Section 150-612-102
Revision 03
Page 12
12. TESTING
12.01
Table 2 provides a step by step test
procedure for the HRU-612 unit. This
procedure allows verification of the integrity of the
VHDSL channel to the HLU Line Hit as well as the
DS1 channels to the customer and the HLU DSX-1
interface. Table 3 lists the HLU status messages
which may also be helpful when coordinating turn-up
with CO personnel.
12.02
The HLU’s 4 character front panel has many
useful diagnostic messages. They are listed
in Table 3.
12.03
If trouble is encountered at the T1 interface,
verify that the unit is making a positive
connection with the mounting assembly’s connector.
TABLE 3. HLU 4 CHARACTER FRONT PANEL MESSAGES.
Message
Full Name
Description
CREM
Customer Remote Loopback
Signal from customer is looped back to customer at HLU-
611
NLOC
Network Local Loopback
DSX signal is looped back to DSX at HLU
CLOC
Customer Local Loopback
Signal from Customer is looped back to customer at HRU-
612
NREM
Network Remote Loopback
DSX signal is looped back to DSX at HRU
SMJK
Remote Smartjack Loopback
Signal from DSX is looped back at HRU by the HRU
smartjack module.
TLOS
Transmit Loss of Signal
The HRU is in a logic loopback state caused by a loss of its
T1 input from the NI, if enabled by the SAIS option.
FERR
Framing Bit Error Occurred
Framing bit error occurred at HLU T1 input
LBPV
Local Bipolar Violation
A bipolar violation has been received at the T1 input to the
HLU-611.
SIG1
Signal
The HLU & HRU transceivers are trying to establish
contact with each other.
ACQ1
Acquisition
The HLU & HRU multiplexers are trying to establish
synchronization over each loop.
HES
HDSL CRC Error
At least 1 CRC error on the VHDSL Loop in the last second.
ARM
HiGain-2 System ARMED
Armed to respond to Intelligent Repeater Loop Codes
ACO
Alarm CutOff
A MNRALM has occurred, and been retired to an ACO
condition, by depressing the SEL button on the HLU front
panel.
SELF TEST
Self Test
The HLU is in a self test mode. This occurs every power
ON/OFF cycle.
ALRM
Alarm Condition Exists
A minor alarm condition is in effect.
Table continued on next page