If you are using PBX in a Flash, Travel'n Man 4 is available - »
pbxinaflash.com/communit ··· an-4.41/"
Once connected to 864, the caller will be prompted for an account number and PIN. Once entered, the credentials will be verified against the TravMan4 DB. If there's a match, the caller will be prompted to enter an IP address to be WhiteListed in IPtables"