Cpm (Central Processor Module) - Comdial DX-80 Technical Manual

DX-80 Installation & Maintenance
Figure 1-2 Power Supply
Voltage Selector Switch
Two fuses are equipped on the power supply board, one for AC input over-voltage protection and one
for DC output over-current protection. A main power switch is accessible when the KSU cover is in
place. In the event battery backup operation is desired the KSU power cord can be connected to a
external (ancillary) UPS (Uninterrupted Power Supply). It is your responsibility to match the battery
requirements/UPS requirement to the specific needs of the equipment owner.
To determine the battery requirement needs and UPS requirement, see Section 1.15, Specifications to
find the current draw and necessary Amp/Hour back up support that the battery/UPS must supply.

1.5 CPM (Central Processor Module)

The CPM module is equipped standard in KSU1. This board contains all circuitry required to control
the fully equipped DX-80. The system uses the CPM to perform all digital voice switching and call
processing data switching.
The CPM has one ribbon cable connector for connection to the KSU1 408M and five (5) connector
sockets for connection of the system built-in modem, voice processor, and second cabinet (KSU2).
Since the CPM comes installed inside of KSU1 the CPM ribbon cable is already in place and con-
nected to the KSU1-408M J5 socket. Assuming the orientation of the KSU1 cabinet is installed on the
wall; the two horizontal connector sockets in the upper right corner of the CPM are for the MDM
(Modem Module). The connector socket labeled "2nd Cabinet" is for connection to the KSU2-408E if
that expansion is required. The remaining two connector sockets on the CPM, one at the left side, the
other at the right side are for the voice processor solution. Note: The voice processor solution can be
any of three possible choices: AAM, 7271C, or 7270C.
October, '03 Comdial 17