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LTPS-UM-8054-01
H4LXR I
NSTALLATION
Install the H4LXR in a remote chassis. Refer to the H4LXR installation document LTPH-QI-1083-xx for more
information.
T
T
URNUP
ROUBLESHOOTING
Use the information in Table 3 when the H4LXC or H4LXR fails its self-test at initial turnup.
Table 3. Troubleshooting the H4LXC and H4LXR Using LED Indicators
LED
STAT is red
RMT ALM is yellow
DS1 LOS/BER is yellow
DS1 LOS/BER is red
H4 CONT/SNR is yellow
H4 CONT/SNR is red
L1 or L2 LOSW/BER flashes
yellow
L1 or L2 LOSW/BER is steady
yellow
L1 or L2 LOSW/BER is red
LPS-H4TU-C-L5
Description
The module has failed self-test diagnostics. Remove and reinsert the H4LXC module, then wait while
the module again performs self-test diagnostics. If the STAT LED lights red at the end of the second
self-test, the module is defective. Remove the module and replace it with a new module. Repeat
Steps 2 through 6 of
"Installation" on page
An alarm condition (e.g., no DS1 signal, or a loop in LOSW) exists at the H4LXR or at the H4D
doubler.
The Bit Error Ratio (BER) of the DS1 network signal exceeds the threshold value (default value is
-7
10
).
A DS1 signal is not being received from the network.
The Signal-to-Noise ratio (SNR) on the HDSL4 loop is below the threshold value (default setting is
+5 dB).
There is an open circuit (that is, no continuity) on the HDSL4 loop.
An intermittent CRC error is being detected on the HDSL4 loop. Verify that the loop is within CSA
specification and that all connections are good.
The Bit Error Ratio (BER) of the HDSL4 signal on the loop exceeds the threshold value (default value
-7
is 10
).
The HDSL4 loop is not synchronized. Verify that the H4LXR is installed properly; that power is
available to the H4LXR; and that all HDSL4 loop connections are completed.
5.
December 3, 2003
Installation
7
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