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2-WIRE SHORT-RANGE DSL LINE DRIVER (HDSL) WITH 10BASE-T
5. Installation
When the HDSL Line Driver has been properly configured, it may be connected to
the DSL twisted-pair interface, the 10BASE-T Ethernet interface, and the power
source. Figure 5-1 shows the locations of these interface ports.
Figure 5-1. Rear panel.
5.1 Connecting the DSL Interface
The HDSL Line Driver supports communication between 10BASE-T hubs or
workstations at distances to 5 miles (8 km) over 24-AWG (0.5-mm) twisted-pair
wire. Two things are essential:
1. These units operate as a pair. Both units at the end of the twisted-pair DSL
span must be set for the same DTE rate.
2. To function properly, the HDSL Line Driver needs one twisted pair of
metallic wire. This twisted pair must be unconditioned, dry, metallic wire,
between 19 (0.9 mm) and 26 AWG (0.4 mm); the higher number gauges will
limit distance. Standard dial-up telephone circuits, leased circuits that run
through signal equalization equipment, or standard, flat modular telephone
type cable will not work!
The RJ-45 connector on the HDSL Line Driver’s twisted-pair interface is polarity
insensitive and is wired for a two-wire interface. The signal/pin relationships are
shown in Figure 5-2.
10BASE-T
interface
