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The SNR (signal-to-noise ratio) Margin row displays both the current SNR margins and the minimum SNR margins for the current 24-hour data collection period. On the ADSL Menu (page 31), type 1 to display the ADSL Performance Status screen. 07/20/99 PAIRGAIN TECHNOLOGIES 03:25:24 ATU-R ADSL MEGABIT MODEM TERMINAL v 1.0 ADSL PERFORMANCE STATUS DOWN ALARMS: NONE UP ALARMS: NONE SYSTEM STATE: DATA DOWNSTREAM UPSTREAM ---------------- cur/ min cur/min SNR MARGIN (dB): 16.0/15.1 4.1/3.9 LINE ATTN (dB): 4.60 0.9 24 HOUR ES: 0 0 24 HOUR UAS: 0 0 DATA RATE (kbps): 7040 800 (C)lear (R)eturn (M)ain ENTER CHOICE--> Type C to clear the ADSL performance and alarm counters in both the Megabit Modem 310F and 320F. See the table on page 33 for a definition of each status field. Megabit Modem 310F and 320F User Manual Chapter 5: Monitoring Circuit Status and Displaying System Information 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 “Reach, Data 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. Megabit Modem 310F and 320F User Manual Monitoring ADSL Status Monitoring 24 Hour ADSL Performance History The 24 Hour ADSL Performance History report consists of eight screens. Each screen displays three hours of data, in 15-minute increments. Together, the eight screens provide a summary of the 24-hour performance history. From the ADSL Menu (page 31), type2 to open the 24 Hour ADSL Performance History screen. 07/20/99 PAIRGAIN TECHNOLOGIES 03:25:24 ATU-R ADSL MEGABIT MODEM TERMINAL v 1.0 24 HOUR ADSL PERFORMANCE HISTORY (errored seconds/unavailable seconds/snr) DOWNSTREAM UPSTREAM 02:45 000/000/15.5 000/000/3.9 02:30 000/000/16.0 000/000/3.9 02:30 000/000/ NA 000/000/ NA 02:30 000/000/ NA 000/000/ NA 02:45 000/000/ NA 000/000/ NA 02:30 000/000/ NA 000/000/ NA 02:30 000/000/ NA 000/000/ NA 02:30 000/000/ NA 000/000/ NA 02:45 000/000/ NA 000/000/ NA 02:30 000/000/ NA 000/000/ NA 02:30 000/000/ NA 000/000/ NA 02:30 000/000/ NA 000/000/ NA (C)lear (P)revious (N)ext (R)eturn (M)ain ENTER CHOICE--> To clear all ES and UAS counts, including the equivalent counts in the remote unit, type C . The minimum SNR for the period is reset to the current SNR. The 24 Hour ADSL Performance History data is lost when the modem is turned off. Megabit Modem 310F and 320F User Manual Chapter 5: Monitoring Circuit Status and Displaying System Information Monitoring 7 Day ADSL Performance History The 7 Day ADSL Performance History menu displays the ES and UAS counts, and the minimum SNR margins for the current day and the previous six days. Each day begins at 12 A.M. midnight, therefore the current day count is not necessarily equal to the count for the past 24 hours. From the ADSL Menu (page 31), type 3 to open the 7 Day ADSL Performance History screen. 07/20/99 PAIRGAIN TECHNOLOGIES 03:25:24 ATU-R ADSL MEGABIT MODEM TERMINAL v 1.0 7 DAY ADSL PERFORMANCE HISTORY (errored seconds/unavailable seconds/snr) DOWNSTREAM UPSTREAM 01/01/99 00000/00000/ 20.4 00000/00000/ 4.1 12/31/98 00000/00000/ NA 00000/00000/ NA 12/30/98 00000/00000/ NA 00000/00000/ NA 12/29/98 00000/00000/ NA 00000/00000/ NA 12/28/98 00000/00000/ NA 00000/00000/ NA 12/27/98 00000/00000/ NA 00000/00000/ NA 12/26/98 00000/00000/ NA 00000/00000/ NA (C)lear (R)eturn (M)ain ENTER CHOICE--> To clear all ES and UAS counts, including the equivalent counts in the remote unit, type The minimum SNR for the period is reset to the current SNR. The 7 Day ADSL Performance History data is lost when the modem is turned off. ....

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