Problem with direct connection using modems (ultrix 3.1)

[George Robbins]

In article <1379 at beaudin.UUCP> john at beaudin.UUCP (John Beaudin) writes:
> My 2 nodes are connected with a dedicated phone line - when the modem 
> goes offhook, ringing occurs, no number necessary. The setup string sent
> to the modem therefore is 'atd'.
> 
> Is this kind of connection supposed to be 2-way? DEC customer support
> says only outgoing is possible.

2-way support - aka "shared lines" requires that the modem or other connection
support something like DTR and CD, since the outgoing connection is only
supposed to take over an "idle" line.   In your case, you should be able to
configure you modems appropriately, but it isn't possible to do this with a
simple passive "null modem" type of direct connect.

-- 
George Robbins - now working for,     uucp:   {uunet|pyramid|rutgers}!cbmvax!grr
but no way officially representing:   domain: grr at cbmvax.commodore.com
Commodore, Engineering Department     phone:  215-431-9349 (only by moonlite)