I have a Karel MS48 Telephone System and Karel CM48 V. 1.03 software to configure and manage it. The software is link to Switchborad system through Serial Interface and there is also a security plug on the parallel port (dongle).
The software runs under Windows 98 SE.
Everything has worked fine since, but recently after I changed the PC on which the software is installed I could not have a serial connection working. The software is behaving like there is no connection between the PC and the switchboard via serial Interface.
The serial interface of the new PC is working condition and functional with other peripherals and software, and the configuration is correct, exactly like in the older machine.
Of course as soon I re install the software in the older machine, everything works ok.
It seems like the serial interface of the older PC behave differently from the serial interface of newer PCs.
When I say older PC I mean PC up to Pentium III (I was using a old machine to manage this switchboard) and usually equipped with two serial interface on motherboard.
The new PCs I tried are Intel Pentium IV and AMD processor machines (I tried various machines) equipped with only one serial port on mother board.
I would appreciate if someone could have any idea of this problem and if there is a solution to it.
I cannot have a new version of this software since Karel Corporation is not represented anymore in Tunisia, the country where I work.