Manual

23-CML000293 Precidia Technologies Inc. F-1
Appendix F:MCC
Modem Connection Control is available with the Precidia’s Remote Access prod-
ucts. The iPocket232 is slightly different since it is a DCE device and drives the
DCD signal. When you choose
Modem as the method of Connection Control,
the iPocket232 behaves like a Hayes, or “universal” modem to the device
connected on its serial port. The connected serial device (DTE) receives the
expected modem replies when communicating with the iPocket232. For further
information on setting Modem Connection Control, see “Connection Control” on
page 27.
iPocket232 Modem Overview
AT commands direct a modem to dial, answer, hang-up, and perform many other
communication tasks. All commands listed, except A/ and +++, must be
preceded by AT, followed by a carriage return. You can include multiple
commands on a command line, as long as the command does not exceed 80 char-
acters when including the prefix and carriage return. Spaces are ignored.
Commands following a command that opens, or closes an active connection, are
ignored.
A Dial command (ATD) instructs the modem to attempt a connection to the spec-
ified IP address and port number, or, if none is specified, to the configured
Remote IP in the Serial Port Settings sub-menu.
An On-Line command (ATO) instructs the modem to return to its active connec-
tion. If there is no active connection, the modem attempts to establish one using
the configured Remote IP and Remote Port.
An Answer command (ATA) instructs the modem to listen on a specified port
number. If no port number is specified, the configured local port number is used.
If the local port is not set, the standard telnet port (23) is used.
The escape sequence (+++) causes the modem to return to command mode from
answer or dial states, keeping the active connection open. An on-off transmission
on the DTR line also causes the modem to return to command mode. In this case,
the active connection may be maintained or closed, depending on how AT&D2 is
defined.