User`s guide

Call-Back Configuration for the CR800/CR1000 – MultiLogger Application Note #19 – Page 7 of 12
Connect String Configuration Guidelines
In the ModemCallBack instruction used for dialing the modem the Connect String provides for identifying
when a connection is established between modems. When using the Campbell modems it is generally not
required to configure this string, however when using the ComRS232 option with third-party modems it
generally is required to include the actual modem response. This is usually “CONNECT” followed by the
baud rate of the connection, e.g. “CONNECT 9600”. The easiest way to test the modem connect string is
to use the computers internal modem and use Windows Hyperterminal to manually dial the modem and
view the modem connect response. Alternately connect the modem to be used at the datalogger directly
to the computer via a COM port. In either case you will need a modem connected to the datalogger for
answering the call.
Hyperterminal is a general purpose communications program, the shortcut is usually found in the Start |
Programs | Accessories | Communications group.
When starting
Hyperterminal you will first
be prompted to name the
connection. Use the COM
port number followed by
the baud rate to be used
for communicating with the
modem. Use Phone and
Modem Options in your
Control Panel to determine
which COM port is
assigned to the modem
you are using.
Optionally an icon can be
customized for the
connection. The name and
icon will be helpful for re-
using the connection in the
future.
Press OK once the name and icon are configured.
You will now select the
connection method, i.e. the
port on the computer for
connecting to the modem.
Use the Connect using
drop-down to select the
appropriate COM port.
The example shows COM1
however the actual
selection on your computer
will depend on which port
you are connected to.
Press OK once the
Connect using is
configured.