Using Backup Modem ServersTactical Software's redirectors have a failover feature to prevent dial-out failures when a modem server stops responding. This could be due to a hardware failure or when the modem pool reaches its capacity.The failover feature allows entry of more than one modem server (either as an IP address or DNS name) in a space-separated list in the DialOut/EZ Control Panel.If DialOut/EZ is unable to make a connection to the first modem server in the list, it will try the second, third, then fourth, until it finds a modem server that accepts a TCP/IP connection or all four are checked.This feature also works with the DialOut/EZ Auto Configure feature, thus allowing users to see what modem servers are not responding to TCP connection attempts.If using a second modem server is cost prohibitive, a Windows PC with modems can be made into a backup modem server with our TacServe Modem Pool Server and accessed with any DialOut/EZ client.Using Backup License ManagersThe location of the License Manager under the Licensing button accepts a space-separated list of up to four IP addresses or hostnames. DialOut/EZ will try every License Manager listed until it receives a license or the list is exhausted. Example: If the site requires a 64 simultaneous connections, instead of using one 64-port License Manager, use four 16-port License Managers. On the DNS server, configure the entry for the License Manager with four A-records, each pointing to a different License Manager machine. Then configure each DialOut/EZ Site Edition client with the hostname under the Licensing button.When the DialOut/EZ Site Edition tries to obtain a license it will query the DNS server and obtain all four IP addresses of the License Manager systems. The DialOut/EZ Site Edition client will try each of the four License Manager machines before a licensing failure will occur.