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Message
Description (normal operating messages in bold)
1=xx or 2=yy
Indicates the power of the received HDSL signal on each loop relative to noise. Any
value of 06 (dB) 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.
FERR
Framing bit error occurred at HLU DSX-1 input.
H1ES or H2ES
HLU HDSL Loop 1 or Loop 2 CRC error.
nHDU
Number (n) of doublers in the circuit.
INSL xxDB
The maximum Insertion Loss (INSL) message 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-388 List 5D.
MNGD
The HLU is under control of the HMU-319 network management unit.
PWR FEED GND
One of the HDSL loops has been grounded.
PWR FEED ON
Indicates that the HDSL loops are not grounded or shorted.
PWR FEED OFF
HDSL span power has been turned off.
PWR FEED 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.
TLOS
HRU is in a logic loopback state caused by a loss of its T1 input from the CI.
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 at -140 Vdc maximum.
AUTO = automatically switches between -140 Vdc for nondoubler applications and
±112 Vdc for doubler applications.
HIGH = ±112 Vdc 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.
LNCD
Line code = places the HLU and HRU in B8ZS or AMI mode.
SAIS
Enables (ENA) or disables (DIS) NREM/SMJK loopback mode.
MARG
0 to 15 dB; default is 4dB; can only be set through the Maintenance Terminal.
RDA
Enables (ENA) or disables (DIS) remote DS1 LOS at HRU input.
ALMP
Enables line to output an (AIS) payload of all ones or an (LOS) condition.
RTPV
Enables (ENA) or disables (DIS) remote provisioning.
BPVT
Enables (ENA) or disables (DIS) bipolar violation transparency (BVP).
CONF
YES = confirms that all operating modes are to be updated to their current selections.
NO = prevents the most recently selected operating mode selection from being updated.
Table 4. Front Panel Diagnostic Messages
Table 5. System Settings
-6
- 7
or 10
, respectively.
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