6TASYS101-1E
TOTAL ACCESS 3000/3010
SYS-101
Page 29 of 46
Total Access
®
3000/3010 System Manual
© 2003, ADTRAN, Inc.
Built-in protection switching in the 118112L5 H2TU-C allows a service provider to
provision an HDSL2 circuit with a hot-standby for redundancy in both of the HDSL2
line cards and loops. The 1181112L4 H2TU-C does not contain built-in protection
switching.
The H2TU-C incorporates these features:
• Converts standard bipolar DSX-1 signals to/from HDSL2 signals
• Operates in Total Access 3000/3010 multiplexer applications
• Offers built-in automatic protection switching for redundancy (1181112L5
only)
• Span powers H2TU-R and H2R repeater for T1 service out to 24kft
• Provides comprehensive circuit maintenance information
• Supports multiple loopbacks for circuit diagnostics
The faceplate LED indicators include:
• STAT
• DLOS
• RLOS
• HLOS
• DSL
• HCRC
• ARM / LBK
• B8ZS
Other faceplate features include:
• DSX-1 bantam jacks
• Automatic Protection Switching (HLSS) pushbutton
• Separate “PROTection” LED for HLSS
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