> > Which at least partially explains the lower cost... there aren't any > TDM > circuits involved. > I'm always interested to hear why people say this: fundamentally, TDM is a lot simpler than IP, isn't it? Medium access control trivialized, way fewer overheads-they only reason IP used to be lower-cost was that you could access the medium inexpensively with Ethernet cards; Digium's changed that with their digital interface boards, haven't they? If Digium E1/T1 boards were sold in the volumes Ethernet interfaces were, I guess we'd pay less than $5/port, right? I always suspected the Big Transition to IP was more vendor push than operator pull, so I'm keen to hear why a sharp guy like Kevin would reckon that TDM is inherently more expensive than IP .. (Apologies if slightly off-topic, but this argument crops up again and again!) Cheers Charl
|