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Chapter 3. Operation
In Ctrl (Incoming Call Control)
Write security: 3; Read security: 5
Selects the method by which incoming calls are indicated to and controlled by the
DTE. Options include DTR-DCD and AT Cmds.
Dialout (Dialout Cfg)
Write security: 3; Read security: 5
Includes all options that affect dialing outgoing calls. The record field indicates
the values of the key dialout subfields.
Dialout Method
Write security: 3; Read security: 5
Selects the method by which outgoing calls may be initiated by the DTE.
3-12
In & Out
Connected DTE answers incoming calls and initiates outgoing calls through
this port.
DTR-DCD
An activated data carrier detect (DCD) signal indicates that an incoming call
is answered from the Async-232 Module port. Upon call hang-up, the DCD
becomes inactive. The data terminal ready (DTR) signal must be active from
the DTE for an incoming call to be answered. If the port is part of a group
assigned in the Dial Plan, then the first idle port with DTR active will answer
the call. If the DTE drives DTR inactive, the Async-232 Module port hangs
up an active call.
AT Cmds (AT Commands)
AT commands and responses indicate and control calls. AT commands also
support port and allocated modem or ISDN resource configuration. A con-
nected call may be hung up by issuing the escape-to command mode
sequence (+++) and ATH. DCD is still sourced and DTR monitored as above.
Calls are automatically answered by default. If required, auto-answer can be
disabled and the DTE can manually answer incoming calls. Simply, set this
field to AT Cmds and issue ATS0=0 from the DTE. The Async-232 Module
port toggles the RI signal and issues RING message strings when it detects an
incoming call. The DTE may answer the call by sending an ATA command
(see Appendix B, AT Commands).
AT/MDM
Indicates that AT dialing of a modem is selected.
DTR/MDM
Indicates that DTR dialing of a modem is selected.
AT/ISDN
Indicates that AT dialing of an ISDN resource is selected.
DTR/ISDN
Indicates that DTR dialing of an ISDN resource is selected.
DTR Dial
When DTR is enabled by the DTE and a number has been entered in the DTR
Dial Number field, an outgoing call attempt is made. The call is hung up
Async-232 Module User Manual
Async-232 Module Submenus
Configuration
61200182L1-1
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