ADC HiGain H2TU-C-202 Manual page 36

Monitoring System Activity and Performance
2 To initiate a loopback, press the
choice.
3 When prompted with the message: Are you sure (Y/N)?, press
cancel. For more information about loopbacks and troubleshooting, see
4 To initiate a loopdown of all active loopbacks, press the
5 When prompted with the message: Are you sure (Y/N)?, press
cancel.
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
HG (or PL)
PRM
System Status
28
SPACEBAR to cycle though the loopback choices. Press
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 22 on page 46
codes and activation methods.
Indicates type of alarm.
Indicates system is in an armed state and ready for loopback commands.
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.
HG displays when the loopback is initiated from a HiGain (HG) front panel or by a HiGain HDSL2
maintenance terminal loopback command. PL displays when the loopback is initiated by a
command embedded in the DS1 data path payload (PL).
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
February 28, 2001
Y
to initiate the loopback or
"Testing" on page
SPACEBAR to select LPDN, then press
Y to initiate the loopdown or
for a summary of the HiGain HDSL2 loopback
-7
LTPH-TP-1005-02, Issue 2
ENTER to make your
N
to
43.
ENTER .
N to
Bit Error Rate.
35.
H2TU-C-202 List 3E