Adding A Dpm8 (Digital Port Module - 8 Port) - Comdial DX-80 Installation & Maintenance Manual

Adding a DPM8 (Digital Port Module – 8 port)
Two DPM8 (Digital Port Module, 8-port) modules can be added to each KSU of the DX-80 system. These modules
expand the DX-80 system extension capacity to a maximum of 24 digital ports in each KSU (48 total digital ports).
DPM8's are installed by connection to the 408M/E via the Extension Expansion module connectors ("J2" and "J3.")
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 and DPM8 modules may be connected to the system via these two connectors.)
DPM8's are installed using four (4), 2.0 cm brass color standoffs included with the DPM8 module.
DPM8 Extension Number Matrix Per Installed Location
KSU Connector Used
J2 Extension Expansion
J3 Extension Expansion
DPM8 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. Remove the DPM8 module from the packaging and locate the four brass-color standoffs packaged 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, it is recommended that they be installed closest to the 408M/E. That is, if
P7290 IMM
DX-80 I
NSTALLATION AND
DPM8
DPM8
Extension Numbers in
109,110,111,112,
113,114,115,116
117,118,119,120,
121,122,123,124
M M
AINTENANCE ANUAL
J2 J3
Extension Numbers in
KSU1
133,134,135,136,
137,138,139,140
141,142,143,144,
145,146,147,148
2-9
KSU2