Chapter 5: Monitoring Circuit Status and Displaying System Information
Megabit Modem 310F and 320F User Manual
33
The following table describes the data displayed on the
ADSL Performance Status
screen.
Field
Meaning
Down Alarms
Identifies the current downstream alarms (toward the Megabit
Modem 320F). Options:
•
LOF - Loss of Frame
•
LOS - Loss of Signal
•
MAR - Margin
•
ES - Errored Seconds
•
SES - Severely Errored Seconds
•
SELF - Self Test Failed
•
NONE - No current alarms
Up Alarms
Identifies the current upstream alarms (transmission toward the
Megabit Modem 310F).
System State
Identifies the state of the ADSL system:
•
ACK - Acknowledge during handshake.
•
TRAINING - Modem is currently training.
•
CHANA - Channel analysis is in process.
•
EXCH - Exchange final handshaking messages.
•
DATA - Link is up and data can be transferred.
SNR Margin (dB)
Identifies the current (cur) and minimum (min) margin values for
the ADSL loop for the current 24-hour period. See
Rate, SNR Margin, and Noise Environment” on page 48
for
information on SNR margin and BER.
Line Attn (dB)
Indicates the line attenuation for the upstream and downstream
ADSL channels. Line attenuation is the decrease in amplitude of the
signal between transmission and receipt.
24 Hour ES
Indicates the total number of errored seconds that were detected on
the ADSL link during the current 24-hour period.
24 Hour UAS
Indicates the total number of unavailable seconds (UAS) that were
detected on the ADSL link during the current 24-hour period. UAS
indicate the amount of time that the lines were unavailable for
transmission since the modem was powered up or cleared.
Data Rate (kbps)
Identifies the current rates at which data is being transmitted.
