150-231-184-05, Revision 05
Front Panel
HLU-231 List 8D
October 25, 1999
7
DIAGNOSTIC MESSAGES
1=
xx
or 2=
yy
HDSL Loop Margin 1 or 2
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.
ACQ1 or ACQ2
Acquisition 1 or 2
The multiplexers of the HLU and HRU or first doubler are trying to
establish synchronization over Loop 1 or 2 of Span 1.
A
n
L1 or A
n
L2
Acquisition
n
Loop 1 or Loop 2
The multiplexers of the two devices on Span
n
are trying to establish
synchronization with each other on Loop 1 or 2, where
n
is the
number of the span.
ARM
HiGain System Armed
Armed to respond to Intelligent Repeater Loop Codes.
BAD RT?
No response from HRU
The HLU does not receive any response from the HRU. The integrity
of the HRU or the two HDSL loops (which may be open) is therefore
questionable.
CODE
xxxx
Line Code: AMI or B8ZS
Line code can be set to either of the two DS1 line code settings,
Alternate Mark Inversion (AMI) or Bipolar with 8-zero Substitution
(B8ZS). Displayed during System Settings review mode.
H1ES or H2ES
HDSL CRC Error Channel 1 or
Channel 2
HDSL Loop 1 or Loop 2 CRC error.
n
HDU
Number of Doublers
This message indicates the number (
n
) of doublers in the circuit.
INSL, then
xx
DB
Maximum Insertion Loss
The Maximum Insertion Loss message (INSL) appears followed by
xx
DB, where
xx
is the maximum insertion in dB of all spans and
loops. See
“HDSL Insertion Loss Guidelines” on page 50
LBPV
Local Bipolar Violation
A bipolar violation has been received at the DSX-1 input to the
HLU-231.
LIST
xxxx
HLU-231 List Number
The software list number (
xxxx
) appears during the System Settings
review mode. Press the MODE button for 3 seconds to display the
list number.
MNGD
Managed
The HLU is under control of the HMU-319 Network Management
Unit. In this state, the front panel craft port and pushbuttons are
disabled.
PWR GND
Power Feed Ground
One of the HDSL loops has been grounded.
PWR ON
Power Feed On
Indicates that the HDSL loops are not grounded or shorted.
PWR OFF
Power Feed Off
HDSL span power has been turned off by setting the PWRF option
to DIS, or HDSL span power has been turned off by use of the
A1LB/A2LB/A5LB Intelligent Office Repeater (IOR) Power Down
code.
PWRF SHRT
Power Feed Short
Indicates a short between the two HDSL pairs. 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.
SELF TEST
Self Test
The HLU is in a self-test mode. This occurs every power On/Off
cycle.
SIG 1 or SIG2
Signal 1 or Signal 2
The transceivers of the HLU and HRU or first doubler are trying to
establish contact with each other on Loop 1 or Loop 2 of Span 1.
S
n
L1 or S
n
L2
Signal
n
Loop 1 or Loop 2
The transceivers of the two devices on Span
n
are trying to establish
contact with each other on Loop 1 or Loop 2, where
n
is the number
of the span.
TLOS
Transmit Loss of Signal
DSX-1 signal is looped back to the DSX-1 interface at the HRU. The
HRU is in a logic loopback state caused by a loss of its DS1 input
from the CI, if enabled at the HRU by its TLOS switch option.
VER
xxxx
HLU-231 Version
The software version number appears during the System Settings
review mode. Press the MODE button for 3 seconds to display the
software version.
Table 2.
Front Panel Display Messages (Cont.)
Message
Full Name
Description