Tellabs 81.5512B-REV-I is a Group Controller Module (GCM) board used in the Tellabs TITAN 5500 digital cross-connect system. This module acts as a central control unit within the system, managing communication, synchronization, and control signaling across multiple port and interface modules.
The GCM is responsible for coordinating system operations and ensuring proper routing of digital traffic within carrier-grade telecom infrastructure. This part is typically deployed in central office environments and is commonly available as a refurbished or spare replacement board for maintenance and system upgrades.
✔ Confirmed as GCM module (4MB memory variant)
✔ Used in TITAN 5500 Group Controller architecture
Key Features
- Manufacturer: Tellabs
- Part Number: 81.5512B-REV-I
- Product Type: Group Controller Module (GCM) Board
- System Compatibility: Tellabs TITAN 5500
- Function: Central system control, communication, and synchronization
- Memory: 4MB (typical for GCM variants)
- Revision: REV-I
- Condition: Typically refurbished or surplus telecom inventory
Technical Specifications
- Module Type: Control / Processor board (GCM)
- Function: Manages system logic, signaling, and module coordination
- Integration: Installs in TITAN 5500 chassis backplane
- Deployment: Carrier and central office telecom environments
- System Role: Core controller for digital cross-connect operations
- Supports coordination of multiple port/interface modules
- Provides system timing, signaling, and management functions
- Field-Replaceable Unit (FRU) for maintenance and repair
- Designed for high-availability telecom systems
90 DAY'S
