RAD Data comm ASMI-450 Interface Type, Data Terminal Ready DTR, Request to Send RTS

ASMi-450 Control from the Control Port

		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):

ASMi-450 Installation and Operation Manual 4-3