You may have purchased a software package designed to work in conjunction with the Whozz Calling? unit. The software may have a built-in automatic search and find function. This routine will search all COM and IRQ numbers in an attempt to determine settings for the serial port with which the unit is connected. If an error message indicates that the software cannot communicate or “find’ the unit, you will need to run the Loopback Test to determine if there exists communication port conflicts within your computer. If your software requires a manual selection of the COM and/or IRQ settings, the Loopback Test is also helpful in determining these parameters.

The unit should be connected to the serial port, placed in a convenient location next to the computer, and your software installed. Permanent installation and phone line connections can be made once communications between the software and hardware is established. Plug in the power to the unit and run the software. Phone lines need not be connected at this time. The software will either communicate with the unit connected to the computer or display a message indicating no communication.

If a no communication error is indicated and your software has an automatic search function, it has tried to communicate with the unit using every combination or COM and IRQ numbers. The serial port is probably not configured correctly and chances are the COM port number and/or IRQ number defined for the serial port conflicts with another device such as an internal FAX/ modem. If an auto-search function is not performed within the software, the COM and/or IRQ numbers must be set manually. Enter different combinations of COM and/or IRQ numbers to establish communication. If unsuccessful, use the Loopback Test to help determine whether communication conflicts reside in your computer.

To determine whether a serial port is configured and working properly run HyperTerminal in Windows and Loopback test procedure below.