Westermo IDW-90 - Manual (Page 33)

33 6620-2200
… IDW-90 connected to IDW-90 with DTR signal call
ISDN
Network
Configure the units
AT&F0
AT&F1 Set the unit to factory default
AT&W Store default settings
Set up the connection – The dialling modem
AT**catab1=nnn Store the number of the remote modem in the automatic
calling table of IDW-90
AT**cdsr=0 Set DSR signal always high (if this signal is used to trig the
DTR)
AT**isdn=6 Activates automatic DTR dialling if DTR switches from low
(OFF) to high (ON).
AT**save Save settings
Switch DTR from OFF to ON The modem will now dial the phone number stored in the
first location of the automatic calling table
Set up the connection – The answering modem
ATA Enter the answer command when RING comes from the net-
work or set up ATS0=1 to auto answer on 1 RING signal
(or more than 1).
DTR
DSR
DCD
Relay
External
application
10 kohm
May be required in harsh environments