Chances are cu is trying to write to the modem while it's not asserting 
carrier detect. Two solutions: configure your modem to assert this even 
when it hasn't got carrier to another modem, or put the softcar flag on 
tty00 in /etc/ttys.

Sorry, there's another solution. Use a program that doesn't care about 
CD. :) Kermit works nicely.

	- Joel Reicher

On Mon, 26 May 1997, Will Stoltenberg wrote:

> I'm trying to get ppp running to my ISP.  I tried
> cu -l tty00 in my attempt to find out why it isn't connecting, but I get
> cu: write: Input/output error
> However, pppd, when started, dials the modem and at least reaches the
> ISP's phone.  So the modem is there, and something can write to it, just
> not cu.  Anyone know what's going on?
> 
> 	Thank you, 
> 		Will
>