Advertisement
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.
An L1 or An L2
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
HDSL Loop 1 or Loop 2 CRC error.
n HDU
Number (n) of doublers in the circuit.
INSL 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-231.
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.
Sn L1 or Sn L2
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)
(a)
EQL
Sets the DSX-1 Equalizer (EQL) to: EXT (replaces the Internal Equalizer with an External
Equalizer), 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.).
LPBK
Enables (ENA) or Disables (DIS) all inband SMJK loopback commands.
SPLB
Configures the system for generic inband loopback commands (GNLB) or special loopback
commands (A1LB, A2LB, A3LB, A5LB).
PWRF
DIS = disables HDSL powering.
LOW = HDSL line voltage is -140 Vdc maximum.
AUTO = automatically switches between -140 Vdc for non-doubler 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.
(a)
LBTO
Loopback timeout = NONE, 20, 60 or 120 minutes.
ALM
Enables (ENA) or disables (DIS) alarm indications due to remote DS1 LOS at HRU input.
(a)
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 (default = 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 (BPVT).
(a) Can be configured using the MODE and SEL buttons on the HLU front panel as well as through the craft port..
Front Panel Diagnostic Messages
System Setting Messages
Advertisement
