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Message
Description
1=xx or 2=yy
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
The multiplexers of the HLU and the HRU or the first doubler are trying to establish
synchronization over Loop 1 or Loop 2 of Span 1.
AnL1 or AnL2
The multiplexers of the two devices on Span n are trying to establish synchronization with
each other on Loop 1 or Loop 2, where n is the number of the span.
BAD RT?
The HLU is not receiving any response from the HRU.
CODE xxxx
The line code setting, where xxxx is Alternate Mark Inversion (AMI) or Bipolar with 8-Zero
Substitution (B8ZS).
FERR
Framing bit error occurred at HLU DSX-1 input.
FRM xxxx
Determines the type of frame pattern being received from the DSX-1 where xxxx is SF,
ESF, THRU, or NONE.
H1ES or H2ES
HLU HDSL Loop 1 or Loop 2 CRC error.
nHDU
Number (n) of doublers in the circuit.
INSL, then xxDB
The maximum Insertion Loss message (INSL) appears followed by xxDB, where xx is the
maximum insertion in dB of all spans and loops.
LBPV
A local bipolar violation has been received at the DSX-1 input to the HLU.
MNGD
The HLU is under control of the HMU-319 Network Management Unit.
PWRF GND
One of the HDSL loops has been grounded.
PWRF ON
Indicates that the HDSL loops are not grounded or shorted.
PWRF OFF
HDSL span power has been turned off.
PWRF SHRT
Indicates a short between the two HDSL pairs or the inability of the HRU to communicate
with the HLU.
SELF TEST
The HLU is in a self-test mode. This occurs every power on/off cycle.
SIG1 or SIG2
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.
SnL1 or SnL2
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.
Display Code
Description (default values in bold)
EQL
Sets the equalizer to DSX-1 for: 0 (0 to 133 ft.), 133 (133 to 266 ft.), 266 (266 to 399 ft.),
399 (399 to 533 ft.), 533 (533 to 655 ft.)
LBPK
Enables (ENA) or disables (DIS) all inband SMJK loopback commands
PWRF
DIS = disables HDSL powering
LOW = HDSL line voltage is -140 V max.
AUTO = automatically switches between -140 V for nondoubler applications and ±112 V
for doubler applications)
HIGH = ±112 V for all applications
BERT
NONE = prevents generation of a system alarm due to excessive BER
1E-6 or 1E-7 = alarm activates when BER threshold exceeds 10
LBTO
Loopback timeout = NONE, 20, 60, 120 minutes
ALM
Enables (ENA) or disables (DIS) the alarm relay
LNCD
Line code = places the HLU and HRU in B8ZS or AMI mode
SAIS
Enables (ENA) or disables (DIS) transmission of AIS signal during NREM/SMJK loopbacks
MARG
0 to 15 dB (can only be set through a maintenance terminal connected to the craft port);
the default is 4dB
RDA
Enables (ENA) or disables (DIS) alarm indications due to remote DS1 LOS at HRU input
ALMP
Enables a line to output an (AIS) payload of all ones or an (LOS) condition at its DS1 ports
for LOSW, DS1, LOS and margin alarms
RTPV
Enables (ENA) provisioning at the remote (when remotely logged in) or disables (DIS)
provisioning at the remote
BPVT
Enables (ENA) or disables (DIS) bipolar violation transparency (conversion of input DS1
BPVs and HDSL CRC errors into DS1 BPVs at the distant end's DS1 output port)
Front Panel Diagnostic Messages
System Settings
-6
-7
or 10
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