoided installation mistakes. The DFB CWDM transmitter delivered consistent levels at commissioning.

82 Hilfreiche Abstimmung Kommentare

O *** s

Mexiko

Verifizierter Kauf

5 .0

2025-06-30

Purchased for a small batch of remote-site uplinks. The modules were properly labeled, seated well in standard SFP slots, and the DDM monitoring made acceptance testing much faster. No CRC errors after a week of traffic.

121 Hilfreiche Abstimmung Kommentare

H *** n

Indonesien

Verifizierter Kauf

5 .0

2025-06-12

We evaluated this module for a mixed-vendor enterprise network where interoperability, documentation, and repeatability were more important than simply finding the lowest-cost optic. The LS-CW491G-80C CWDM SFP passed our lab checks for 1.25Gbps Ethernet transport, module recognition, and SFF-8472 digital diagnostics. We then rolled out a controlled batch to production locations. The 80km specification is valuable for long campus, metro-edge, and remote-site fiber routes, especially when CWDM channels are already allocated. The reported TX power range of -1 to +4dBm and receiver sensitivity down to -26dBm were aligned with our loss-budget calculations. After deployment, the modules have provided clean links and predictable DOM telemetry. That is exactly what we need for repeatable network maintenance.

119 Hilfreiche Abstimmung Kommentare

R *** l

Schweden

Verifizierter Kauf

5 .0

2025-05-19

Our network team used these for a campus CWDM backbone migration instead of pulling additional fiber. The 1490nm channel fit our wavelength plan, and the 1.25G SFP interface kept the project compatible with existing aggregation hardware. Easy win.

92 Hilfreiche Abstimmung Kommentare

H *** s

Deutschland

Verifizierter Kauf

5 .0

2025-04-22

Good fit for a Duplex LC single-mode fiber deployment, no drama.

52 Hilfreiche Abstimmung Kommentare

J *** n

Belgien

Verifizierter Kauf

4 .0

2025-04-07

Technically, these 80km CWDM SFP modules are solid — stable link, correct wavelength, and no errors during our acceptance test. Delivery took a little longer than expected because our project schedule changed close to dispatch, but the packing and labeling were good. We would still purchase again for the next CWDM expansion.

33 Hilfreiche Abstimmung Kommentare

X***y

Philippinen

Verifizierter Kauf

5 .0

2025-02-28

This 1490nm 80km CWDM SFP was purchased for a regional access network where spare fiber was limited. We used a CWDM wavelength plan to carry several 1G services over one single-mode fiber pair, and this module occupied the 1490nm channel without interfering with the adjacent channels. The DFB transmitter and PIN receiver combination performed as expected over the measured loss budget. We also ran compatibility and monitoring checks before field deployment. The host recognized the module properly, and the SFF-8472 diagnostics gave the operations team useful TX power, RX power, voltage, temperature, and laser-bias visibility. For NOC teams, that visibility matters because it lets you spot degraded connectors or fiber loss before users report an outage.

128 Hilfreiche Abstimmung Kommentare

L *** y

Australien

Verifizierter Kauf

5 .0

2025-01-15

Stable optical power and error-free operation on our long-haul campus link.

53 Hilfreiche Abstimmung Kommentare