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Ignitionnet · 22-03-2009, 16:20

OK I'll save you the bother.

As you know 20Mbit is moved onto the DOCSIS 3 network along with the 50Mbit customers and there are 3 channels in use in most areas, 3 x 51Mbit. There are maybe 1 or 2 8.8Mbit upstreams available.

What you evidently don't know is that most of a legacy CMTS is being moved onto each 50Mbit MAC domain - In my CMTS's case if you were to move 75% of the customers across, not an uncommon combining apparently, you are dealing with 300 20Mbit modems on 2 8.8Mbit upstream and 3 51Mbit upstreams, not including the 50Mbit customers with no STM.

Presently the loading is around 100 modems of all tiers to an upstream, so you can see why a big uptake of 50Mbit with its' un-STM'd bandwidth restrictions might be problematic.

Any further questions have a check on your tools or log directly onto a 10k / BSR for how many nodes a single 50Mbit downstream group is spread across relative to a standard downstream.

22-03-2009, 16:20	#17
Ignitionnet Inactive Join Date: Jun 2008 Location: Leeds, West Yorkshire Age: 47 Posts: 13,995	Re: £80 set up fee??!! OK I'll save you the bother. As you know 20Mbit is moved onto the DOCSIS 3 network along with the 50Mbit customers and there are 3 channels in use in most areas, 3 x 51Mbit. There are maybe 1 or 2 8.8Mbit upstreams available. What you evidently don't know is that most of a legacy CMTS is being moved onto each 50Mbit MAC domain - In my CMTS's case if you were to move 75% of the customers across, not an uncommon combining apparently, you are dealing with 300 20Mbit modems on 2 8.8Mbit upstream and 3 51Mbit upstreams, not including the 50Mbit customers with no STM. Presently the loading is around 100 modems of all tiers to an upstream, so you can see why a big uptake of 50Mbit with its' un-STM'd bandwidth restrictions might be problematic. Any further questions have a check on your tools or log directly onto a 10k / BSR for how many nodes a single 50Mbit downstream group is spread across relative to a standard downstream.