Overview
This is a high-performance QSFP+ optical transceiver designed as a fully compatible and cost-effective equivalent to the Cisco WSP-Q40GLR4L. It is engineered for 40 Gigabit Ethernet applications, specifically adhering to the 40GBASE-LR4L (Lite) standard. This module provides a reliable solution for links up to 2 kilometers over standard single-mode fiber (SMF), bridging the gap between short-reach multi-mode optics and more expensive 10km long-reach modules.
Internally, the module uses four independent 10Gbps LAN WDM optical lanes, multiplexed together to transmit and receive an aggregate 40Gbps signal. This allows it to use a standard Duplex LC connector, simplifying cabling infrastructure compared to MPO-based parallel optics. It is an ideal choice for campus backbones, building-to-building interconnects, and data center links where the 10km reach of standard 40GBASE-LR4 is not required.
Key Features
- 100% compatible with Cisco platforms that support the WSP-Q40GLR4L module.
- Conforms to the 40GBASE-LR4L Ethernet standard and QSFP+ MSA.
- Supports an aggregate data rate of 41.2 Gbps.
- Intermediate Reach: Transmits up to 2km over Single-Mode Fiber (G.652 SMF).
- Operates on four LAN WDM wavelengths in the 1310nm window (1271, 1291, 1311, 1331 nm).
- Connector: Duplex LC/UPC.
- Built-in Digital Optical Monitoring (DOM/DDM) for real-time performance tracking.
- Hot-pluggable QSFP+ form factor for easy installation and maintenance.
- Lower power consumption than standard 10km 40GBASE-LR4 modules.
Applications
The WSP-Q40GLR4L compatible module is perfectly suited for:
- 40G connections between switches, routers, and servers in data centers.
- Enterprise core and distribution layer interconnects.
- Campus and metropolitan area network (MAN) links up to 2km.
- A cost-effective upgrade path from 10G to 40G over existing SMF infrastructure.
Specifications
| Parameter | Value |
|---|---|
| Compatible Part Number | WSP-Q40GLR4L |
| Form Factor | QSFP+ |
| Standard | 40GBASE-LR4L |
| Data Rate | 41.2 Gbps |
| Wavelength | 4x LAN WDM (1271-1331nm) |
| Max Distance | 2km |
| 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
Programmed for seamless integration with Cisco networking equipment, this module’s adherence to MSA (Multi-Source Agreement) standards ensures it can also function in hardware from various other manufacturers that do not require proprietary vendor-specific coding.
FAQ (Technical & Product Questions)
1. What is the main difference between 40GBASE-LR4L and 40GBASE-LR4?
The primary difference is the maximum transmission distance and associated cost. The standard 40GBASE-LR4 is designed for links up to 10 kilometers. The 40GBASE-LR4L (“Lite”) is a more economical variant specified for shorter links up to 2 kilometers, using components optimized for that distance, which typically results in lower power consumption and cost.
2. Can I connect a WSP-Q40GLR4L module to a standard 40GBASE-LR4 module?
Yes, the modules are interoperable as they use the same LAN WDM technology and wavelengths. However, when you connect an LR4L (2km) module to an LR4 (10km) module, the maximum achievable link distance will be limited by the shorter-range module, which is 2km.
3. Does this 40G module use an MPO or an LC connector?
This module uses a Duplex LC connector. Unlike parallel optics (like 40GBASE-SR4) that require an MPO connector for multiple fiber strands, this LR4L module has a built-in optical multiplexer and demultiplexer (MUX/DEMUX) that combines the four optical lanes onto a single pair of fibers (one for transmitting, one for receiving).
4. Does the WSP-Q40GLR4L support 4x10G breakout mode?
No, it does not. The 40GBASE-LR4 and LR4L standards are designed for a native 40G point-to-point connection over a duplex fiber pair. They cannot be split into four separate 10G links. Breakout functionality is a feature of parallel optics modules like 40GBASE-SR4 and 40GBASE-CSR4.
5. Will using this compatible WSP-Q40GLR4L void my Cisco equipment warranty?
No. Using third-party, MSA-compliant transceivers will not void your network equipment’s warranty. Antitrust laws, such as the Magnuson-Moss Warranty Act in the US, protect consumers’ rights to use third-party hardware. Our modules are built to the exact same specifications as OEM parts and will not damage your equipment.
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