Adding An Mdm (Modem Module) - Comdial DX-80 Installation And Maintenance Manual

9. Connect the COM4 ribbon cable from the 408M/E to the COM4 connector. Press firmly (but not forcefully)
on the connector to secure a good connection. For KSU2 installation, skip step 10 and proceed to step 11.
10. Reposition the CPM over the installed COM4 and secure using the four brass-color standoffs removed in
step 4.
11. Make cable/wiring connections to the 4 CO Line ports as required.
NOTE:
12. Replace the KSU cover and secure with cover screws.
13. Restore KSU power.

Adding an MDM (Modem Module)

One MDM (Modem Module) can be added to KSU1. The Modem Module will allow remote access to
the DX-80 telephony system database and Maintenance functions using the PC-DBA utility. (The MDM
does not provide access to the DX-80 DX-SO Voice Mail/AA.)
At default the MDM directory number is "199." To establish a connection to the
MDM remotely, call into the system (where the MDM is installed) from the
remote site using PC-DBA. Ask to be transferred to extension 199. When
modem tone is heard, initiate any required keystrokes to link the modems.
Then proceed with usual PC-DBA connection routines (see Database
Administration – via PC-DBA).
The MDM is installed onto designated connectors located on the CPM.
MDM Installation Procedure
1. Be sure that the entire system (KSU 1&2) 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. Locate the CPM at the right-hand side of KSU1 above the 408M
(and COM4 if installed).
5. Position the MDM over the CPM-MDM connectors as illustrated in the diagram above.
6. Press firmly (but not forcefully) on the MDM to secure a good connection into the CPM-MDM connectors.
7. Replace the KSU cover and secure with cover screws.
8. Restore KSU power.
P7290 IMM
DX-80 I
NSTALLATION AND
The FCC requires that wiring of CO Lines into a Key Service Unit be separated from
wiring of station apparatus into a Key Service Unit. Therefore the installer must use a
separate cable for wiring of stations and CO Lines.
2-13
M M
AINTENANCE ANUAL
MDM
CPM