ADC LPS-H4TU-C-L5 User Manual page 12

Overview
LED Color
Status (STAT)
Red
Yellow
Green
Off
RMT ALM
Yellow
Off
LBK
Yellow
Off
DS1 B8ZS
Green
Off
DS1 LOS/BER
Red
Yellow
Off
H4 CONT/SNR
Red
Flashing Red
Yellow
Off
L1 and L2
LOSW/BER
Red
Yellow
Flashing Green
Green
DS1 Test Jacks Description
MON Bantam jacks that provide non-intrusive access to monitor the DS1 signal.
IN Provides bridging jack access to the DS1 signal from the network.
OUT Provides bridging jack access to the DS1 signal from the CPE.
Controls Description
LBK pushbutton Creates a dual loopback at the H4LXR when the pushbutton is pressed >5 seconds and a loopback is not
present. If any loopback is present in the system (H4TU-C, H4DU, or H4TU-R) by pressing this pushbutton
>5 seconds that loopback will be dropped.
Extraction handle Pushing up on the extraction handle seats the H4LXC into the backplane card connector. Pulling down on the
extraction handle extracts the H4LXC from the backplane card connector.
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Table 2. H4LXC Front-Panel Components
Description
Displays results of self-test diagnostics.
Internal fault detected during diagnostics.
Module is initializing or performing self-test diagnostics.
Normal operation.
No power to the module or blown fuse
Indicates detection of remote alarm.
Remote alarm detected at the H4LXR module.
Normal operation.
Indicates loopback activity at the H4LXC.
Flashing: 1 flash per second when armed in intelligent loopback modes.
Steady: a.) Active DS1 loopback at the Central Office (CO), or b.) when the DISP RMT
pushbutton on the APU is pressed and there is an active loopback anywhere else in the
system.
Normal operation.
Indicates output line code configuration. In other words, it indicates what the CO is
transmitting to the network, and how the CO is configured. However, by pressing the
DISP RMT pushbutton on the APU, the RT setting is displayed as off for AMI and Green
if B8ZS is transmitted to the CPE.
Output code is provisioned for B8ZS.
Output code is provisioned for AMI.
Indicates loss of DS1 signal (LOS), Bipolar Violation (BPV), or Bit Error Rate (BER)
errors at DS1 interface.
LOS (DS1 receive signal is lost).
Brief Flash: Intermittent BPV errors.
Steady: BER threshold exceeded at local DS1 interface (default is 10
Normal operation.
Indicates loss of loop continuity and signal-to-noise ratio (SNR) errors.
The HDSL4 loop has lost continuity.
Indicates absence of span power.
SNR exceeded threshold value at near end of local loop (default is +5 dB).
Normal operation.
Indicates loss of HDSL4 frame synchronization (LOSW), Cyclical Redundancy Check
(CRC), or BER errors on Loop1 or Loop 2.
HDSL4 LOSW detected.
Brief Flash: HDSL4 CRC error on any segment of indicated loop.
Steady: BER threshold exceeded on indicated HDSL4 loop, (default is 10
HDSL4 activation in progress.
Normal operation.
December 3, 2003
LTPS-UM-8054-01
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LPS-H4TU-C-L5