> 
> I believe there was a time when the Apple recommended Hardware Handshake 
> cable had CTS tied to DTR, and some modem companies still deliver this 
> configuration.  US Robotics is one I think.  The current Apple 
> recommended Hardware Handshake cable has RTS tied to DTR, and this is the 
> cable you'll most likely get from places like Best Buy, Compu USA and 
> most modem manufacturers.  In an ideal world one signal is used for 
> in-bound flow control and the other is used for out-bound flow control.  
> As Dave says, the Mac can only support one, not both. And just like Dave 
> I can't remember if RTS is in-bound or out-bound, but disabling DTR might 
> just solve you disconnection problem.

If the problem is disconnections because the modem is seeing DTR transitions
and hanging up, another option is to just use crtscts. Then DTR won't
get twiddled for flow control.

I talk to a 14.4 modem at 38400 on a IIsi using the NCR driver, and I don't
get overruns. So it can work.

Take care,

Bill