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To: Darren DeNunzio who wrote (4664)7/15/1999 4:26:00 PM
From: E. Davies  Respond to of 12823
 
Darren,
You are assuming that the only way to seperate virtual channels is in the frequency domain. As you point out this is not flexible enough to work.

However it is also possible to separate virtual channels in the time domain. Both the upstream and downstream channels are structured as time slots which are assigned dynamically to the user.

In theory, the controller at the headend that assigns those time slots could have information about which ISP that particular user is assigned to. Then it would partitian out only a fixed maximum number of slots for each ISP according to how many slots that ISP has paid for.

This would still be a waste of a very limited data carrying capacity but it is the most "proper" method I can imagine. I just cant see any way that the user will benefit from multiple ISP's until the "last mile" is stable and has more than adequate capacity.

As long as the primary problems are occuring in the MSO structure and not in that of the ISP, one ISP will have no ability to provide better service than any other. Does anyone know the actual nature of the problems that are occuring in cable modems? Are they in the domain of the MSO or the ISP?

Eric