Specifications

Installing the DX-80
50 Comdial October, ‘03
3. Connect a static discharge wrist strap to a suitable earth ground. Be sure that the strap is touch-
ing bare skin.
4. Remove the DPM8 module from the packaging and locate the four brass-color standoffs pack-
aged with the module.
5. Position the DPM8 over the left-hand side of the 408M/E and any other extension modules
already installed.
When installing DPM8 modules, Comdial recommends that you install them closest to the
408M/E. That is, if an APM4 module is installed move it outward (toward cabinet cover) and
install the add-on DPM8 first, then re-install the APM4. In the KSU extension modules are
always installed on the left-hand side.
6. Use the four brass-color standoffs supplied with the DPM8 to secure the DPM8 in position.
7. Connect the DPM8 ribbon cable to the 408M Extension Expansion Module Connector closest
to the DPM8. Press firmly (but not forcefully) on the connector to secure a good connection.
8. Make connections to the eight digital ports as required.
9. Replace the KSU cover and secure with cover screws.
10. Restore KSU power.
2.8 Adding an APM4
You can add one APM4 to KSU1 and two APM4’s to the KSU2. These modules expand the DX-80
system capacity to a maximum of eight analog ports in each KSU (16 total analog ports when used in
both KSU1 & KSU2).
When adding an APM4 to KSU1, connect to the 408M via an available Extension Expansion module
connector (either “J2” or “J3” but not both). These connectors have the logical system address of
SLOT 2 and SLOT 3 in both cabinet 1 (KSU1-408M) and cabinet 2 (KSU2-408E). APM4’s are
installed using four 2.5 cm nickel-color standoffs.
When adding APM4 modules to KSU2, you can install one on either of the Extension Expansion
module connectors, and one on the dedicated APM4 module connector. This connector has the logical
system address of SLOT 4 in both cabinet 1 (KSU1-408M) and cabinet 2 (KSU2-408E).
WARNING
Circuit boards are susceptible to damage caused by electrostatic
discharge. You must keep this in mind as you handle the circuit
boards. Refer to Comdial publication IMI01-005, Handling of Electrostatically
Sensitive Components, for details.
CAUTION
The FCC requires that wiring of CO lines into a KSU be separated
from wiring of station apparatus into a KSU. Therefore you must use
separate cables for wiring stations and CO lines.