The PAD hosts database is a list of remote hosts with associated parameters created by the System Administrator using the Solstice X.25 configuration tool x25tool. You can make PAD calls to remote hosts that are in the PAD hosts database simply by referring to them by name. You can also make PAD calls to remote hosts that are not in the PAD hosts database, but in this case you must specify parameters before connecting to the remote host.
By default, when you issue the pad command, the pad program will check the PAD Hosts Database to see if the specifed host matches one of the alias defined in the database. If there is a match, the pad program will use the parameters defined in the database to establish a connection.
If you use the -noaddrparse option with the pad program, the PAD program will not search the PAD Hosts Database.