61223HDSL2L2-5B B-1
Appendix B
HDSL2 Features
HDSL NEW ENHANCED FEATURE OVERVIEW
The new HDSL2 and HDSL4 products contain new features to enhance their performance and
help the customer reduce down time. The following features are described in this appendix:
• “TScan” on page 1
• “Splice Detection Feature” on page 2
• “Fault (GFI, Short) Bridging” on page 9
• “Fast Retrain Feature” on page 10
TScan
This unit is equipped to support the TScan™ feature, which provides data retrieval and
diagnostic capabilities for remote management of DS1 circuits. TScan allows provisioning,
performance, and event history information to be retrieved by the test center via the Facility
Data Link (FDL). In addition, TScan can be used to determine the nature and location of faults
on DS1 trouble circuits. TScan is accessible only through the remote test center.
TScan is a patent-pending, single-ended, diagnostic routine residing on a host server at the
central test facility that issues commands and retrieves data via FDL from the H2TU-C.
TScan performs the following functions (see Figure B-1):
• Detection and location of an open on one or both conductors
• Detection and location of a short between Tip and Ring
• Detection and location of a ground fault from either or both conductors
• Detection of foreign voltage
• H2TU-C Self Diagnostics
• Remote detection of the presence or absence of a ground connection in the remote mount
Use TScan to integrate these capabilities across multiple computing platforms with existing
operating systems.
