I'm in total agreement. My point is simply that with IP connections, provided you are willing to spend the money, you can make them fully redundant. With the PSTN, it's not possible at any price.
John On Fri, Aug 10, 2012 at 11:32 AM, Ian Darwin <[email protected]> wrote: > Actually the "last mile" lack of redundancy typically affects both ends of > both types of connection. Almost everyone with an internet connection has > had "some kind of failure resulting in downtime" > > Whether analog or IP, at least outside of major built-up areas, the cost > of a second connection from a different supplier over 100% non-overlapping > cable paths is (last I looked into it) sufficiently non-trivial that only > major players will spring for it. Even in built-up areas, two suppliers may > be using the same cable path so the redundancy may (sometimes!) be illusory. > > The routing redundancy and failover advantages you mention are, of course, > why most PSTN calls are actually routed over IP by the major telcos... at > least beyond the "last mile". >
