ADTRAN Total Access 3000 System Manual page 39

Built-in protection switching in the 1181411L5 H4TU-C allows a service provider to
provision an HDSL4 circuit with a hot-standby for redundancy in both of the HDSL4
line cards and loops. The 1181411L4 H4TU-C does not contain built-in protection
switching.
The H4TU-C incorporates these features:
• Converts standard bipolar DSX-1 signals to/from HDSL4 signals
• Operates in Total Access 3000/3010 multiplexer applications
• Offers built-in automatic protection switching for redundancy (1181411L5
only)
• Span powers H4TU-R and up to two H4R repeaters for T1 service
• Provides comprehensive circuit maintenance information
• Supports multiple loopbacks for circuit diagnostics
The faceplate LED indicators include:
• STAT
• DLOS
• RLOS
• HLOS
• DSL 1/DSL 2
• HCRC 1/HCRC 2
• ARM / LBK
• B8ZS
Other faceplate features include:
• DSX-1 bantam jacks
• Separate "PROTection" LED for HLSS
®
Total Access 3000/3010 System Manual
6TASYS101-1E
TOTAL ACCESS 3000/3010
© 2003, ADTRAN, Inc.
SYS-101
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