LTPH-UM-1031-03, Issue 3 Overview
H4TU-C-319 List 1 September 12, 2003 1
OVERVIEW
The H4TU-C-319 List 1 is the Central Office (CO) side of a T1 transmission system. The ADC
®
four-wire HDSL2
product family (hereafter referred to as “HDSL4”) is based on the HDSL4 standard ANSI T1.418 Issue 2.
The H4TU-C, when used with an H4TU-R remote unit, transmits a 1.544 Mbps payload up to a maximum distance
of 12 kft. over two unconditioned copper pairs. Using two doublers (H4Ds), the Carrier Service Area (CSA) reach
can be extended to a maximum of 34 kft. The H4TU-C-319 List 1 is designed to mount in 3192 mechanics shelves.
For a list of compatible shelves see “Appendix C - Compatibility” on page 65.
FEATURES
Standard features include:
• HDSL4 transmission features
— Lightning and power cross-protection on HDSL4 interfaces
— Full-duplex HDSL4 transmission on four wire at 1.568 Mbps
— Ultra-low wander (Stratum 1 compliant)
— Grounded loop detection on either HDSL4 spans
— Spectrum compatibility with Asymmetric Digital Subscriber Line (ADSL) services
— Bit Error Rate Tester (BERT)
— Three-span range with two doublers (34 kft, 26 AWG)
• Front-panel provisioning features
— Four-character status display
— DS1 splitting and bridging access
— Status Light Emitting Diode (LED)
— RS-232 craft port for connection to a maintenance terminal
— MODE and SEL pushbuttons
— Front-panel dual loopback commands
• Maintenance screens for inventory, provisioning, and troubleshooting
— DS1 and HDSL4 performance monitoring
— DS1 and HDSL4 alarm histories
— Payload (PL) and HDSL Generic (HG) loopback source identification
— Margin Alarm (MAL) threshold
— Report menu option for downloading status and performance monitoring data to a file
— Sources sealing current when connected to any locally powered H4TU-R-402
— Remote access and control of H4TU-R test signal generator
The H4TU-C-319 List 1 complies with the protection switching features of the PSC-606 List 1
protection switching card. See the PSC-606 List 1 technical practice, document number
LTPH-TP-1006-xx for detailed information.
