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150-409-115-05, Issue 5 Overview
EDU-409 List 1 January 26, 2000 1
OVERVIEW
The HiGain
®
EDU-409 List 1 List 1 is a low-power doubler unit that extends
the range of a HiGain repeaterless G.703 transmission system. The doubler
units are installed between any doubler-compatible HiGain E1 Line Unit
(ELU) and HiGain E1 Doubler (EDU) or HiGain E1 Remote Unit (ERU).
They allow 2.048 Mbps transmission over twice the normal High Capacity
Digital Service (HCDS) range.
Adding a doubler can double the HCDS range to approximately 7.32 km
(24,000 feet) of 0.51-mm wire or 5.49 km (18,000 feet) of 0.4-mm wire loops.
Two doublers can triple the HCDS range to 10.97 km (36,000 feet) of
0.51-mm wire or to 8.22 km (27,000 feet) of 0.4-mm wire loops. Three
doublers extend the 0.51-mm wire range to 14.6 km (48,000 feet).
FEATURES
The EDU-409 List 1 includes:
• Occupation of one standard 239 T1 mechanics slot
• Power by any doubler-compatible HiGain line unit
• Front-panel status display LED
• Lightning and power-cross protection on both sides of the High bit-rate
Digital Subscriber Line (HDSL) interface
• Extremely low power dissipation
• Extremely low latency
• Compatibility with a 4-span line-powered circuit
• Minimal wander and jitter