How do you mean? Multiplex external UARTs I guess you mean.
You'd need a FIFO buffer of a reasonable size so you could ignore 1 line for
a period of time and not lose anything.

Can anyone suggest a suitable UART/FIFO for this task?

> How about analogue or digital multiplexers controlled by a PIC? (Plus
output
> buffers etc as required)
> Richard
<SNIP>
> > In summary my basic questions are:
> >     - Do either of these designs appear even slighly feasible?
> >     - Is there a better design?
> >     - Is interfacing a UART to a PIC
> > possible/difficult/processor intensive?
> >     - Is it possible to do 31250 on all UARTs? (Easily?)