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Message
(b)
PWR FEED SHRT
(b)
PWR FEED GND
(b)
PWR FEED OPEN
LOSW
LLOS
RLOS
LAIS
RAIS
LRAI
RRAI
xxx-LOF
xxx-DBER
PRMF
PRMN
xxx-HBER
xxx-MAL
xxx-LA
(a) Front-panel alarm messages are listed in order of priority.
Pressing the LBK pushbutton initiates an Alarm Cutoff (ACO) message.
(b) Message displays repeatedly as long as the alarm condition exists, and is not included in the priority order.
Table 2. Front-Panel Configuration Options Using MODE and SEL
Display Code Description (default values in bold)
EQL
Sets the DSX-1 Equalizer to: EXT (external), 0 (0 to 132 ft.), 133 (133 to 265 ft.), 266 (266 to 398
ft.), 399 (399 to 532 ft.), or 533 (533 to 655 ft.).
RLBO
Sets the H2TU-R line buildout to 0 dB, -7.5 dB, or -15 dB.
LPBK
Enables (ENA) or disables (DIS) SmartJack loopback commands.
SPLB xxxx
Configures system for generic (GNLB) or special in-band loopback commands (A1LB, A2LB, A3LB, A4LB,
or A5LB).
PWRF
OFF = disables HDSL2 powering; ON = HDSL2 line voltage is -180 Vdc maximum.
HBER
1E-6 or 1E-7 = alarm activates when the HDSL2 BER alarm threshold exceeds 10
NONE = prevents generation of a system alarm due to BER.
DBER
Enables (ENA) or disables (DIS) fixed 24-hour DS1 BER alarm threshold.
DS1
DSX-1 line code = AUTO, B8ZS, or AMI.
LBTO
Loopback timeout = NONE, 20, 60, or 120 minutes or 8 or 24 hours.
FRMG
DS1 frame formatting = AUTO (Auto framing mode), SF (SuperFrame), ESF (Extended
SuperFrame), or UNFR (Unframed mode).
RDA
Enables (ENA) or disables (DIS) alarm indications due to remote DS1 LOS at H2TU-R input.
ALMP
Enables system to output an alarm pattern: AIS or LOS.
BPVT
Enables (ENA) or disables (DIS) Bipolar Violation Transparency.
NLBP
Enables the H2TU-R to transmit either AIS or LOS towards CI for any network loopback.
TLOS
Enables (ENA) or disables (DIS) a logic loopback at the H2TU-R when an LOS occurs at its DS1 input.
RTPV
Enables (ENA) or disables (DIS) remote provisioning.
PBON
Configures the power output levels of the H2TU-C network unit toward the customer to comply with
Default (DEF) or Enhanced (ENH) templates.
PBOC
Configures the power output levels of the H2TU-C customer unit toward the network to comply with
Default (DEF) or Enhanced (ENH) templates.
(a) Front-panel configuration options display in the order listed.
(a)
Message
Description
A=xx
The highest loop attenuation (loss of signal power) measured in dB.
ACQ
The multiplexers of the H2TU-C and H2TU-R are trying to establish synchronization.
ARM
The H2TU-C is armed to respond to Intelligent Repeater Loop (ILR) codes.
BAD RT?
The H2TU-C is not receiving a response from the H2TU-R.
FERR
A framing bit error has occurred at H2TU-C DSX-1 input.
HES
H2TU-C HDSL2 loop cyclical redundancy check (CRC) error.
LBPV
A local bipolar violation has been received at the DSX-1 input to the H2TU-C.
M=xx
The power of the received HDSL2 signal relative to noise (S/N with respect to 21.5 dB).
PWR FEED OFF
HDSL2 span power is turned off.
PWR FEED ON
HDSL2 loop is not grounded or shorted.
SIG
The transceivers of the H2TU-C and H2TU-R are trying to establish contact with each other
over the HDSL2 loop.
(a) Normal operating messages are in bold.
Table 1. Front-Panel Alarm Messages
Description
A short between the Tip and Ring of the HDSL2 pair.
The HDSL2 loop is grounded.
A line-power open condition.
The HDSL2 loop has lost synchronization.
No signal is detected at the DSX-1 input to the H2TU-C.
No signal is detected at the DS1 input to the H2TU-R.
Line Alarm Indication Signal.
Remote Alarm Indication Signal.
An RAI alarm (yellow) from the CPE without errors from the line unit or network.
An RAI alarm (yellow) from the CPE with errors from the line unit or network.
The DS1 input does not contain the ESF or SF frame pattern setting of the FRMG option.
(xxx denotes either TUC or TUR.)
A system DS1 Bit Error Rate (BER) alarm. (xxx denotes either Transmission Unit
Central Office [TUC] or Transmission Unit Remote End [TUR].)
H2TU-R Performance Report Messaging BER threshold exceeded at far end.
H2TU-R Performance Report Messaging BER threshold exceeded at near end.
A system HDSL2 Block Error Rate (BER) alarm. (xxx denotes either TUC or TUR.)
The margin on the HDSL2 loop has dropped below the threshold setting.
(xxx denotes either TUC or TUR.)
The attenuation on the HDSL2 loop has exceeded the maximum threshold value.
(xxx denotes either TUC or TUR.)
Table 3. Front-Panel Diagnostic Messages
(a)
ALRM
displays prior to any alarm message.
(a)
-6
-7
or 10
.
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