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ASMi-450 Control from the Control Port
ASMi-450 Installation and Operation Manual 4-3
Interface Type
Control Line DCE DTE
CTS Out Not used
DCD Out Out
DSR Out Out
DTR In In
RI Not used In
RTS In In
Data Terminal Ready (DTR)
The terminal sets the DTR line ON (active) to gain control over the ASMi-450
and start a configuration/monitoring session.
When the DTR is ON, the front panel controls are disabled, and the LCD
displays a message that notifies the operator the ASMi-450 is under remote
management:
•
When the management mode defined by means of the DEF SP command is
the supervision terminal (
AUXILIARY DEVICE = TERMINAL
), the
LCD shows
TERMINAL ON LINE
.
•
When the management mode is the Telnet or SNMP (
AUXILIARY
DEVICE = NMS_SLIP
), the LCD shows
NETWORK ON LINE
.
The DTR line is OFF (inactive) when terminal control is not required. This ends
the terminal control connection, and returns the control to the ASMi-450 front
panel. If password protection is used, the password must be entered again the
next time the DTR line is set ON to start a new session.
Request to Send (RTS)
The RTS line is normally ON (active) when the control terminal is in session.
When the RTS line is OFF (inactive), the ASMi-450 interprets any data
received from the terminal on the TD line as MARK.
Clear to Send (CTS)
The state of the CTS line is determined by the CTS parameter:
ON
The CTS line is always ON (active).
=RTS
The CTS line follows the RTS line.
Data Carrier Detect (DCD)
The state of the DCD line depends on the communication address (node
number):