Trusted by the Highest-Stakes Buyers
Federal agencies and Fortune 500 operations source through ORM Systems.
US Government & Defense
Enterprise Clients
Featured Deal
Hand-picked by our procurement team for standout value. This unit is offered at our sharpest price on current stock, verified against live market rates.
Name:
2 In stock - Ready to Ship
Certified Refurbished
Professionally inspected, bench-tested, and firmware-verified, with configurations wiped. Restored to full working order and backed by our warranty.
3 Year Extended Warranty
Same-day Shipping
30-Day Money Back Guarantee
Shipping:
Payment:
3 Year Extended Warranty
Same-day Shipping
30-Day Money Back Guarantee
Need Additional Discount on Product?
Request a quote below - Get Exclusive Pricing and Support.
Shipping:
Payment:
DWDM-SFP-3661-C
1000BASE-DWDM SFP 1536.61nm 80KM Cisco Compatible
Trusted by the Highest-Stakes Buyers
Federal agencies and Fortune 500 operations source through ORM Systems.
US Government & Defense
Enterprise Clients
Built Global. Stocked Local.
Regional teams and 25+ distribution partners keep stock near you and accountability in your time zone.
Buyer Protection on Every Order
Pay by PayPal or Revolut with full chargeback rights. Order on PO terms, Net-30 for government.
Verified By Federal Bodies
Every registration we claim is public record — check our federal contractor status yourself before you spend a dollar.

Since 2016, Enterprise-Trusted
Ten years serving buyers who audit their vendors. From federal agencies to 20,000+ enterprise clients worldwide.
DWDM-SFP-3661-C is a DWDM small form-factor pluggable transceiver designed for long-range applications in data centers, enterprise networks, and telecom infrastructures. This SFP module supports a 1G data rate over single-mode fiber using an LC connector, making it ideal for DWDM systems that require high precision and extended transmission distances.
Engineered with a compact SFP form factor, the DWDM-SFP-3661-C offers exact physical dimensions for seamless integration into a variety of network equipment. It supports Ethernet and Fibre Channel protocols and ensures compatibility with leading network vendors, providing reliable connectivity for both short and long-range deployments.
DWDM-SFP-3661-C price is is available on request. Get immediate quote.
Request bulk order quote for DWDM-SFP-3661-C for additional pricing. Browse the full Cisco Compatible Sfp Dwdm series or explore all Orm products.
Mon–Fri: [09:00-16:00]
Avg. response under 30 mins
| Product Type | Transceiver | Transceiver | Transceiver | Transceiver | Transceiver |
| Form Factor | SFP | SFP | SFP | SFP | SFP |
| Data Rate | 1G | 1G | 1G | 1G | 10G |
| Connector Type | LC | LC | LC | LC | LC |
| Wavelength | 1550 nm | 1550 nm | 1550 nm | 1550 nm | 1550 nm |
| Transmission Distance | Long-Range | Long-Range | Long-Range | Long-Range | Long-Range |
| Fiber Type | Single-mode | Single-mode | Single-mode | Single-mode | Single-mode |
| Max Distance | 80 km | 80 km | 80 km | 80 km | 120 km |
| Supported Protocols | Ethernet, Fibre Channel | Ethernet | Ethernet, Fibre Channel | Ethernet | Ethernet |
| Network Interface | Fiber | Fiber | Fiber | Fiber | Fiber |
| Operating Temperature | 0 to 70°C | 0 to 70°C | 0 to 70°C | 0 to 70°C | 0 to 70°C |
| Storage Temperature | -40 to 85°C | -40 to 85°C | -40 to 85°C | -40 to 85°C | -40 to 85°C |
| Input Voltage | 3.3V | 3.3V | 3.3V | 3.3V | 3.3V |
| Compatibility | Cisco, Juniper, Huawei, Arista | Cisco / Juniper / Huawei / Arista | Cisco, Juniper, Huawei, Arista | Cisco | Cisco / Juniper / Huawei / Arista |
| Product Name | DWDM-SFP-3661-C | DWDM-SFP-4612-C | DWDM-SFP-3425-C | DWDM-SFP-5979-C | DWDM-SFP-4931-120-C |
Every unit is authentic, sourced through trusted and authorised channels, and serial-verified on request. Genuine networking and IT hardware, guaranteed, or your money back.
New products are backed by up to 3 years of extended warranty, and certified refurbished units by up to 3 months, for dependable protection on every order. Coverage is clear, honoured in full, and confirmed on each product page.
If a unit ever falls short, our streamlined RMA process gets a replacement to you fast, with advance replacement available to keep your network running. No jargon, no runaround.
Every device is inspected, bench-tested, and firmware-verified, with configurations wiped before dispatch. Additional testing can be arranged to confirm full working condition on request.
Our specialists assist with compatibility, configuration, licensing, and installation, before and after you buy. Real hardware expertise, whenever you need it.
dispatched quickly and shipped worldwide from regional hubs, fully tracked and insured.
Precise 1536.61nm alignment. Stable 80KM link on our Cisco core. Flawless data transmission with high signal integrity.
Reliable DWDM SFP. Recognized instantly with no configuration issues. A solid choice for high-density fiber-optic transport.
Superior signal quality over 80KM. Wavelength 1536.61nm is stable and precise. Excellent performance for regional ISP backbones.
Professional grade reliability. Consistent throughput and robust build. Perfectly compatible with our multiplexing setup and chassis.
Great 1536.61nm optics. Fast installation and rock-solid performance. A dependable solution for expanding our long-range bandwidth.
Strong 80KM reach and zero errors. These transceivers provide the stability needed for mission-critical fiber networking.
The DWDM-SFP-3661-C is a Cisco-compatible 1000BASE-DWDM SFP transceiver operating at 1536.61 nm for up to 80 km on single-mode fiber.
Yes. It fully supports Cisco SFP ports and IOS, offering plug-and-play compatibility without additional configuration.
It requires single-mode fiber (9/125 µm) to achieve its specified 80 km reach with minimal attenuation.
Up to 80 km over standard single-mode fiber at 0.2 dB/km attenuation.
1536.61 nm corresponds to ITU-T DWDM Channel 61, designed for dense wavelength multiplexing in the C-band.
It supports 1.25 Gbps for Gigabit Ethernet and Fibre Channel applications.
Yes. It offers DOM for real-time monitoring of optical power, voltage, current, and temperature via I²C.
0 °C to 70 °C (32 °F to 158 °F) for standard commercial environments.
Yes. It complies with the SFP MSA standard, allowing safe insertion and removal without powering down.
Transmit power: 0 to +4 dBm; receive sensitivity: -24 dBm; optical power budget: 24 dB.
Yes. It meets RoHS 6/6 directives, ensuring lead-free materials and environmental safety.
Insert the module into an empty SFP slot, press until it latches, connect single-mode fiber, then verify link status via CLI.
Use CLI commands to view DOM readouts and link status, or perform an optical power measurement with a fiber tester.
The module includes a 1-year limited warranty plus lifetime technical support and RMA services.
DWDM uses tighter channel spacing in the C-band for higher capacity, while CWDM uses wider spacing for lower cost.
Yes. It complies with ITU-T G.694.2, ensuring seamless interoperability with multi-vendor DWDM systems.