Overview
The ADC Kentrox 30-00606-00 Rev C T-SERV II is a proven Channel Service Unit (CSU) designed for enterprise and carrier-grade T1 network interfaces. This unit meets all FCC and carrier requirements for standard user-to-network connectivity, with transparent signal handling for both AMI/B8ZS and ESF/D4 enhanced T1 formats. The 77123-L2 model designation indicates a plug-in format compatible with ADC Kentrox shelf systems.
Key Features
- Bipolar Violation (BPV) Correction — maintains signal integrity across T1 links
- Line Build-Out (LBO) — adjusts signal level for optimal network performance
- Loop-Code Generator — enables fault isolation and loopback diagnostics
- Front-Panel LED Status Indicators — provides real-time monitoring of unit health and network status
- Test Jacks — allows technician access for in-service testing and troubleshooting
- Automatic Keep-Alive Signal Generation — ensures continuous link presence and network stability
- Dual Power Options — operates on both line power and local power configurations
Technical Specifications
- Manufacturer: ADC Kentrox
- Part Number: 30-00606-00 Rev C
- Model: 77123-L2
- Product Type: T1 Channel Service Unit (CSU)
- Interface: Standard T1 (1.544 Mbps)
- Format: Plug-in module (shelf-compatible)
- Signal Formats Supported: AMI, B8ZS, ESF, D4, SF (Super Frame)
- Status Display: Front-panel LED indicators
- Diagnostics: Built-in loop-code generator, test jacks
- Power Options: Line-powered or local-powered configuration
Typical Applications
- Telecommunications carrier network interfaces at customer premises
- Enterprise WAN termination and T1 link management
- Telecom equipment shelves and integrated CSU systems
- T1 signal conditioning and loopback testing for network diagnostics
- FCC-compliant network interface configurations for regulated environments
Compatibility & Replacements
Compatible With
- ADC Kentrox 77020 CSU Shelf system
- ADC Kentrox T-SERV II shelf modules and plug-in configurations
- Standard T1 telecommunications networks (AMI, B8ZS, ESF, D4 formats)
- FCC Part 68 carrier-compliant T1 interfaces
Replaces / Drop-In Replacement For
Verify compatibility with your system integrator before ordering. The 30-00606-00 Rev C is the specific revision; confirm revision level requirements with your installation documentation.
Works With
- ADC Kentrox T-SMART and T-SERV II interchangeable shelf modules
- Standard T1 CSU shelf systems from carrier equipment vendors
- Telecom technician test equipment and loopback diagnostics tools
- Network monitoring systems for T1 link performance analysis




