Article 154294 of comp.os.vms:
In article <1996Sep3.133837@lsl>, clarke@lsl.co.uk (Clarke Brunt) writes:
> We have an application which needs to perform serial communication
> with another computer over a null modem cable and using
> RTS/CTS flow control. We have no control over the other system,
> so we cannot change to some other flow control scheme.
> 
> For the port at our end, we have tried the 25-pin modem port at the
> back of a VaxStation 4000/60, or a 3100.
> 
> Flow control for transmission works fine - the VAX stops transmitting
> when the other end drops the CTS signal.
> 

No VMS dosn't do inbound flow control until you get to version 7.0 or 7.1. I
don't know if its documented buy you have to set TT3$M_RTS_FLOW in
ucb$l_devdepnd3.
                                Neill.
-- 
Neill Clift  neill@macro.demon.co.uk