In message <Pine.LNX.4.31.0104181113520.7552-100000 at ockeghem.cisco.com>, stev e wolff typed: >>Jon Crowcroft wrote: >>-=< snip >=- >>>(would someone like to start a phone company that allows outgoing >>>calls only -? not much of a business case:-) >>Symmetry. => multicast. cheers jon