3Com Courier, Reference

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16-10 C
HAPTER
16: D
EDICATED
/L
EASED
L
INE AND SYNCHRONOUS APPLICATIONS
Hanging Up Your modem remains online until the remote device disconnects, your
software causes the DTE to drop the Data Terminal Ready signal (DTR), or
you power off the modem. When one of these events occurs, the mode
returns to asynchronous Command mode.
Auto-Dialing
Because the Courier V.Everything modem will not accept commands
when it is in synchronous mode, you must configure it in asynchronous
mode before trying to connect to a synchronous network
Then you can set the Courier V.Everything modem to dial the remote
device at power-on, when it receives the DTR signal from your computer,
or when you press the Voice/Data switch.
Once the remote device answers, the Courier V.Everything mode
switches to synchronous mode and starts sending synchronous timing
signals to your computer
Configuring th
Courier V.Everything
Modem
1 If your communications software isn't running, load the program and
start Terminal mode (see your software user's guide for instructions).
2 Send
AT&F0B0&W
to the modem.
The device that you are calling should also be set to the equivalent of B0,
which tells it to use the ITU answer sequence.
3 Select a source of the synchronous timing signals. For example, send
AT&X0&W to select the Courier V.Everything modem as the source of the
synchronous transmit clock timing signals
.
For your modem to Command
The Courier V.Everything modem sends transmit clock
timing signals to the DTE over the serial interface. DTE rate
follows the connection rate.
AT&X0
(Default)
The DTE sends transmit clock timing signals to the Courier
V.Everything modem over the serial interface. Typical use:
multiplexed leased lines.
AT&X1