Issue 1, Section 150-231-164
Revision 04
Page 51
TABLE 21. HLU-231, LIST 6D 4-CHARACTER FRONT PANEL MESSAGES (CONTINUED)
Message
Full Name
Description
SELF TEST
The HLU is in a self test mode. This occurs every power
ON/OFF cycle.
ALRM
Alarm Condition Exists
A minor alarm condition is in effect.
1=xx or 2=yy
HDSL Loop Margins
Indicates the power of the received HDSL signal on each
Loop relative to noise. Any value of ‘06’ or greater is
adequate for reliable system operation.
PWR FEED
SHRT
Power Feed Short
Indicates a short between the 2 HDSL pairs in Span 1.
This same message can occur with an HRU that is
drawing the correct amount of power over good cable
pairs but cannot communicate with the HLU.
PWR FEED
OPEN
Power Feed Open
Indicates an open circuit in the T&R of either HDSL pair in
Span 1.
PWR FEED
OFF
Power Feed Off
HDSL span power has been turned off by setting the
PWFD option to DIS.
BAD RT?
No response from HRU
The HLU does not receive any response from the HRU.
Thus, the HRU’s integrity is questionable.
VER
HLU Software Version #
This is displayed during the System Settings review
mode. Depress the MODE button for 3 seconds.
LIST 0xL
HLU’s List #
Displayed during System Settings review mode defined
above.
FRM
Frame:SF,ESF,UNFR,NONE
Defines the type of frame pattern being received from the
DSX-1. Displayed during System Settings mode defined
above.
LOSW
Loss of Sync Word
Indicates that 1 of the HDSL loops has lost sync. Causes
a minor alarm.
LLOS
Local Loss of Signal
Indicates that no signal is detected at the T1 input to the
HLU. Causes a minor alarm.
RLOS
Remote Loss of Signal
Indicates that no signal is detected at the T1 input to the
HRU. Causes a minor alarm.
DS1
DS1 BPV errors
Indicates that the number of BPVs at the HLU or HRU
DS1 inputs have exceeded the 24 hour ES threshold.
Causes a minor alarm.
DS0
DS0 Blocked Channels
Indicates status of DS0 blocked channels. NONE
indicates no channels are blocked. BLK indicates some
channels are blocked.
MAL1(2)
Margin Alarm Loop 1 or 2
The margin on HDSL loop 1 (2) has dropped below the
threshold (1 to 15 dB) set by the user.
