ADC HiGain HRU-402 Quick Installation page 5

V
ERIFICATION
Once the HRU is installed, verify that it is operating properly by monitoring the status
LEDs on the front panel.
LED Status
Alarm (ALM) LED
Solid red Indicates a LOS condition at the HRU-402 T1 input.
Blinking Indicates a LOS condition at the HLU T1 input.
HDSL LED
Solid green Indicates HDSL Loop 1 and Loop 2 are in sync.
Blinking once
per second
Blinking 4 times
per second
Blinking 10 times
per second
OFF Indicates no activity on the HDSL loop.
DS1 Framing (FRM)
LEDs (ESF and SF)
ESF LED = Solid green Indicates Extended Super Frame (ESF). The LED blinks once per second when a
SF LED = Solid green Indicates Super Frame (SF). The LED blinks twice per second when a frame error
OFF Indicates unframed or no signal.
DS1 Code LEDs
(B8ZS and AMI)
B8ZS LED = Solid green Indicates that the DS1 line code option is set to Bipolar with 8-Zero Substitution
AMI LED = Solid green Indicates that the user DS1 line code option is set to Alternate Mark Inversion
Loopback (LPBK) LED
Solid yellow Indicates Network Remote Loopback (NREM), SmartJack (SMJK), or Transmit
Blinking once
per second
Blinking 4 times per
second
L
OGGING ON TO THE
The HRU supports remote login through a maintenance terminal (ASCII terminal or a PC
running terminal emulation software) connected to the craft port on the HRU front panel.
Remote login creates menus and screens for the HRU that are identical to those viewed at
the HLU. Once logged on, access the Remote Terminal Main Menu screens to view system
settings, initiate loopbacks, and provision the circuit.
To log on and access the Remote Terminal Main Menu screens using a maintenance
terminal:
SPACEBAR
1 Press the
ENTER
2 Press the
The Remote Terminal Main Menu items are replications of the line unit screens.
Depending on the HLU attached to the HRU-402, remote provisioning may be
available. Refer to the appropriate HLU user manual for details.
For more detailed information about the Maintenance Terminal
screens, provisioning and loopback mode testing, download the
appropriate line unit user manual from the Customer Site portion of
the ADC Web page at www.adc.com.
Status LED Descriptions
Indicates
Shows alarm states for remote and local Loss of Signal (LOS).
Displays HDSL Loop 1 and Loop 2 conditions.
Indicates the HDSL loop is trying to acquire sync.
Indicates a margin alarm condition on the HDSL loop.
Indicates a Cyclical Redundancy Check (CRC) error on the HDSL loop.
Indications for framing patterns. If DS1 signals are not detected, the ESF, SF,
B8ZS, and AMI LEDs will not light.
frame error is indicated.
is indicated.
Indications for DS1 code options. If DS1 signals are not detected, the ESF, SF,
B8ZS, and AMI LEDs will not light.
(B8ZS). The LED blinks once per second when a string of excessive zeros is
detected.
(AMI). This LED blinks once per second when a Bipolar Violation (BPV) is
detected.
Shows loopback states to and from the network and to and from the Customer
Interface (CI).
Loss of Signal (TLOS).
Indicates Customer Local Loopback (CLOC) loopback state.
Indicates the HRU is in an Armed state.
several times to display the Remote Login screen.
key to view the HiGain Maintenance Terminal Screen.
M M
AIN ENU