List of procedures 7Networking Configuration GuideFirewall configuration resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 495Dial Up overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 497Dial Up Interfaces panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 501To add an ISDN interface ............................................................................................503To enable an ISDN interface .......................................................................................503To disable an ISDN interface.......................................................................................503To manually connect an ISDN interface ......................................................................504To disconnect an ISDN interface.................................................................................504To delete an ISDN interface ........................................................................................504To modify the characteristics of an existing ISDN channel .........................................506To configure the ISDN Link Parameters......................................................................507To add the modem interface........................................................................................508To enable the modem interface...................................................................................509To disable the modem interface ..................................................................................509To manually connect the modem interface..................................................................509To disconnect a modem interface ...............................................................................510To delete a modem interface.......................................................................................510To configure the Modem Link Parameters ..................................................................511To configure the Modem IP Address Specification......................................................512To assign a modem interface for WAN failover ...........................................................514To assign an ISDN interface for WAN failover ............................................................514To add an automatic dial-out interface ........................................................................522To manually disconnect an auto dial-out interface ......................................................522VPN overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 525Silence suppression . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 529ISDN overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 535Codec rates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 549Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 551