ADC H4TU-C-319 List 1 Line Unit, HDSL4 user manual Insl, Lpf, Prm

LTPH-UM-1031-03, Issue 3Monitoring System Activity and Performance

	Table 8. Monitor Screen Descriptions (Continued)
Field	Description
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 10-7Bit 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.

H4TU-C-319 List 1 September 12, 2003 27