CTEK Z4300U SkyRouter - Manual (Page 27)

22 September 2009
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Dial Mode Call Initiation - In dial mode, the PAD offers two standard methods for call initiation:
AT Command Initiated Dialing
DTR Controlled Dialing
Dial Mode Call Answering - In dial mode, the PAD offers two standard methods for call answering:
Auto Answer
AT Command Initiated Answer
Auto Dial (leased line) Mode - In auto dial (leased line) mode, the PAD provides auto-dial and auto-recovery facilities so
that a connection is always available. The PAD may be configured to auto-dial as many as four destinations. If a
connection cannot be established with one destination, the PAD will automatically attempt to connect with other
configured destinations. Auto dial mode may be configured so that is controlled by DTR to implement DTR dialing.
Selective Call Acceptance - In all modes, the TCP PAD may be configured to selectively accept or reject incoming calls. If
this feature is enabled, up to ten incoming IP addresses may be defined as acceptable.
Packet Forming – The TCP PAD accepts characters from the RS-232 interface and assembles them into an outbound
TCP message. The PAD provides a number of data management parameters for controlling the formation and
transmission of the TCP message.
TCP PAD CONTROL SIGNALS
The PAD uses the following RS-232 control signals:
Data Set Ready (DSR) Pin 6 – This output signal, sometimes known as Modem Ready, is controlled by the PAD. When
the PAD begins operating, DSR will be turned on. Please not that this only indicates that the PAD is operating. It does not
indicate that there is a data connection.
Data Carrier Detect (DCD) Pin 1 – This output signal is controlled by the PAD. When a TCP data connection has been
established, this signal will be turned on. When a data connection disconnects, this signal will be turned off.
Ring Indicator (RI) Pin 9 – This output signal is controlled by the PAD. It will toggle at a normal ring cadence if there is an
incoming call and the PAD is configured for an AT Command answer mode.
Data Terminal Ready (DTR) Pin 4 – This is an input signal. The PAD may be configured to either monitor or ignore this
signal. If the signal is being monitored, DTR must be on in order to establish a call. If a call is established and DTR is
turned off, the call will be terminated.
TCP PAD PARAMETER DETAIL – Before configuring the TCP PAD, be sure to review the RS-232 configuration screen
and ensure that you have selected the proper physical characteristics for the RS-232 hardware interface. Also ensure
that you have selected the TCP PAD as the service that will be connected to the RS-232 interface.
Call Setup Parameters
Answer Mode
AT Cmd – PAD accepts ATA command for acceptance of an incoming call.
Auto - Pad will automatically accept an incoming call
Dial Mode
AT Cmd – PAD accepts a variety of ATD command formats for establishment of an outbound call.