PairGain 150-1504-15, Руководство пользователя

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150-431-115-01, Revision 01 Maintenance
HLU-431 List 1E September 22, 1998 17
Figure 9. Span 2 Status Screen
Span Status Fields, Alarms, and Loopbacks
Table 7 lists the Span Status fields and descriptions. Table 8 on page 18 lists all possible alarms and loopbacks,
and their descriptions.
Table 7. Span Status Fields and Descriptions
Field Description
Time Time of day when Span Status was checked.
Date Date when Span Status was checked.
Circuit ID Shows the user-defined circuit ID.
Alarms Presence or absence of alarm conditions. See Table 12 on page 35 .
Loopback Indicates Off condition or identifies specific active loopback. See Table 13 on page 41 .
Margin Indicates the excess signal-to-noise ratio, at either the HLU or HRU, relative to a 10
-7
Bit Error
Ratio. The first value is the current margin, the second is the minimum margin, and the third is the
maximum value. NA means “Not Available.” The minimum and maximum margins are cleared and
updated every time the Span Status screen is cleared and every time the system clock passes
12:00 AM midnight.
Pulse Attenuation (ATTN) Indicates the attenuation of the 2B1Q pulse from the distant end. The value is related to the 196 kHz
loss of the cable pair. The pulse attenuation is a more direct indication of the loop attenuation to
the 2B1Q signal than is the 196 kHz loss. The normal HiGain ATTN operation range is from 0 to
28 dB.
Ins Loss Indicates the approximate insertion loss of the various loops at the HDSL line rate of 196 KHz. It
is generated by multiplying the PULSE ATTN by 1.25.
PPM Offset Indicates the relative offset of the crystal oscillator in the HLU from the HRU or HDU crystal
oscillator. Any value between -100 and +100 is adequate.
SPAN 2 STATUS
TIME: 12:06:04
DATE: 02/02/98
ALARMS: NONE
LOOPBACK: OFF
HDU1 HRU
HDSL-1 HDSL-2 HDSL-1 HDSL-2
cur/min/max cur/min/max cur/min/max cur/min/max
MARGIN: 21/21/21 21/21/21 21/21/21 21/21/21 dB
PULSE ATTN: 19 19 20 19 dB
INS LOSS: 23 23 25 23 dB
PPM OFFSET: 00 00 17 17 ppm
24 HOUR ES: 00000 00000 00000 00000 seconds
24 HOUR UAS: 00000 00000 00000 00000 seconds
DS1 STATUS
HLU HRU
24 HOUR BPV Seconds: 00000 00000
24 HOUR UAS Count: 00000 00000
Frame type: ESF ESF
Code type: B8ZS B8ZS
(E)xit (C)lear (U)pdate (S)pan
Circuit ID#: