When using a connection-oriented protocol, such as TCP, the IO$_
    ACCESS function initiates a connection and specifies a remote
    port number and IP address. When using a connectionless protocol,
    such as UDP, the IO$_ACCESS function sets the remote port number
    and IP address.
    For TCP, a connection request times out at a specified interval
    (75 seconds is the default). This interval can be changed by
    setting the inet subsystem parameter tcp_keepinit. The program
    can also set a specific timeout interval for a socket that it has
    created, as described in TCP Protocol Options.
    If a connection fails, you must deallocate the socket and then
    create a new socket before trying to reconnect.
    Related Functions
    The equivalent Sockets API function is connect().