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Async-232 Module Submenus
Configuration
61200182L1-1
when DTR is dropped. If the call does not connect, the call will continue to be
retried as long as DTR remains active.
AT Dial
When enabled, AT commands may be used to dial outgoing calls. Port and
allocated modem or ISDN resource configuration is also supported via AT
commands. The DTR signal must be active from the DTE to dial out. The call
is hung up when DTR is dropped or when the escape-to command mode
sequence (+++) and ATH are issued. When the call is connected, the Async-
232 Module port enables DCD.
DTR Dial Number
This field is only active when outgoing calls are enabled and Dialout Method
is set to DTR Dial. If a phone number is entered here, it will be dialed when
DTR goes active.
Callout Protocol
This field determines what type of resource will be allocated and the data pro-
tocol that will be used for an outgoing call attempt for the port. The follow-
ing selections are available:
Analog
An outgoing call attempts to allocate a modem resource and make
Modem
an analog call. Asynchronous data is passed unmodified between
the Async-232 Module port and the allocated modem. The analog
modem resource is freed when the call is hungup.
ISDN PPP
An outgoing call attempts to allocate an ISDN resource and make a
digital call. Both ends of the call must be using PPP as the protocol
to communicate across the link. The Async-232 Module port per-
forms PPP Async-to-Sync conversion between the asynchronous DCE
port and the synchronous ISDN link. This conversion is the standard
method of transporting PPP frames available in ISDN Terminal
Adapters from ADTRAN and other manufacturers. The PPP Async-to-
Sync protocol complies with the Internet Engineering Task Force
(IETF) RFC 1662. For the ISDN call to be routed outside ATLAS, a
PRI or BRI interface must be connected to the system and be cor-
rectly configured.
Out ISDN Call Type
When Callout Protocol has been set to ISDN PPP, this field determines what
type of ISDN call will be made when a call is attempted. The value must
match the network services provisioned for the PRI or BRI interface that the
call will be carried on. This field is not present and ignored when the Callout
Protocol is Analog Modem.
Async-232 Module User Manual
Chapter 3. Operation
3-13
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