Code: MSGB202$0500.doc 18/06/2004 P. 20 / 20
3. System
connection
•
Connect the DMK-side modem to the RS232/RS485 interface converter using 51C9 cable.
•
Connect the RS232/RS485 interface converter to the DMK network using a shielded twisted pair cable
(see wiring diagram in the following page).
•
Connect the second modem to the PC with the standard cable provided with the modem. The PC-side
modem does not require any particular programming (it must be left at factory defaults).
•
Connect both modems to the respective telephone lines. For the first tests you are advised to use two
internal lines in the same office to keep the call under control.
4. Configuration of the DMKLOG program
•
Start the DMKLOG program from the PC with the modem already connected and powered.
•
Choose the
Configuration-Options
menu
•
Set the
Connection via modem
box from the
General
table.
•
If the
Modem Index
table is empty, enter a record with the name of the installation and the phone
number corresponding with the telephone line of the modem connected to the DMK.
•
Click on
OK
to close and save the
Options
window.
5. Online
Connection
•
Choose
Call with modem
from the
Communication
menu
•
From the pull-down box choose the name of the installation to be called. The corresponding telephone
number (previously loaded in the
Modem index
) will be shown in the box below.
•
Click on
Dial
•
At this point, the modem at the PC end calls the DMK modem. After a few rings the DMK modem and
the program switch automatically to the online mode.
•
To end the connection, choose
Modem-Hang up
from the
Communication
menu
In the event of problems…
If during the attempted call the modem connected to the DMK does not ‘ring’, this means that the call fails to
reach its destination. In this case, carry out the following checks:
•
Try dialing the telephone number of the line to which the DMK is connected using a normal telephone.
The modem called should give off sounds that ought to be heard in the handset. If this does not happen,
there are problems on the telephone line or on the switchboard.
•
Check that PC modem is powered and connected with the cable to the correct serial port (the one set in
Communication-Serial port
)
If the modem called rings repeatedly but the connection fails to be established
•
Check the DMK programming (in particular about auto-answer, see previous point 2)
•
Check modem programming (in particular about auto-answer, see previous point 2)
•
Check the integrity and the polarity of DMK-Converter RS-485 twisted-pair cable
•
Check the integrity of modem-converter cable 51C9
•
Check if when the phone rings, the yellow LED on the interface converter blinks briefly. This means that
the modem is sending the RING message to the converter and this is sending the message to the
DMKs.
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