Greetings RBNUG -

I think I have a problem. Don't have the hardware yet to check it out 
and I hope that someone else may have encountered this.

My application can use multiple serial ports. They connect to radio 
modems. The only way I have of identifying where a data stream is to go 
to is by the serial port "name". That is, the radio modems have no self 
identification.

Here is what I am worried about:

User assigns one USB serial port to a particular modem and another USB 
serial port (of the same manufacturer type) to another modem.

All is fine, system works, user unhooks USB serial ports from computer 
(maybe because some other USB device has to be plugged in). Then, when 
the USB serial ports are reconnected to the computer, they are plugged 
into different USB ports or to the same USB ports in a different order 
(or perhaps even a hub when they were originally connected directly to 
the computer previously).

What I am concerned with is the possibility that one physical USB 
serial port may have a different "name" than it did the first time.

I hope this makes sense. Has anyone encountered a situation like this 
and willing to share observations?

Many thanks
Jim Wagner

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