Binary package “diald” in ubuntu intrepid

dial on demand daemon for PPP and SLIP

 Many sites use SLIP or PPP links to connect to other sites over phone
 lines. Normally these links must be explicitly turned on or off.
 diald can be used to bring a SLIP or PPP link up when there are
 Internet packets to be sent to another site, and to close the link
 down when it is idle.
 diald operates by starting a virtual link on a pseudo tty and setting up
 a route to the resulting interface. This interface is called the
 proxy. diald monitors the proxy to determine when to bring up a real
 communications link. When a real link is up diald routes packets from
 the proxy to the real link and monitors the real link to decide if it
 needs to be shut down. As well, if the link goes down unexpectedly
 diald will attempt to reestablish the link. The rules for controlling
 these operations are extensively configurable in run time startup
 Diald requires that you use either the ethertap interface (available
 in recent Linux kernels) or SLIP to provide the proxy interface.
 Thus, one or the other of these interfaces is required for diald to
 Diald needs a program like "chat" or "expect" to actually dial.
 Sorry, "dip" cannot be used.