Specifications

Introducing The DXP
DXP Correspondence Manual
Line Boards-Loop-start Line Board
The loop-start line board (DXPCO-LP8, LP4) supports loop start
lines, and it is available in either a four- or eight-port capacity. Each
loop-start line board has modular jacks that provide connections for
either four or eight lines. You can connect an industry-standard
telephone to the bottom jack to serve as a power-failure telephone. If
the DXP should lose power, the power-fail telephone will continue to
operate. The LED on the front of the board indicates when a line is in
use: off with a five-second blink rate on indicates that all lines are
idle; on with a five-second blink rate off indicates at least one busy
line. A rapid flash indicates a malfunctioning microprocessor on the
line board. Each loop-start board also has a power fail and auxiliary
interface. For more information on the loop start board, see
IMI66-085.
Line Boards-Multipurpose Line Board
The multipurpose line board (DXPCO-GDS, GD4) supports loop start
lines, ground start lines, or E and M tie lines. Like the loop start board,
the multipurpose board also is available in either a four- or eight-port
capacity, and you can use any combination of the three line types.
However, ports three and four on each multipurpose board are the
only ports that support E and M tie lines. The LED on the front of the
multipurpose board functions exactly like that on the loop start board;
each multipurpose board also has a power fail and auxiliary interface.
For more information on the multipurpose board, see IMI89-097.
I- 12 introducing The DXP