PairGain ETU-772, Быстрое руководство по установке, Страница: 26 / 32

Viewing Status 700-722-900-02, Revision 02
20 June 21, 1999 UTU-722 and ETU-772 List 1
Monitor HDSL Span Screen
The following table lists the information displayed in each field of the
Monitor HDSL Span 1 screen.
Information Displayed in Monitor HDSL Span 1 Screen
Field Description
Current Margin
(dB) (MAR) Indicates the excess signal-to-noise ratio relative to a 10
-7
bit error
rate. The normal range of a typical margin is from 6 to 22 dB, with a
value of 6 dB corresponding to a predicted BER of 10
-10
.
Low Margin (dB) Indicates the lowest margin since startup or the last clearance of the
24-hour history.
High Margin (dB) Indicates the highest margin since startup or the last clearance of the
24-hour history.
Pulse Attenuation
(dB) Indicates the attenuation of the 2B1Q pulse from the distant end. This
value is related to the cable pair’s loss at 292 KHz. The normal range
of pulse attenuation is from 1 to 41 dB.
Errored Seconds
(ES) The number of one-second intervals in which at least one HDSL
CRC-6 error or loss of Sync Word (LOSW) was detected on the HDSL
span during the last 24 hours.
Unavailable
Seconds (UAS) The number of seconds that the HDSL span was down during the last
24 hours.
HDSL Tip/Ring
Reversal Indicates whether the two conductors of the HDSL span are correctly
connected or have been interchanged. The system automatically
compensates for an interchange of wire leads.
Clear 24 Hour
History Not available from this screen on Nx64k serial data port units. Use
clear history options in console screen History Menu.