122 V6100 and V7122 User GuideFigure 55 TDM Bus Settings ScreenUsually the ‘PCM Law Select’ parameter is set to A-law for E1 trunks and toμ-lawfor T1 trunks.See V7122 Clock Settings for information on configuring the ‘TDM Bus Clock Source’, ‘TDMBus Enable Fallback’ and ‘TDM Bus PSTN Auto Clock’ parameters.Restoring and Backing up the Gateway ConfigurationThe Configuration File screen enables you to restore (load a new ini file to the gateway) or toback up (make a copy of the VoIP gateway ini file and store it in a directory on yourcomputer) the current configuration the gateway is using.Back up your configuration if you want to protect your VoIP gateway programming. Thebackup ini file includes only those parameters that were modified and contain other thandefault values.Restore your configuration if the VoIP gateway has been replaced or has lost itsprogramming information, you can restore the VoIP gateway configuration from a previousbackup or from a newly created ini file. To restore the VoIP gateway configuration from aprevious backup you must have a backup of the VoIP gateway information stored on yourcomputer.To restore or back up the ini file: Open the ‘Configuration File’ screen (Advanced Configuration menu > ConfigurationFile); the ‘Configuration File’ screen is displayed.
