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Hardware Installation
Modem Configuration
2.3 Modem Configuration
2.3.1 Configuring a VT‐MODEM‐4
All VT-MODEM models are factory configured to use the default communication settings for Sixnet Stations. If a
VT-MODEM-4 is connected to a PLC, PC or other non-Sixnet device, then it may be necessary to reconfigure the
modem. To modify these parameters use the VT-MODEM Setup Wizard (v2.00 or later) located at
www.redlion.net/resources/software/sixnet-software/automation-devices-software-firmware. The parameters can
also be modified using a Windows
2.3.1.1 AT Command String At Power‐up
Upon power-up, a Sixnet station can send a command string to a VT-MODEM-4. This capability can be used to
assure that the modem is set to a particular mode of operation, such as auto answer mode. Refer to the "Setting
Modem String" topic in the Sixnet I/O Tool Kit program's online help for information on this capability. The Sixnet
Station can send any standard AT command.
2.3.2 Configuring a VT‐MODEM‐4 as an External Modem on a PC
The VT-MODEM-4 can be connected directly to a PC. The modem will need to be installed in Windows prior to use.
Here are instructions to install the modem in most Windows Operating Systems.
2.3.2.1 Modem Installation in Windows® 10
1. Connect the DC power, communications cable (VT-CABLE-MDM or equivalent) and telephone line as
described above.
2. In the search box next to the Windows button type "Phone and Modem" and select the Phone and Modem in
Control Panel.
3. In the Modems tab, click the "Add" button. Do not select the "Don't detect my modem, I will select it from a
list". Instead, click Next and allow Windows to search the com ports and detect the modem.
4. Windows should find a modem called Standard Modem. Click Next and Windows will complete installation of
the Standard Modem. (Alternatively, click Change and select "Standard Modem Types" from the Manufactur-
ers list, and "Standard 28800 bps Modem" from the Models list.)
5. To verify that the modem has been installed, go to the "Phone and Modems" in Control Panel, then go to the
"modems" tab. The modem should be listed as either a "Standard Modem" or a "Standard 28800 bps Modem"
depending on the steps followed above.
6. Upon re-booting the machine, Windows may still find the VT-MODEM-4 as new hardware. If this happens,
select "Do not install a driver (Windows will not prompt again)".
2.3.2.2 Modem Installation in Windows® 7
1. Select Start
Control Panel, and then double click the Phone and Modems icon.
2. In the Modems tab, click the "Add" button. Do not select the "Don't detect my modem, I will select it from a
list". Instead, click Next and allow Windows to search the com ports and detect the modem.
3. Windows should find a modem called Standard Modem. Click Next and Windows will complete installation of
the Standard Modem. (Alternatively, click Change and select "Standard Modem Types" from the Manufactur-
ers list, and "Standard 28800 bps Modem" from the Models list.)
VT-MODEM-4 Hardware Guide
®
terminal program.
Revised 2018-12-10
Drawing No. LP1087-A
2-9
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