User guide

SHDSL Port Audit Software Engineering
2-7
Telesyn Service Guide (Optimizing Data Services (SHDSL))
The following walk-through assumes that card16 is a SHDSL16 card, it has been installed, provisioned, and is in
service when the wiremode is modified.
Note: The subscriber’s modem must be configured in 4-wire mode for successful 4-wire operation.
The steps involved are:
1. Disable the card.
2. Set the card attribute WIREMODE to bonded.
3. Enable the card.
2.5.3 SHDSL Port Audit
With this user controllable audit, whenever a SHDSL loop experiences a degradation in quality (high Errored
Seconds) it will be detected by the audit and the port will be disabled and enabled to retrain the link.
Note: To change the level, the port must be disabled.
There are three levels of audit, as described in Table 2-2
TABLE 2-2 Levels of Testing for the Loop Audit
Level Audit Activities
OFF The audit is deactivated, SHDSL link quality is not monitored, automatic port retrains are not per-
formed (e.g., due to loss of connection). The line must be manually retrained via disable port/enable
port.
Note: This setting is for test purposes only.
LOW
The port is monitored for Data type applications. For SHDSL, this is the default set-
ting.
The SHDSL port will be monitored for catastrophic events such as “loss of link” and bit error
rates greater than allowed under TARGETSNRMARGIN. The port will automatically retrain due to
such events, and a Port Quality Retrain log is produced.
MEDIUM In addition to LOW:
The SHDSL port will be monitored for bit error rates
(approx. 10^-9 bit errors) that affect services
such as video. For SHDSL, this would not normally be used.
HIGH In addition to MED:
The SHDSL port will be aggressively monitored for bit error rates
(approx. 10^-10 bit errors) that
effect services such as video. For SHDSL, this would not normally be used.