[horseman]

Originally Posted by Chrysalis

….There is no doubt tho that the docsis3 experience on a docsis1 modem is severely hindered, qas probably remembers when I signed up to 30mbit on the docsis1 modem on the 20mbit service on docsis3 network my speeds were at the time chaotic, I upgraded and got the superhub and then on a docsis3 device they stabilised and that was with a 50% higher speed package also.

Again there is indeed every doubt you can validly state(or infer) that experience is typical unless you present some degree of objective comparison with some analysis of the linecard types, number of cm's deployed per LC/port and types involved along with load balance groups, channel/frequency plans used.

For example I was quite happily provisioned on an Ambit256 via a D3 compliant CMTS for 18months without a degraded service until migrating to a SHub(with same IP) a couple of months ago. Similarly my son was on Ambit250 legacy (with 20XL tier, and still is!) before migrating to SuperHub over a year ago. However only when both d/s & u/s channels increased could a significant improvement be observed!

That said however using DOCSIS "mixed mode" is going to be finitely less efficient anyway without a doubt but until VM eventually migrate the remainder of their 4million+ BB subscribers it's going to be around for a long time yet. If VM did reduce the number of channels with MAP data and/or had not allocated correct load balance group configurations then your scenario may well have occurred to the detriment of the DOCSIS legacy CM, and perhaps even more so than the D3 unit.

Like most things here it's another pointless argument without supportive evidential data to compare objectively and thus only represents a couple of observations based on a limited statistical sample base.