User guide

Software Engineering Video Services provided by ADSL
3-15
Telesyn Service Guide (Optimizing Video Services)
In addition to the monitoring of ES that is done by the audit, ES should be monitored by the network engineer. A
threshold should be set at 100 ES/hour to monitor both the quality of the loop and the performance of the audit.
This threshold is higher than what the audit provides for the following reasons:
• If the higher threshold is passed and its related log is produced, there is a problem on the port that the audit
cannot resolve (such as permanent physical impairments), and further troubleshooting is required.
• The performance of the audit can be monitored, and in the unlikely event the audit was not running, the
higher threshold would catch the rise in ESs and the log would indicate when it occurred.
3.2.5.3.2 Fault Counters
These counters increment for Link Fault events that are logged, and increment for these faults at the ADSL port
as well as the upstream port.
Table 3-6 describes the counters.
3.2.5.3.3 QOS Counters
There are four/eight queues for traffic management:
To track the bandwidth usage for these queues, there is a set of counters for sent and dropped packets for each
queue.
A high priority dropped packets condition indicates the amount of video traffic being pulled by the subscriber is
greater than the available bandwidth. The subscriber can cause this condition by using a PC client to join a video
multicast channel causing more multicast channels to be sent to the subscriber than the downstream rate can sup-
port. The Service Provider can cause this by providing the customer too many STBs which exceed the engineer-
ing rules listed in 3.2.4.2.
A low priority dropped packets condition indicates the amount of data being downloaded to the subscriber
exceeds the amount allocated. Again, refer to 3.2.4.2.
TABLE 3-6 Port Counter Faults (SHOW PORT COUNTER FAULT)
Counter Meaning
Loss of Link Keeps track of the number of times a loss of link condition occurred on the given
interface. The counter will wrap
Loss of Signal Keeps track of the number of times a loss of signal condition occurred on the given
interface. The counter will wrap
Loss of Frame Keeps track of the number of times a loss of frame condition occurred on the given
interface
Peer Not Present Keeps track of the number of times the modem goes offline.
(Reset) This flag can be set to true(1) to reset all fault counters to zero. The flag will set auto-
matically to zero so that it can be set to true to reset again