Paradyne 3551 manual Table C-1, DSU Status Indicators, Label Color Description, Table C-2

COMSPHERE 3550 Series Data Service Units

		Table C-1
		DSU Status Indicators
Label	Color	Description
OK	Green	Health and status indicator: DSU operation is normal. (The DSU has not
		detected any of the faults listed under Alrm, below.)
		This indicator flashes two times per second if a message from the NMS is
		present.
Alrm	Red	Health and status indicator:
		There is a fault in the local or remote DSU, DBM, or DDS facility, or there is a
		corrupted configuration.
		The following alarms at the local or remote DSU cause the Alrm status
		indicator on the affected DSU to light:
		Configuration Corrupt
		Device Fault
		Dial Tone Test Failure
		DTR Alarm
		Facility Alarm
		MUX Failure
		No Response
		Redundant Power Alarm
		Streaming Terminal
		Subnetwork Alarm
		Out-of-Frame Threshold
		Out-of-Service
Test	Yellow	Active device (DSU or DBM) is either performing a test or other DSUs or DBMs
		are in Test mode.1
Dial	Yellow	DBM is active
		Rapid flashing: Call setup in progress
		Slow flashing: Call established but in Standby mode
		Steady ON: Backup call established and active
TXD, RXD, RTS,	Green	Internal lead states at the DSU/DTE interface(circuit designations):
CTS, DSR, DTR,		Control circuit active or
LSD
		Data circuit SPACE(ing).
Front Panel	Yellow	DSU is currently selected at the SDCP. (The SDCP addresses one DSU at a
(Model 3551 only)		time.)

1 The DSU or DBM is automatically put into Test mode when a remote DSU or DBM is performing a disruptive test (e.g., a Local Loopback (LL) at the control DSU. A DSU or DBM in Test mode has its DTE interface turned Off).

		Table C-2
		SDCP Status Indicators
Label	Color	Description
OK	Green	Health and status indicator for the selected DSU; mirrors the OK indicator on
		the DSU faceplate.
Alrm	Red	Health and status indicator for the selected DSU; mirrors the Alrm indicator on
		the DSU faceplate.
BckUp	Yellow	Mirrors the BckUp LED on the selected DSU.
Test	Yellow	Mirrors the Test indicator on the selected DSU.
EC	Green	Error Correction indicator is for future use by dial network modems.

C-2 December 1996 3550-A2-GB20-20