3Com VCX V7122 SIP VoIP Gateway User Manual729 To reset the VCX V7122, see Save Configuration on page 88.Configuring the TDM Bus SettingsTo configure the TDM Bus Settings parameters, follow these steps:1 Open the ‘TDM Bus Settings’ screen (Advanced Configuration menu > TDM BusSettings); the ‘TDM Bus Settings’ screen is displayed.2 Configure the TDM Bus Settings parameters.3 Click the Submit button to save your changes.4 To save the changes so they are available after a power fail, see Save Configuration onpage 88.5 A device reset is required to activate the TDM Bus Settings parameters. To reset theVCX V7122, see Save Configuration on page 88.Figure 33 TDM Bus Settings ScreenSee Appendix E: VCX V7122 Clock Settings on page 211 for information on configuring the‘TDM Bus Clock Source’, ‘TDM Bus 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.Some parameter configuration options require a device reset; when this is thecase, the Web Interface prompts the user.Usually the ‘PCM Law Select’ parameter is set to A-law for E1 trunks and toμ-lawfor T1 trunks.
