This page is available only when ADSL interface is available on the Quadro. It provides statistics information for traffic on the ADSL interface. The ATM Statistics page consists of two pages: General (with general information about the link) and ADSL (for interface specific statistics).
The General page consists of following sub-pages:
Common page provides information about the link/connection status (UP or DOWN) and the TX and RX bandwidths (in kbits).
The Link Event page provides the information about the link events.
The Last event field indicates the seconds since the last status change.
The Status change field indicates the number of status changes.
The Bandwidth change field indicates the number of bandwidth changes.
The AAL counters page indicates ATM cell counters ordered by the traffic type. Each of the following counters are presented for AAL0 (raw ATM cells), AAL2 (voice over ATM specific traffic type) and AAL5 (general data traffic (RFC1483R/B, PPPoA, PPPoE)):
TX cells - cells transmitted (upstream);
TX error - cells with transmission errors;
RX cells - cells received (downstream);
RX error - cells received with errors;
RX drop - received cells dropped due to a lack of local resources.
The Unassigned cells page indicates the number of ATM cells received that could not be associated with an existing connection. Value allows you to set the correct VCC (a two-part number containing the virtual cannel and connection identifier separated by a dot) if it is not configured correctly. A list of Unassigned cells displays the VCC of the received cells followed by the number off cells received with this VCC.
The OAM cells page indicates information about the OAM activities that can be used by the provider for testing monitoring purposes. This page displays a group of various parameters describing the OAM activities.
The second page of the ATM statistics displays ADSL interface related statistics. The ADSL page has the following subpages:
The Common subpage displays the following information:
ADSL device characteristics: type, version number and the serial number.
Operational mode displays the supported Annex type as detected by the modem after connecting to the central.
The Driver Condition displays the internal status of the modem driver. It should be active for normal modem operation.
The Link displays the ADSL link status. The internal status of the modem connection is displayed as link value.
The Performance subpage indicates an overview of available bandwidth, noise levels and events. It provides information about the line quality and for detecting line problems. The information below is displayed for both Upstream and Downstream.
The Capacity Occupation represents the ratio of the achieved linerate over the attainable linerate.
When the modem is up, Noise Margin indicates the realized noise margin. When the modem is down, the last measured noise margin is displayed.
The Output power provides the measured total output power downstream and upstream. When the modem is down, last measured power is shown.
The Attenuation is measured upon activation. It represents the difference between the total received power and references transmit power. Received signal power in dBm is the sum of the received power of all tones. The reference transmit signal power in dBm is the allowed transmit power taking into account power cutback transmitted over the full band. A value of 31db reported by ATU-R should be interpreted as 31db or higher.
When the modem is up, Bitrate interleaved and Bitrate fast fields indicate the actual ATM bitrate (without overhead) for the upstream / downstream fast or interleaved channel data flow.
The Counters and Defects indicates the counters for cells, events and anomalies of the fast (f) and interleaved (i) data flow. Events - bit errors that do not effect the device performance: FEC - Forward Error Correction. Anomalies - errors that effect the device performance: CRC - Cyclic Redundancy Check and HEC - Header Error Correction.
The Carrier Load subpage indicates an overview of the usage of the carrier signals frequencies.