ADC H4TU-C-388-L1 User Manual page 37

LTPH-UM-1122-02, Issue 2
Field
Active Loopback
Alarm type
MAL
Armed mode
BERT Status
DS1 Errors
ES Count
SES Count
UAS Count
Frame and Code Type
ESF
B8ZS
HDSL4 Errors
ES Count
SES Count
UAS Count
ID
INSL
LA
LPF
M
PL (or HG)
PRM
System Status
H4TU-C-388 List 1
Table 8. Monitor Screen Descriptions
Description
An active loopback is indicated on the lower third of the Monitor screen. Available loopbacks are
indicated by gray text. See Table 16 on page 52
codes and activation methods.
Indicates type of alarm.
Margin Alarm—Indicates the margin on HDSL4 loop has dropped below the threshold (0 to 15dB)
set by the operator.
Indicates system is in an armed state for an intelligent repeater loopback command.
Provides BERT Generator status, elapsed time, and BERT results.
Type of DS1 line coding received or sent (B8ZS or AMI).
Errored Seconds—The sum of the Errored Seconds-Line (ES-L) and Errored Seconds-Path (ES-P)
counts detected on the DS1 input over a 24-hour period. Errors included are: DS1 frame errors,
BPV, and ESF CRC errors.
Severely Errored Seconds—The sum of the DS1 Severely Errored Seconds-Line (SES-L) and
Severely Errored Seconds-Path (SES-P) counts over the last 24 hours.
Unavailable Seconds—The number of seconds during which the DS1 input signal was absent over
a 24-hour period.
Type of DS1 framing used on the input stream (SF, ESF, or UNFR).
Type of DS1 line coding used (B8ZS or AMI).
Errored Seconds—The number of 1-second intervals that contained at least one CRC or LOSW
error. This value is a running total of the last 24 Hours.
Severely Errored Seconds—The number of 1-second intervals that contain at least 50 CRC errors
or one or more LOSW defects. (An LOSW defect occurs when at least three consecutive HDSL
frames contain one or more frame bit errors.) This value is a running total of the last 24 hours.
Unavailable Seconds—The number of seconds the HDSL4 loop is unavailable. This occurs after
10 contiguous HDSL SES and is retired after 10 contiguous non-SES seconds. This value is a
running total of the last 24 hours.
Circuit identification (ID) number.
Insertion Loss—The signal loss value for a 196 kHz signal over the cable pair.
Loop Attenuation—Indicates the attenuation of the Overlapped Pulse Amplitude Modulation
(OPAM) transmission pulse from the distant end. Proper HDSL4 loop operation requires that this
value be less than 34 dB. This value differs from the Insertion Loss value of a conventional 196
kHz signal.
Line Power Feed—Indicates the HDSL4 line power is on.
Margin—The signal-to-noise ratio at all HDSL4 ports, relative to a 10
PL displays when the loopback was initiated by a command embedded in the DS1 data path
payload (PL). HG displays when the loopback was initiated from a HDSL Generic (HG) front panel
or by a maintenance terminal loopback command.
The sum of the Performance Report Messaging-Near End (PRM-NE) and Performance Report
Messaging-Far End (PRM-FE) counts.
The presence or absence of an alarm condition is indicated on the lower right corner of all screens.
System: OK indicates that there are no alarms present; System: Alarm indicates the presence of
an alarm. Refer to "Using the Performance Screens to View Alarm Data" on page
September 12, 2003
Monitoring System Activity and Performance
for a summary of the HDSL4 generic loopback
-7
Bit Error Rate.
35.
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