Specifications

DX-80 INSTALLATION AND MAINTENANCE MANUAL
P7290 IMM 2-12
CO Line Directory Number Matrix Per Installed Location
408M in KSU1
SLOT 1
COM4 in KSU1
SLOT 5
408E in KSU2
SLOT 1
COM4 in KSU2
SLOT 5
740,741,742,743 744,745,746,747 748,749,750,751 752,753,754,755
COM4 Installation Procedure
1. Be sure that the entire system is turned off.
2. Remove the KSU cover (four screws at each corner).
3. Connect grounded wrist strap to a suitable earth ground. (If a grounded wrist strap is not available, bleed
any static charge from your body before touching circuit modules by touching the gold-painted surface of the
inside of the KSU cabinet. If the KSU is properly grounded this will momentarily discharge static electricity
from your body. NOTE: A GROUNDED WRIST STRAP IS THE ONLY METHOD OF ASSURING THAT
STATIC ELECTRICITY DOES NOT DAMAGE CIRCUIT MODULES.)
4. We recommend installing the COM4 closest to the 408M/E. This means that the CPM must be temporarily
removed then repositioned above the COM4 once it is installed (in KSU1). For KSU2 installation skip step 5
and proceed with step 6.
5. Remove the installed CPM by removing the four brass standoffs used to secure the board. Retain these
standoffs for later use. Remove the ribbon cable that connects the CPM to the 408M then set aside.
6. Remove the COM4 module from the packaging and locate the four brass-color standoffs packaged with the
module.
7. Position the COM4 over the 408M/E (right-hand side) where the CPM was just removed (KSU1).
8. Use the four brass-color standoffs supplied with the COM4 to secure the COM4 in position.
408M
COM4
CPM