Coastcom D/I Mux III System

Chapter 3. Installation
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The Dual Standard DSX-1 Interface, Model 30118-101, or the Dual Enhanced DSX-1
Interface, Models 30118-102 and 30118-112, interconnect the incoming and outgoing T1
streams of the D/I Mux III. The units also provide signal conditioning to compensate for
the variations in cable lengths between the D/I Mux III and the DSX-1 cross-connect point
or T1 transmission equipment.
There are no switches for Model 30118-101; equalization is fixed for 150 ft or less.
On Models 30118-102 and 30118-122, switches SW1 and SW2 set equalization for the
following cable lengths: 0 - 150 ft, 150 - 450 ft, 450 - 750 ft.
The Dual DSX-1 Interfaces are "hardware only" cards and cannot communicate with D/I
Mux III control software. An installed Dual DSX-1 Interface will appear to the system
software as an empty card slot.
Note: Neither the standard nor the enhanced version of the DSX-1 Interface is designed
to be connected to outside plant T1 span lines. Model 30118-122 is configured
exclusively for use with the -24 V power supply possible damaging channel cards.
Select the cable equalization based on the distance to the DSX-1 cross-connect point, or
T1 transmission equipment. See Figure 3-23 for more information on the switch selection.
Figure 3-29. Dual Enhanced DSX-1 Interface (Front and Side Views)