Using HDSL technology, the HCD-4 operates at rates of n x 64 kbps up to 4 Mbps over 4-wire lines.The HCD-4 extends the transmission range up to 3 km (1.9 miles) over 24 AWG (0.5 mm) 4-wire copper cable.HCD-4 compensates for line impairments, bridge taps and mixed cabling by using advanced equalization, adaptive filtering, echo cancellation technology and 2B1Q line coding. High immunity to background noise enables transmission of multiple HDSL lines via the same physical cable.Setup, control and monitoring of status and diagnostic information can be performed using one of the following:- front panel LCD with three pushbuttons, using menu-driven management- ASCII terminal connected to the async control port using command line interpreter Supporting a built-in Ethernet bridge or built-in IP router, the HCD-4 provides a cost-effective and easy-to-install solution for LAN-to-LAN applications. The HCD-4 supports V.35 and RS-530, enabling connection of digital equipment at 4 Mbps for corporate applications.HCD-4 is available as a standalone unit or can be mounted in a standard 19" rack using special hardware. Two HCD-4 units can be mounted side-by-side. 
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