1. Product Overview
The Digital Distribution Frame (DDF) is a core patching device in digital communication networks, primarily used for the transfer, routing, and testing of digital signals (e.g., 2Mbit/s, 34Mbit/s, 140Mbit/s) in PDH/SDH transmission systems. As the "nerve center" of digital communication networks, DDF plays a critical role in telecom equipment rooms, data centers, 5G base stations, and other scenarios.
2. Product Features
High-Reliability Design
Military-grade connectors with contact resistance ≤3mΩ
Supports 75Ω coaxial interfaces
Three-level lightning protection (8/20μs, 10kA)
Modular Architecture
Standard 19-inch rack mounting
Supports 1U/2U/4U heights
3. Technical Specifications
| Item | Parameter |
|---|---|
| Interface Type | BNC/SMB/RJ45 |
| Operating Frequency | 2MHz–155MHz |
| Insertion Loss | ≤0.5dB |
| Return Loss | ≥20dB |
| Operating Temperature | -40℃ to +70℃ |
| Protection Rating | IP20 (indoor type) |
