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152-402-145-02, Issue 2 Overview
H2TU-R-402 June 16, 2000 1
OVERVIEW
The HiGain
®
HDSL2 product family from ADC
®
is the industry’s first practical implementation of High-bit-rate
Digital Subscriber Line 2 (HDSL2). ADC products are fully compliant with the HDSL2 standard. Providing
full-rate T1 access using just a single copper pair, HDSL2 is a cost-effective solution that offers an open
architecture. The open architecture inherent in HDSL2 guarantees interoperability, allowing simple and economic
accommodation of network growth. HiGain HDSL2 uses the industry’s first HDSL2 chipset (ANSI T1/E1.4
compliant) developed by ADC.
HiGain HDSL2 products provide 1.552 Mbps transmission on one unconditioned copper pair over the full Carrier
Service Area (CSA) range. The CSA includes loops up to 12,000 feet of 24 American Wire Gauge (AWG) wire
or 9,000 feet of 26 AWG wire, including bridged taps.
FEATURES
The H2TU-R-402 List 4E remote unit is the customer side of a T1 transmission system.
• HDSL2 transmission features
– Lightning and power cross-protection on HDSL2 interfaces
– Full-duplex HDSL2 transmission on one pair at 1.552 Mbps
– Ultra-low wander (Stratum 1 compliant)
• Front-panel features
– HDSL and DS1 status LEDs
– Dual loopback control button
– DS1 access bridging jacks
– RS-232 craft port for connection to a maintenance terminal
• HiGain HDSL2 maintenance screens for inventory, provisioning, and troubleshooting
– High-performance, non-volatile performance monitoring
– Non-volatile alarm histories
– Performance Report Messaging (PRM) support for Supplemental PRM (SPRM) and Network PRM
(NPRM)
• System configuration options
– Selectable DS1 pre-equalizer
– Bipolar Violation Transparency (BPVT)
– Bit Error Rate (BER) alarm
– Remote provisioning
– Selectable loopback activation codes
• Digital Data Service (DDS) latching loopback
• Payload (PL) and HiGain (HG) loopback source identification
• Line or local power with sealing current option
• Metallic loopback self tests