Specifications

Table Of Contents
Niagara Release 2.3
Revised: May 22, 2002 Niagara Networking & Connectivity Guide
Chapter 4 Connecting with Direct Dial
Configuring Direct Dial on the JACE-4/5
4–10
Settings made via AT commands are automatically reused by the modem until
another command is received to change them, or the modem is turned off. The
commands in the initialization string are used to set the parameters on startup.
Enabling the
JACE-4 Modem
(Internal or
External)
The JACE-4 has two serial ports (one RS-232 and one RS-485) and one optional
on-board 56k modem. However, only two of these three serial channels can be active
at any one time. By default, the serial ports are enabled rather than the modem. When
shipped, COM1 is assigned to the RS232 port and COM2 is assigned to the RS485
port. If you use an external modem, you can leave the RS-232 port at COM1, or
reconfigure it to be COM2. Changes to these assignments can be made using the
release 2.3 of the Admin Tool.
If you have purchased the internal modem and want to enable it, you must enable the
modem in the place of one of the two serial ports. The internal modem must be
assigned to COM2.
You can choose from one of the following options for configuring your serial ports:
Use the following steps to configure the serial ports.
Procedure 4-1 Configuring JACE-4 serial ports.
Step 1
Open release 2.3 of the Admin Tool and connect to the JACE-4.
Step 2
Click the Network Settings tab.
Step 3
On the Network Settings tab, click Edit Port Properties.
Notes If you cannot see the Port Properties button, maximize the Admin Tool
window. If you are using the Admin Tool within the JDE, you may also have
to contract the left pane to see the button.
The Port Properties button is available in Niagara release 2.3 or later. If you
are not running release 2.3 on your PC, then either upgrade to that release or
contact Systems Engineering for information on how to update the file.
The port.properties file opens in a text editor (see Figure 4-4).
Table 5 Serial port configuration options.
Option 1 (default)
COM1=232
COM2=485
Option 2
COM1=232
COM2=MODEM
Option 3
COM1=485
COM2=MODEM