ADC H4TU-C-319 List 1 Line Unit Front-Panel Display Messages, Message Full Name Description

LTPH-UM-1031-03, Issue 3 Front Panel

Table 2 lists the front-panel display messages. The four-character display reports the code of an alarm, loopback, or diagnostic message and, in some cases, is followed by a second four-character message that modifies the first message with a value or current configuration setting.

Table 2. Front-Panel Display Messages

Message	Full Name	Description
ALARM MESSAGES
ACO	Alarm Cutoff	A system alarm has occurred, and has been retired to an ACO
		condition by pressing the SEL pushbutton on the H4TU-C front panel.
ALRM	Alarm Condition Exists	A system alarm condition is in effect.
DBER	DS1 Bit Error Rate	A system DS1 BER alarm is in effect and remains in effect until cleared.
DU1U or DU1D	Doubler 1 Upstream or Downstream	Precedes LA, HBR, and MAL and indicates the first H4D doubler HDSL4
	Port	upstream or downstream interface.
DU2U or DU2D	Doubler 2 Upstream or Downstream	Precedes LA, HBR, and MAL and indicates the second H4D doubler
	Port	HDSL4 upstream or downstream interface.
HBRx	HDSL4 Block Error Rate Loop 1 or	A system HDSL4 Block Error Rate alarm is in effect. (x indicates
	Loop 2	Loop 1 or Loop 2.)
LAx	Loop Attenuation Loop 1 or Loop 2	The attenuation on the HDSL4 loop has exceeded the maximum
		threshold value. (x indicates Loop 1 or Loop 2.)
LAIS	Line Alarm Indication Signal	Indicates an AIS (unframed all ones) pattern is being received or
		transmitted at the H4TU-C DS1 input or output ports.
LLOS	Line (Unit) Loss of Signal	Indicates that no signal is detected at the DSX-1 input to the H4TU-C.
		Causes a system alarm.
LOF	Loss of Frame	The DS1 input does not contain the ESF or SF frame pattern setting of
		the FRMG option.
LOSW	Loss of Sync Word	Indicates that one of the HDSL4 loops has lost synchronization.
LRAI	Line RAI	Indicates an RAI alarm (yellow) from the CPE with an error-free signal
		from the line unit or network. RAI signal is transmitted towards the
		network.
MALx	Margin Alarm Loop 1 or Loop 2	The margin at Loop 1 or Loop 2 of the HDSL4 interface has dropped
		below the threshold (0 to 15 dB) set by the operator. (x indicates
		Loop 1 or Loop 2.)
PWR FEED GND	Power Feed Ground	The HDSL4 loop is grounded.
PWR FEED OPEN	Power Feed Open	Indicates a line power open condition.
PWR FEED SHRT	Power Feed Short	Indicates a short between Loop 1 and Loop 2 of the HDSL4 pair.
PRMF	Performance Report Messaging -	H4TU-R PRM-FE BER threshold has been exceeded at far end.
	Far End
PRMN	Performance Report Messaging -	H4TU-R PRM-NE BER threshold has been exceeded at near end.
	Near End
RAIS	Remote Alarm Indication Signal	Indicates an AIS (unframed all ones) pattern is being received or
		transmitted at the H4TU-R DS1 input or output ports.
RLOS	Remote (Unit) Loss of Signal	Indicates that no signal is detected at the DS1 input to the H4TU-R.
		Causes a system alarm.

RRAI	Remote RAI—Remote Alarm
	Indication at the H4TU-R (Net signal
	has errors.)
SPNn	Span Number

Indicates an RAI alarm (yellow) from the CPE with errors from the line unit or network. RAI-CI signal is transmitted towards the network.

Accompanies the LOSW alarm and identifies the span where the LOSW alarm occurred.

TUC	Transmission Unit Central Office	Precedes DBER, HBR, MAL, LA, and LOF alarms and indicates that the
		alarm has occurred at the H4TU-C Central Office unit.
TUR	Transmission Unit Remote End	Precedes DBER, HBR, MAL, LA, and LOF alarms and indicates that the
		alarm has occurred at the H4TU-R remote unit.
		Continued

H4TU-C-319 List 1 September 12, 2003 5