>>Realms: There are two choices with our service. Use your own realm which would be your domain name.... example: username@your-domain.com One time set-up fee of $254.95 + the cost from each Network Carrier you wish the realm to be built on. Use our generic realm which would be.... example:  username@isponly.net   or   username@4dialup.net Total One time set-up fee of $254.95 which includes all networks we provide. Using your realm is the right way to go if you want to look like a full service "real" ISP but we suggest starting out with the Generic realm and moving to the "real" realm once you are bringing in the users. What is a Realm? A realm is the identifier on the networks for each user base. The "@" symbol in the domain name tells the networks to look at the name after it and check the database records of that database to see if the user exists. Example: When the user "joe@isponly.net" logs into a network the network will see the "@" symbol then read the domain name "isponly.net" and know to check that database to see if "joe" is really a member. If so the network will authenticate him and let him in.