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LTPH-UM-1031-03, Issue 3 Monitoring System Activity and Performance
H4TU-C-319 List 1 September 12, 2003 27
UAS Count Unavailable Seconds—The number of seconds during which the DS1 input signal was absent over
a 24-hour period.
Frame and Code Type
ESF Type of DS1 framing used on the input stream (SF, ESF, or UNFR).
B8ZS Type of DS1 line coding used (B8ZS or AMI).
HDSL4 Errors
ES Count 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.
SES Count 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.
UAS Count 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.
ID Circuit identification number.
INSL Insertion Loss—The signal loss value for a 196 kHz signal over the cable pair.
LA 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.
LPF Line Power Feed—Indicates the HDSL4 line power is on.
M Margin—The signal-to-noise ratio at all HDSL4 ports, relative to a 10
-7
Bit Error Rate.
PL (or HG) 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.
PRM The sum of the Performance Report Messaging-Near End (PRM-NE) and Performance Report
Messaging-Far End (PRM-FE) counts.
System Status 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 35.
Table 8. Monitor Screen Descriptions (Continued)
Field Description