Specifications

Chapter 3 Operation Installation and Operation Manual
3-6 Configuration and Management Alternatives FCD-E1LC Ver. 1.0
Control
Line
Interface Type Function
DCE DTE
DSR Out Out
Data Set Ready line. The state of the DSR line is user-configurable.
• Usually, the DSR line is configured to track the DTR line. In this case,
if the control port interface is DTE, the DSR line will be set to ON for
five seconds when the RI line is ON while the DTR line is OFF.
• If the control port interface is DCE, the DSR line can also be
configured to be continuously ON. However, if the DTR line switches
to OFF, the DSR line will also switch to OFF for 5 seconds.
In addition, FCD-E1LC always sets DSR OFF (inactive) for 5
seconds when the EXIT command is executed or the disconnect
time-out expires.
DTR In In Data Terminal Ready line. The terminal sets the DTR line ON
(active) to gain control over FCD-E1LC and start a
configuration/monitoring session. When you end the terminal
control connection, the DTR line will switch to OFF (becomes
inactive).
RI Not Used In Ring Indication line. The RI line is used only with dial-up modems
(INT = DTE).
The RI line is normally OFF (inactive), and switches to the ON
(active) state when the modem, attached to the FCD-E1LC
front-panel CONTROL DCE connector, detects an incoming call.
RTS In In Request to Send line. The RTS line is normally ON (active) when
the supervisory terminal is in session. When the RTS line is OFF
(inactive), FCD-E1LC interprets any data received from the
terminal on the transmit input (TD) line as MARK.
Autobaud Function
When the Autobaud function is enabled, FCD-E1LC identifies the operating data
rate of the supervisory terminal by analyzing the timing of three consecutive
Enter + Line Feed characters (generated by pressing three times the <Enter>
key). The detected data rate is then used for the current communication session.
The automatic baud rate identification procedure is performed (or repeated)
whenever three consecutive <Enter>s are received after one of the following
events occurs:
• The DTR line has been switched off.
• The EXIT command has been executed.
• The idle disconnect timeout expired because no data has been exchanged
with the supervisory terminal.
In case one of these events occurred, FCD-E1LC assumes that the current
communication session has been terminated.
You must disable the Autobaud function if you intend to use SLIP or PPP
communication.
Note