Teletronics WINC2400C - Manual (Page 20)

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APPENDIX B : WINC 2400C Interface Status
The WINC 2400C interface status refers to the state of the RS-232 serial ports between the local
terminal or computer and the WINC 2400C. The state, in turn, is determined by the signal levels on
each of the signal lines that comprise that serial port. These status lines have been brought to the
front panel in the form of two sets of light emitting diodes (LED). The lower set refers to the
synchronous port and the upper set refers to the asynchronous port. A default button has been
provided to the right of this series of LEDs and if this button is depressed when the system is
powered ON, the unit will return to the default state.
To the right of the default button are two additional indicators, one above the other and each
rectangularity shaped. When the unit is powered ON, the upper indicator turns red and stays red until
the unit is powered down. The lower indicator provides a measure of the receive signal strength.
When the indicator is green, the receive signal on the current channel is sufficiently strong to
maintain a connection with the remote terminal. A weak signal will cause the indicator to turn off.
Each LED displays one of two different colors, green or red. Green indicates an active state or signal
presence, whereas red indicates an inactive state or signal absence. The configuration of the two
rows of LEDs is shown above and the table below indicates the function of each signal beginning
with the left most indicator.
Asynchronous Interface
Panel L E D Function
Data Carrier Detect (DCD) Indicates "connection established" with remote.
Data Terminal Ready (DTR) Signal from host (DTE) to device (DCE). May indicate
command mode escape or ignored by device.
Data Set Ready (DSR) Signal from device to host. May indicate connection
established or always on.
Clear To Send (CTS) Indicates device ready to accept data from host. Used in H/W
flow control.
Request To Send (RTS) Indicates host ready to send data to device. Used in H/W flow
control.
Receive Data (RxD) Serial data input to DTE from modem.
Transmit Data (TxD) Serial data input to modem from DTE.
Default Reset Button Reset device to factory defaults.
When the WINC 2400C is initially powered up the CTS and DSR indicators should be green,
whereas the RI and DCD indicators are red.
Once the connection is established, the DCD indicator turns green.
If the port is configured to use hardware flow control the CTS indicator will change to RED when the
WINC's internal buffer becomes full. When data is removed from the buffer the CTS indicator will
turn green again.
When a connection request from a remote terminal is received the RI turns green. It will turn red
when the connection is established or the connection request has timed out.