CAT7200 converts changes in the RTS signal on a Virtual COM Port to ICOM CI-V PTT commands. It allows sound card based digital modem programs, such as the UZ7HO soundmodem, which do not support PTT via CAT commands to be used with ICOM radios with built in soiundcards. It was originally written for the ICOM 7200, but has also been tested with an ICOM 7100. The Program works in conjunction with the "User Mode Virtual Serial Port Driver" from the BPQ32 Node package.


The following instuctions refer to the IC7100, but apply to any ICOM radio with built in soundcard.

Download the required files from and unzip to a onvenient folder.

Create a virtual COM port.

Note that there are separate versions for 32bit and 64bit Windows, in the VCOM32 and VCOM64 subdirectories - make sure you install the right one.

For Installation on Windows XP, see intructions here.

To Install on a Windows 8 64 bit system you must reboot with advanced options to disable driver signature enforcement.

With Windows 7 and above, you should be able to install the driver by right clicking on InstallBPQVCOM.exe (or InstallBPQVCOM32.exe if 32 bit) and selecting "Run as Administrator". If that fails, the instructions for using the old method of installation are below.

For Installation on Windows 7+, see intructions here.

Use Device manager to identify the COM port numbers allocated to your 7100 and the Virtual COM Port. Run CAT7200. You should get a screen something like

Set the Applction Port to the Virtual COM Port. Set CAT Port to your IC7100 CAT COM port. Although normally the CAT port is the first port allocated to the 7100 one of my systems swapped them round, so the CAT port was the second. Set the CI-V Port to the value set in your 7100 (normally 88).

The software allows up to four programs to control the PTT - you only need to configure the first.

Click Open.

Configure your application to use the Virual COM Port, with RTS used for PTT

When the program transmits, the Green RX should be replaced with a red TX, and the rig should key.

When finished, close CAT7200.

Note that you need to configure the 7100 to take audio from the internal soundcard. Use the SET/CONNECTIONS Menu. There are two entries, DATA OFF MOD and DATA MOD. The first is used if the 7100 data mode is not set, and the second if it is. Each has four options MIC, ACC, MIC + ACC, USB. Select USB on the one you are using. I suggest you use the data mode (USB-D) for sound card modes. You can then leave the non-data mode config set to MIC for normal voice operation.

John Wiseman, G8BPQ
January 2014