Documenting events on the xDSL interface

The device generates a SYSLOG entry for each of the following xDSL interface events:

Status	Meaning	SYSLOG severity
xDSL: Booting modem: ...	The modem is restarting.	NOTICE
xDSL: Set up line to <line mode>/<line type>	The xDSL module establishes the connection with the mode and type specified. The following values are possible: Line mode: Disabled, auto and all modes configured in Setup > Interfaces > ADSL or VDSL interface. Line type: POTS, ISDN	INFORM
xDSL: Line is up. DS-Rate: ..., US-Rate: ..., DS-Margin: ..., US-Margin: ..., DS-Attn: ..., US-Attn: ..., Mode: ..., Profile: ....	The modem connected successfully with the specified values.	NOTICE
xDSL: Line data update. DS-Rate: ..., US-Rate: ..., DS-Margin: ..., US-Margin: ..., DS-Attn: ..., US-Attn: ..., Mode: ..., Profile: ...	After a synchronization, the modem and the DSLAM perform an optimization of the xDSL connection. This can lead to a change in the line values. After one minute, the modem transmits the current line values.	NOTICE
xDSL: Line data update.	After a synchronization, the modem and the DSLAM perform an optimization of the xDSL connection. After one minute, the modem transmits this message if the line values do not change after the synchronization.	NOTICE
xDSL: Line disconnected due to ....	The connection was disconnected for the specified reason. The following values are possible: modem reboot retrain silence high line error rate protocol setting line type setting automode line type switch modem timeout VC parameter change	NOTICE
xDSL: SNR margin (dB, Down/Up): .../...	The value between the required and measured signal-noise ratio (SNR) has changed by more than 1dB.	INFORM