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To: semi2000 who wrote (15163)	9/7/1999 9:40:00 PM
From: E. Davies	Respond to of 29970

what technology break-through chances exist for cable so that its upper limit will become big attraction for near future? The issues are less of technology breakthroughs than they are financial and organizational. In other words the technology is already available for much more significant data rates however the primary limitation is ways to make it more cost effective. Typically only one out of 100 or more available TV channels is currently assigned to broadband internet. Massive possible improvements right there. AT&T is currently working on a "mini-node" setup where the cable wire is shared with far fewer homes and the fiber is taken much deeper into the neighborhoods. They feel this will be cheaper in the long run because of less need to maintain electronics in the field. It also gives more bandwidth (on average) to the user because there is less sharing. They also intend for this to significantly reduce the price of the customer owned hardware- replacing the cable modem with a standard ethernet-like interface. The final step in the process will be to bring the fiber right to the home (or at least down every street). Doing this is also currently feasable, again it is simply a matter of the expense of running all the fiber and dealing with the customer interface to his PC. Eric

To: semi2000 who wrote (15163)	9/8/1999 7:07:00 AM
From: matt gray	Read Replies (1) \| Respond to of 29970

course wdm or dwdm to the HFC node. firstly, multiple channels exist to carry IP. Currently many systems only use one channel. Also, the fiber from the hub to the HFC node is typically only one wavelength that can be converted to higher wavelenghts in the future. This presents the opportunity to subdivide the HFC element and increase IP data rates to avoid congestion.