RAD Data comm ASMi-31 Chapter Operation, Controls and Indicators, Name Type ITU Circuit Function

Chapter 3

Operation

This chapter provides the following information for the ASMi-31 standalone modem:

•ASMi-31 front-panel indicators and controls

•Operating procedures (turn-on, front-panel indications, performance monitoring and turn-off).

Installation procedures given in Chapter 2 must be completed and checked before attempting to operate ASMi-31.

3.1 Controls and Indicators

Figure 3-1illustrates the ASMi-31 standalone modem front panel. Table 3-1lists the functions of the controls and indicators.

PWR RTS TD RD DCD LOS ERR TEST RESET

			Figure 3-1 ASMi-31 Front Panel
	Note	In ASMi-31 modem/X.21 RTS LED is equivalent to Control signal (C), and
		DCD LED is equivalent to Indication signal (I).
		Table 3-1	Front Panel Controls and Indicators
Name	Type	ITU Circuit	Function
RESET	Button		This switch resets the unit; it is used in place of a power switch.
			It is not needed for normal operation.
PWR	Green LED		On when ASMi-31 is powered up.
RTS	Yellow LED	105	On when the DTE has emitted an active Request to Send signal
			(or Control in X.21).
TD	Yellow LED	103	On when a steady space is being transmitted.
			Blinks when data is transmitted.
RD	Yellow LED	104	On when a steady space is being received.
			Blinks when data is received.

Controls and Indicators 3-1

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