Overview
This is a high-performance, MSA-compliant QSFP+ optical transceiver, designed to be a fully compatible and cost-effective equivalent to the Cisco QSFP-40G-ER4. It is engineered for extended-reach 40 Gigabit Ethernet applications, conforming to the 40GBASE-ER4 standard to provide reliable connectivity over distances of up to 40 kilometers using standard single-mode fiber (SMF).
The module leverages Coarse Wavelength Division Multiplexing (CWDM) technology, integrating four independent 10Gbps data lanes onto four different wavelengths within the 1310nm window. These signals are multiplexed and demultiplexed internally, allowing for 40Gbps data transmission over a standard duplex fiber pair. It is an ideal solution for service provider aggregation, enterprise core networks, and Data Center Interconnects (DCI) that require high-speed, long-distance links.
Key Features
- 100% compatible with Cisco equipment that supports the QSFP-40G-ER4 module.
- Conforms to the 40GBASE-ER4 Ethernet standard and QSFP+ MSA.
- Supports an aggregate data rate of 41.25 Gbps (4 x 10.3125 Gbps).
- Extended Reach: Capable of transmitting up to 40km over duplex single-mode fiber (G.652).
- Utilizes 4 CWDM DFB lasers (1271, 1291, 1311, 1331 nm) and a PIN photodetector array.
- Connector: Duplex LC/UPC.
- Built-in Digital Optical Monitoring (DOM/DDM) for real-time monitoring of all four lanes.
- Hot-pluggable QSFP+ form factor for seamless installation and maintenance.
- Low power consumption design for operational efficiency.
Applications
The extended reach and high bandwidth of the QSFP-40G-ER4 compatible module make it perfect for:
- 40G Ethernet links between data centers (DCI).
- Enterprise campus and core network backbones.
- Service provider aggregation and transport networks.
- High-speed interconnects for switches, routers, and transport equipment.
- High-performance computing (HPC) clusters.
Specifications
| Parameter | Value |
|---|---|
| Compatible Part Number | QSFP-40G-ER4 |
| Form Factor | QSFP+ |
| Standard | 40GBASE-ER4 |
| Data Rate | 41.25 Gbps (4 x 10.3125G) |
| Wavelengths | 4-Lane CWDM: 1271, 1291, 1311, 1331 nm |
| Max Distance | 40km |
| Fiber Type | Single-Mode Fiber (SMF) |
| Connector Type | Duplex LC/UPC |
| DOM/DDM Support | Yes |
| Operating Temperature | 0°C to 70°C (32°F to 158°F) |
Cross-Platform Compatibility
While programmed for guaranteed compatibility with Cisco platforms, this module’s adherence to MSA standards ensures it can also function in a wide array of networking hardware from other vendors that do not lock their ports to proprietary optics.
| MANUFACTURER | EQUIVALENT PART NUMBER |
|---|---|
| Juniper | JNP-QSFP-40G-ER4 |
| Arista | QSFP-40G-ER4 |
| MSA Generic | QSFP-40G-ER4 |
| FS.COM | QSFP-40G-ER4 |
FAQ (Technical & Product Questions)
1. How does a 40GBASE-ER4 module work?
A 40GBASE-ER4 module functions by using four separate 10Gbps lasers, each on a different wavelength (1271nm, 1291nm, 1311nm, 1331nm). These four light signals are combined (multiplexed) and sent over a single fiber strand. The receiving module at the other end separates (demultiplexes) the signals back into four 10Gbps lanes, achieving an aggregate bandwidth of 40Gbps over a duplex fiber pair.
2. What is the difference between QSFP-40G-ER4 and QSFP-40G-LR4?
The primary difference is the reach. The QSFP-40G-LR4 (“Long Reach”) is designed for distances up to 10km, while the QSFP-40G-ER4 (“Extended Reach”) uses more powerful optics (specifically an APD receiver) to support distances up to 40km.
3. Can a QSFP-40G-ER4 module connect to four separate 10G SFP+ ports?
No, not directly. The QSFP-40G-ER4 is designed for a point-to-point 40G connection. To connect a 40G port to four 10G ports, you would need a QSFP+ breakout module, such as a QSFP-40G-SR4 for short distances over MPO fiber, or use a 40G port that supports breakout mode with the appropriate cabling and optics (like 4x10G-LR4 Lite).
4. What kind of fiber patch cable should I use with this module?
You must use a standard single-mode fiber (SMF) patch cable, such as OS1 or OS2, that is terminated with Duplex LC/UPC connectors on both ends.
5. Will using this compatible QSFP-40G-ER4 transceiver void my Cisco equipment warranty?
No. In the United States, the Magnuson-Moss Warranty Act protects consumers from manufacturers voiding warranties due to the use of third-party parts. Our transceivers are built to strict MSA (Multi-Source Agreement) standards to ensure they function identically to OEM parts and will not cause any harm to your networking equipment.
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