Adtran 1200037L2 DSU III DBU

Overview
The Adtran DSU III DBU (part number 1200037L2) is a high performance digital signal processing unit designed for carrier grade networks. It provides robust, low latency conversion and conditioning of digital signals, enabling seamless integration of legacy T1/E1 lines with modern Ethernet and IP based transport. This compact, rack-mountable module delivers reliable operation in harsh telecom environments while simplifying network architecture and reducing overall equipment cost.

Key Features

• Supports both T1 (DS1) and E1 (DS0) framing formats
• Full duplex operation with independent transmit and receive paths
• Integrated line monitoring and alarm detection
• Auto-negotiation of line rate and coding scheme
• Low power consumption and heat generation
• Plug-in design for easy installation in Adtran chassis
• Compliant with ITU-T G.703, G.704 and ANSI T1.403 standards

Technical Specifications

• Model: DSU III DBU (1200037L2)
• Form factor: 1U rack-mount module
• Supported data rates: 1.544 Mbps (T1) and 2.048 Mbps (E1)
• Input impedance: 75 ohms
• Output impedance: 75 ohms
• Operating temperature range: 0 to 55 degrees Celsius
• Power supply: 48 VDC, 0.5 A max
• Interface: RJ-48C connectors for T1/E1, RJ-45 for Ethernet management
• Alarm signals: LOS, LOF, AIS, RAI, CRC errors

Applications
The DSU III DBU is ideal for service provider backbones, enterprise WAN links, and data center interconnects where legacy T1/E1 circuits must be bridged to modern IP networks. It is commonly deployed in:

• Metro Ethernet aggregation points
• Voice over IP gateways
• Remote office connectivity
• Network management and monitoring stations
• Telecom carrier edge routers and switches

By delivering reliable digital signal conversion with built-in monitoring, the Adtran DSU III DBU helps you maintain high availability, simplify network design, and protect critical communications infrastructure.