Use this type of endpoint when you need to initiate a
PPP connection with a remote host automatically.
This is commonly used to connect to Internet service providers.
A link established from this type of endpoint has the
following characteristics:
it acquires the use of a modem dynamically from a group of one
or more modems administered by UUCP
the local host machine brings up the link automatically by detecting
the presence of an outgoing IP packet for the remote
host's IP address
either the local host or the remote host must be able to specify the
IP addresses that identify them