ADC PAIRGAIN HiGain HDSL2 Manual page 43

152-231-115-03, Revision 03
Field
Active Loopback
Alarm type
Armed mode
Code type
DS1 ES Count
DS1 SES Count
DS1 UAS Count
Frame type
HDSL2 ES Count
HDSL2 SES Count
HDSL2 UAS Count
ID
LA
LPF
M
MAL
PL (or HG)
PRM
System Status
H2TU-C-231 List 1E
Table 14. 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 21 on page 49
codes and activation methods.
Indicates type of alarm.
Indicates system is in an armed state for an intelligent repeater loopback command.
Type of DS1 line coding used (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 Errored 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).
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 Errored Seconds—The number of seconds the HDSL2 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.
Loop Attenuation—indicates the attenuation of the Overlapped Pulse Amplitude Modulation
Transmission with Interlocking Spectra (OPTIS) pulse from the distant end. The value is related to
the 196 kHz loss of the cable pair. The loop attenuation is a more direct indication of the loop
attenuation to the OPTIS signal than is the 196 kHz loss. The normal HiGain HDSL2 LA operation
range is from 0 to 40 dB.
Line Power Feed—indicates the HDSL2 line power is on.
Margin—the signal-to-noise ratio at all HDSL2 ports, relative to a 10
Margin Alarm—Indicates the margin on HDSL2 loop has dropped below the threshold (0 to 15dB)
as set by the operator.
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 HiGain (HG) front panel or by a
HiGain 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 alarms (BER, MARG, LOS, AIS, AIS-CI, RAI, RAI-CI, LA) is indicated
on the lower right corner of all screens. See
alarms.
April 21, 2000
Monitoring System Activity and Performance
for a summary of the HiGain HDSL2 loopback
-7
Bit Error Rate.
Table 20 on page 45 for a list of the front-panel system
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