RAD Data comm ASM-20 operation manual Operating Instructions, Power On Procedure

ASM-20Installation and Operation ManualChapter 3. Operation

		Table 3-1	Control and Indicator Functions (Cont.)
Item	Name	Type	Function
E	RPF RESET	Pushbutton	Resets ERR/RPF LED (only available in ASM-20/R).
1	PWR	LED Indicator	Green LED is on when power is on.
2	RTS	LED Indicator	Yellow LED is on when terminal activates Request to Send.
		ITU 105
3	TD	LED Indicator	Yellow LED is on when steady SPACE is being transmitted. It
		ITU 103	flickers when data is transmitted.
4	RD	LED Indicator	Yellow LED is on when steady SPACE is being received.
		ITU 104	It flickers when data is received.
5	DCD	LED Indicator	Yellow LED is on when a valid receive signal is present.
		ITU 109
6	TEST	LED Indicator	Red LED is on when the ASM-20 is in any of the three loopback
		ITU 142	modes or PATT mode.
7	ERR/RPF	LED Indicator	ERR: Yellow LED goes ON momentarily when PATT switch is
			activated and then goes out. If there are errors in the test
			pattern, the LED blinks or remains ON.

RPF: Indicates power failure in remote standalone units (ASM-20/R only). Reset by depressing RPF reset push button.

Power On Procedure

3.3 Operating Instructions

ASM-20 operates entirely unattended, except when the occasional monitoring of LED indicators is required.

Apply AC power by connecting the AC power cord to an acceptable AC source. The PWR LED should light up, indicating that the ASM-20 is on. If the local and remote ASM-20 units are in operation and passing data, the following indicator conditions will exist:

∙PWR: On

∙	RTS:	On or Flashing
∙	TD:	Flashing or Off
∙	RD:	Flashing or Off

∙DCD: On or Flashing

∙TEST: Off.

If you do not obtain the above LED indications following initial power on, check that the three test push buttons are not depressed.

Operating Instructions 3-3