1. Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of the 10GTEK 25G SFP28 SFP+ Transceiver. This optical module is designed for high-speed data transmission in networking environments, offering reliable connectivity over singlemode fiber.
2. Product Features
- Data Rate: 25Gb/s
- Interface: Dual LC connectors
- Reach: Up to 10 km
- Fiber Type: Dual LC OS2 singlemode fiber
- Compatibility: Compatible with Cisco SFP-25G-LR-S and other major brands.
- Digital Diagnostic Monitoring (DDM): Real-time monitoring of critical parameters.
- Hot-Pluggable: Supports plug-and-play functionality with ESD protection.
3. Specifications
| Parameter | Value |
|---|---|
| Model Number | AZS13-S28-10(Cisco-1pc) |
| Data Rate | 25 Gb/s |
| Wavelength | 1310 nm |
| Max Reach | 10 km |
| Fiber Type | Dual LC OS2 Singlemode Fiber |
| Power Consumption | ≤1.5W |
| Operating Temperature | 0°C to 70°C |
| Dimensions | 3.7 x 1.38 x 0.75 inches |
| Weight | 1.45 ounces |
4. Setup and Installation
The 10GTEK 25G SFP28 SFP+ Transceiver is designed for easy installation due to its hot-pluggable nature.
- Preparation: Ensure the host device (e.g., network switch, NIC) has a compatible SFP28 port. Handle the transceiver with care, avoiding static discharge.
- Insertion: Gently insert the SFP28 transceiver into the designated SFP28 port on your network device until it clicks into place. The module is designed for plug-and-play operation.
- Fiber Connection: Connect a Dual LC OS2 singlemode fiber optic cable to the duplex LC connectors on the transceiver. Ensure the fiber ends are clean before connection.
- Verification: Once connected, verify the link status indicators on your network device. A stable link light indicates successful connection.

Figure 4.1: The 10GTEK 25G SFP28 SFP+ Transceiver module, showing its compact design and LC connectors.

Figure 4.2: Illustration of the transceiver being installed into a network switch, demonstrating its easy plug-and-play functionality.

Figure 4.3: Diagram illustrating a typical 25G transceiver application, connecting two 25G switches via SFP28 transceivers and dual LC fiber.
5. Operating Principles
The 10GTEK 25G SFP28 SFP+ Transceiver operates by converting electrical signals to optical signals for transmission over fiber optic cables and vice-versa. It supports a 25 Gigabit Ethernet link over singlemode fiber up to 10 kilometers.
5.1 Digital Diagnostic Monitoring (DDM)
The transceiver incorporates Digital Diagnostic Monitoring (DDM) functionality, allowing real-time access to critical operating parameters. This feature enables network administrators to monitor the performance of the transceiver and identify potential issues proactively.
- Temperature: Monitors the internal temperature of the module.
- RX Power: Measures the received optical power.
- TX Power: Measures the transmitted optical power.
- Voltage: Monitors the supply voltage to the module.
- Bias Current: Monitors the laser bias current.

Figure 5.1: Diagram illustrating the parameters monitored by Digital Diagnostic Monitoring (DDM).
6. Maintenance
Proper maintenance ensures the longevity and optimal performance of your 10GTEK SFP28 transceiver.
- Cleanliness: Always ensure fiber optic connectors are clean before insertion. Dust and contaminants can significantly degrade optical performance. Use appropriate fiber cleaning tools.
- Handling: Handle the transceiver by its metal casing. Avoid touching the optical interfaces or electrical contacts.
- Storage: When not in use, store the transceiver with its protective dust caps in place in a clean, dry environment.
- Environmental Conditions: Operate the transceiver within the specified temperature range (0°C to 70°C) to prevent damage and ensure stable operation.
7. Troubleshooting
This section provides guidance for common issues encountered with optical transceivers.
| Problem | Possible Cause | Solution |
|---|---|---|
| No Link Light / Link Down |
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| Poor Performance / Low Throughput |
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| Intermittent Connectivity |
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For further assistance, please refer to the support section or contact 10Gtek technical support.
8. Warranty and Support
10Gtek products are manufactured under strict quality control and are 100% tested before shipment to ensure reliability and performance.
For technical support, product information, or warranty inquiries, please visit the official 10Gtek support website:
You can also find more information about 10Gtek's product range and company details on their Amazon Brand Store.