Farallon Communications 612 - Manual (Page 77)

Configuration using a Macintosh computer 5-13
CD Control. Use the CD (Carrier Detect) Control pop-up menu to
control how the modem handles the carrier signal. The available
options are Always On, On After Connect, and Temp Off At
Disconnect.
Always On. Carrier detect remains on at all times.
On After Connect. Carrier detect follows the state of the carrier from
the remote system. Carrier detect turns on when a connection is
established and turns off when the connection is terminated. In
most cases, you should choose this option unless your system
administrator or ISP tells you to specify one of the other options.
Temp Off at Disconnect. Carrier detect temporarily turns off and
then turns back on when you disconnect from a remote system.
DTR Control. The DTR (Data Terminal Ready) Control options define
how the modem handles DTR signals from your workstation. The
options are Ignore DTR from Host, Enter Command State, and Hang
Up.
Ignore DTR from Host. The modem ignores DTR signals from your
workstation. In most cases, you should choose this option unless
your system administrator or ISP tells you to specify one of the other
options.
Enter Command State. The Netopia ISDN Modem automatically
enters the command state (the state in which it responds to AT
commands) when it detects an on-off DTR transition.
Hang Up. The modem hangs up (disconnects from the remote
system) and then automatically enters the command state when
DTR changes from on to off.